67486 + Interview Questions in Secondary School in Physics

5.	In this semester, you have learned several engineering subjects particularly Physics.In structure of matter, you have understood several important things. Now, couldyou explain how structure of matter helps in Civil Engineering study?
Answer» ANSWER: Following is how the structure of matter helps in Civil Engineering study: Explanation: Civil engineering is primarily concerned with bringing into life the architectures drawn on paper, which means it essentially involves the use of different FORMS of matter. This section of engineering is • concerned with constructing buildings, bridges, roads, etc, out of raw matter. So to have the knowledge of the material is of utmost importance for a civil engineer To know this, we need to have a basic idea about the structure of matter including its lattice structure, density, mass, heat tolerance, hardness, melting point, electrical conductivity, and the list GOES on. Without knowing these parameters we cannot choose the right material for our architecture and this could lead to HUGE blunders putting in danger so many lives. So, the structure of matter plays a key role in all civil engineering practices and hence is of GREAT importance.

5.

In this semester, you have learned several engineering subjects particularly Physics.In structure of matter, you have understood several important things. Now, couldyou explain how structure of matter helps in Civil Engineering study?

Answer»

ANSWER:

Following is how the structure of matter helps in Civil Engineering study:

Explanation:

Civil engineering is primarily concerned with bringing into life the architectures drawn on paper, which means it essentially involves the use of different FORMS of matter.

This section of engineering is • concerned with constructing buildings, bridges, roads, etc, out of raw matter. So to have the knowledge of the material is of utmost importance for a civil engineer

To know this, we need to have a basic idea about the structure of matter including its lattice structure, density, mass, heat tolerance, hardness, melting point, electrical conductivity, and the list GOES on.

Without knowing these parameters we cannot choose the right material for our architecture and this could lead to HUGE blunders putting in danger so many lives.

So, the structure of matter plays a key role in all civil engineering practices and hence is of GREAT importance.

Discussion

6.	What is meant by poltergeists???please explainno copied answers
Answer» ANSWER: $\huge\fbox\purple{Required\:Answer}$ In ghostlore, a poltergeist (/ˈpoʊltərˌɡaɪst/ or /ˈpɒltərˌɡaɪst/; German for "noisy ghost" or "noisy SPIRIT") is a type of ghost or spirit that is responsible for physical DISTURBANCES, such as loud noises and OBJECTS being moved or destroyed.

6.

What is meant by poltergeists???please explainno copied answers

Answer»

ANSWER:

$\huge\fbox\purple{Required\:Answer}$

In ghostlore, a poltergeist (/ˈpoʊltərˌɡaɪst/ or /ˈpɒltərˌɡaɪst/; German for "noisy ghost" or "noisy SPIRIT") is a type of ghost or spirit that is responsible for physical DISTURBANCES, such as loud noises and OBJECTS being moved or destroyed.

Discussion

7.	How many images are formed when an object is between two Mirrors whose reflecting surfaces are inclined act and angle of °1. 90°2. 60°3. 45°
Answer» Answer: 90° because the IMAGE REFLECTED b/w the MIRROR

7.

How many images are formed when an object is between two Mirrors whose reflecting surfaces are inclined act and angle of °1. 90°2. 60°3. 45°

Answer»

Answer:

90° because the IMAGE REFLECTED b/w the MIRROR

Discussion

8.	12 The end A of uniform rod AB of length 1m is maintained at 100°C and the end B at 10°C. Thetemperature a' a distance of 60cm from the end B is
Answer» Answer: 54 DEGREE celsius Explanation: STEPS in ATTACHMENT

8.

12 The end A of uniform rod AB of length 1m is maintained at 100°C and the end B at 10°C. Thetemperature a' a distance of 60cm from the end B is

Answer»

Answer:

54 DEGREE celsius

Explanation:

STEPS in ATTACHMENT

Discussion

9.	A. N 800B. N 80000C. N 8000000WITH EXPLAINING
Answer» ANSWER: B. N 80000 , B. N 80000 , B. N 80000 , B. N 80000 , B. N 80000 , B. N 80000 , B. N 80000 , B. N 80000.

9.

A. N 800B. N 80000C. N 8000000WITH EXPLAINING

Answer»

ANSWER:

B. N 80000 , B. N 80000 , B. N 80000 ,

B. N 80000 , B. N 80000.

Discussion

10.	Speed of longitudinal waves depends on
Answer» noun. CONSISTENT repetition of a state, course of ACTION, behavior, or the like, making it possible to KNOW in advance what to expect:The PREDICTABILITY of their daily lives was both COMFORTING and boring.

Discussion

11.	What if octopuses are from europa???only quality answers needed
Answer» seriously?? EUROPA EVEN have LIFE?? Yes but according to scientists IO has the CAPABILITY of SUSTAINING life in the future....

Discussion

12.	State law of conservation of Momentum
Answer» EXPLANATION: The conservation of momentum states that, within some PROBLEM domain, the amount of momentum remains constant; momentum is neither created nor destroyed, but only CHANGED through the action of FORCES as described by Newton's laws of motion.

12.

State law of conservation of Momentum

Answer»

EXPLANATION:

The conservation of momentum states that, within some PROBLEM domain, the amount of momentum remains constant; momentum is neither created nor destroyed, but only CHANGED through the action of FORCES as described by Newton's laws of motion.

Discussion

13.	Velocity of a projectile becomes2 times of initial velocity when it'svelocity makeshorizontal Then what will be theangle of projectionmakes 30angle with
Answer» Answer: The ACCELERATION DUE to gravity is ALWAYS vertically due to gravity is always vertically downwards. Therefore, at the uppermost point of a projectile, its velocity and acceleration are at an angle of 90∘.

13.

Velocity of a projectile becomes2 times of initial velocity when it'svelocity makeshorizontal Then what will be theangle of projectionmakes 30angle with

Answer»

Answer:

The ACCELERATION DUE to gravity is ALWAYS vertically due to gravity is always vertically downwards. Therefore, at the uppermost point of a projectile, its velocity and acceleration are at an angle of 90∘.

Discussion

14.	A car starts from rest with constant acceleration covering a distance of 1200m in 40s. Calculate its velocity at this time.
Answer» ANSWER: BLA bla bla bla bla bla bla bla bla bla EXPLANATION: bla bla bla bla bla bla

14.

A car starts from rest with constant acceleration covering a distance of 1200m in 40s. Calculate its velocity at this time.

Answer»

ANSWER:

BLA bla bla bla bla bla bla bla bla bla

EXPLANATION:

bla bla bla bla bla bla

Discussion

15.	What is an octopus??are they aliens??? are octopuses from europa?????no copied answers please
Answer» ANSWER: an OCTOPUS is an eight handed animal. they are not aleins because they are from EARTH

15.

What is an octopus??are they aliens??? are octopuses from europa?????no copied answers please

Answer»

ANSWER:

an OCTOPUS is an eight handed animal.

they are not aleins because they are from EARTH

Discussion

16.	1. ASSERTION: No particle may have a speed as large as speed of light.REASON: Infinite energy of any substance is not possible.
Answer» Answer: That is why all the particles that move at the speed of LIGHT (e.g. photons) have zero rest mass. As a PARTICLE with mass approaches the speed of light, its energy increases and BECOMES INFINITE at the speed of light, which is the reason why it can never be accelerated to reach that speed.

16.

1. ASSERTION: No particle may have a speed as large as speed of light.REASON: Infinite energy of any substance is not possible.

Answer»

Answer:

That is why all the particles that move at the speed of LIGHT (e.g. photons) have zero rest mass. As a PARTICLE with mass approaches the speed of light, its energy increases and BECOMES INFINITE at the speed of light, which is the reason why it can never be accelerated to reach that speed.

Discussion

17.	How many images are formed when an object is between two Mirrors whose reflecting surface are inclined at an angle of °1. 90°2. 60°3. 45°NOTE :-DON'T GIVE INVALID ANSWER
Answer» Answer: 1 IMAGE FORMED in 90°. 2 image was formed in 60°. 2 image was formed in 45°.

17.

How many images are formed when an object is between two Mirrors whose reflecting surface are inclined at an angle of °1. 90°2. 60°3. 45°NOTE :-DON'T GIVE INVALID ANSWER

Answer»

Answer:

1 IMAGE FORMED in 90°.

2 image was formed in 60°.

2 image was formed in 45°.

Discussion

18.	How can privent the corrossion
Answer» ANSWER: By oiling, PAINTING ETC we can PREVENT corrosion

18.

How can privent the corrossion

Answer»

ANSWER:

By oiling, PAINTING ETC we can PREVENT corrosion

Discussion

19.	A bucket containing water is tied to one end of a rope 5 m long and it is rotated in avertical circle about the other end. Find the number of rotations per minute in order that the water in the bucket may not spill.
Answer» Answer: A bucket CONTAINING water is tied to one end of a rope of length 2.5 m and rotated about the other end in a VERTICAL CIRCLE so that water does not spill EVEN when bucet is upside down .

19.

A bucket containing water is tied to one end of a rope 5 m long and it is rotated in avertical circle about the other end. Find the number of rotations per minute in order that the water in the bucket may not spill.

Answer»

Answer:

A bucket CONTAINING water is tied to one end of a rope of length 2.5 m and rotated about the other end in a VERTICAL CIRCLE so that water does not spill EVEN when bucet is upside down .

Discussion

20.	State and prove Bernoulli's theorem for a non-viscous liquid.
Answer» Answer: Bernoulli’s theorem: According to Bernoulli’s theorem, the sum of pressure energy, kinetic energy, and potential energy per unit mass of an incompressible, nonviscous fluid in a streamlined flow remains a constant. Mathematically, PρPρ + 1212v2 + gh = Constant This is known as Bernoulli’s equation. Proof: Let us consider a flow of liquid through a pipe AB. Let V be the volume of the liquid when it enters A in a time t which is equal to the volume of the liquid leaving B in the same time. Let aA , VA and PA be the area of cross section of the tube, velocity of the liquid and pressure exerted by the liquid at A respectively. Let the force exerted by the liquid at A is FA = PA aA Distance travelled by the liquid in time t is d = va t Therefore, the work done is W = FA d = PA aA vA t But a v t = aA d = V, volume of the liquid entering at A. Thus, the work done is the pressure energy (at A), W = PA d = PA V Pressure energy per unit volume at Pressure energy per unit mass Since m is the mass of the liquid entering at A in a given time, therefore, pressure energy of the liquid at A is EPA = PA V = PA V × ( mmmm) = mPAρPAρ Potential energy of the liquid at A, PEA = mghA Due to the flow of liquid, the kinetic energy of the liquid at A, KEA = 1212 mvA2A2 Therefore, the total energy due to the flow of liquid at A, EA = EPA + KEA + PEA EA = mmPAρmPAρ + 1212mv2AvA2 + mghA Similarly, let aB , VB and PB be the area of cross section of the tube, velocity of the liquid and pressure exerted by the liquid at B. Calculating the total energy at FB, we get EB = mmPBρmPBρ + 1212mv2BvB2 + mghB From the law of conservation of energy, EA + EB Thus, the above equation can be written as PρgPρg + 1212v2gv2g + h = Constant The above equation is the consequence of the conservation of energy which is true until there is no loss of energy due to friction. But in practice, some energy is lost due to friction. This arises due to the fact that in a fluid flow, the layers FLOWING with different velocities exert frictional forces on each other. This loss of energy is generally converted into heat energy. Therefore, Bernoulli’s relation is strictly valid for fluids with zero viscosity or non-viscous liquids. Notice that when the liquid flows through a horizontal pipe, then h = 0 ⇒ PρgPρg + 1212 v2gv2g = Constant

20.

State and prove Bernoulli's theorem for a non-viscous liquid.

Answer»

Answer:

Bernoulli’s theorem: According to Bernoulli’s theorem, the sum of pressure energy, kinetic energy, and potential energy per unit mass of an incompressible, nonviscous fluid in a streamlined flow remains a constant. Mathematically, PρPρ + 1212v2 + gh = Constant This is known as Bernoulli’s equation. Proof: Let us consider a flow of liquid through a pipe AB. Let V be the volume of the liquid when it enters A in a time t which is equal to the volume of the liquid leaving B in the same time. Let aA , VA and PA be the area of cross section of the tube, velocity of the liquid and pressure exerted by the liquid at A respectively. Let the force exerted by the liquid at A is FA = PA aA Distance travelled by the liquid in time t is d = va t Therefore, the work done is W = FA d = PA aA vA t But a v t = aA d = V, volume of the liquid entering at A. Thus, the work done is the pressure energy (at A), W = PA d = PA V Pressure energy per unit volume at Pressure energy per unit mass Since m is the mass of the liquid entering at A in a given time, therefore, pressure energy of the liquid at A is EPA = PA V = PA V × ( mmmm) = mPAρPAρ Potential energy of the liquid at A, PEA = mghA Due to the flow of liquid, the kinetic energy of the liquid at A, KEA = 1212 mvA2A2 Therefore, the total energy due to the flow of liquid at A, EA = EPA + KEA + PEA EA = mmPAρmPAρ + 1212mv2AvA2 + mghA Similarly, let aB , VB and PB be the area of cross section of the tube, velocity of the liquid and pressure exerted by the liquid at B. Calculating the total energy at FB, we get EB = mmPBρmPBρ + 1212mv2BvB2 + mghB From the law of conservation of energy, EA + EB Thus, the above equation can be written as PρgPρg + 1212v2gv2g + h = Constant The above equation is the consequence of the conservation of energy which is true until there is no loss of energy due to friction. But in practice, some energy is lost due to friction. This arises due to the fact that in a fluid flow, the layers FLOWING with different velocities exert frictional forces on each other. This loss of energy is generally converted into heat energy. Therefore, Bernoulli’s relation is strictly valid for fluids with zero viscosity or non-viscous liquids. Notice that when the liquid flows through a horizontal pipe, then h = 0 ⇒ PρgPρg + 1212 v2gv2g = Constant

Discussion

21.	A body weighing 0.5 kg tied to a string is projected with a velocity of 10 m/s. Thebody starts whirling in a vertical circle. If the radius of the circle is 0.8 m, find the tension in the string when the body is at the top of the circle
Answer» Answer: A body weighing 0.5 kg TIED to a string is PROJECTED with a velocity of 10 m/s. The body starts whirling in a vertical circle. If the radius of the circle is 0.8 m, find the tension in the string when the body is at the TOP of the circle

21.

A body weighing 0.5 kg tied to a string is projected with a velocity of 10 m/s. Thebody starts whirling in a vertical circle. If the radius of the circle is 0.8 m, find the tension in the string when the body is at the top of the circle

Answer»

Answer:

A body weighing 0.5 kg TIED to a string is PROJECTED with a velocity of 10 m/s. The

body starts whirling in a vertical circle. If the radius of the circle is 0.8 m, find the

tension in the string when the body is at the TOP of the circle

Discussion

22.	Explain, why is it difficult for a fireman to hold a hose, which ejects large amounts of water at a high velocity.
Answer» Answer: if you have ever HEARD about NEWTON's third LAW you may EASILY answer to this question Explanation: the force of water is apparently very high and the fireman can't hold pipe

22.

Explain, why is it difficult for a fireman to hold a hose, which ejects large amounts of water at a high velocity.

Answer»

Answer:

if you have ever HEARD about NEWTON's third LAW you may EASILY answer to this question

Explanation:

the force of water is apparently very high and the fireman can't hold pipe

Discussion

23.	Three particles A, B and C of equal mass, movewith equal speed v along the medians of anequilateral triangle as shown in figure. They collideat the centroid G of the triangle. After collision Acomes to rest and B retraces its path with speedv. What is the speed of C after collision?
Answer» ANSWER: hiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

23.

Three particles A, B and C of equal mass, movewith equal speed v along the medians of anequilateral triangle as shown in figure. They collideat the centroid G of the triangle. After collision Acomes to rest and B retraces its path with speedv. What is the speed of C after collision?

Answer»

ANSWER:

hiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Discussion

24.	State any four applications of geostationary satellites
Answer» Explanation: Uses: DIRECT BROADCAST TV, Communication network, DEFENCE and intelligence, global positioning or GPS - which is used. for satellite navigation SYSTEMS.

24.

State any four applications of geostationary satellites

Answer»

Explanation:

Uses: DIRECT BROADCAST TV, Communication network,

DEFENCE and intelligence, global positioning or GPS - which is used.

for satellite navigation SYSTEMS.

Discussion

25.	What do you mean by positive, negative and zero works?give oneexample ofeach.
Answer» Answer: EXAMPLE: When an object MOVES on horizontal surface,force and displacement acts in forward direction. So,work done is POSITIVE. NEGATIVE WORK:The work done is said to be negative work when force and displacement are in OPPOSITE direction. Explanation: $i \: hope \: its \: helpful \: to \: you$

25.

What do you mean by positive, negative and zero works?give oneexample ofeach.

Answer»

Answer:

EXAMPLE: When an object MOVES on horizontal surface,force and displacement acts in forward direction. So,work done is POSITIVE. NEGATIVE WORK:The work done is said to be negative work when force and displacement are in OPPOSITE direction.

Explanation:

$i \: hope \: its \: helpful \: to \: you$

Discussion

26.	What is oxidation and reaction
Answer» ANSWER: Oxidation is the loss of ELECTRONS during a reaction by a molecule, atom or ion. Oxidation occurs when the oxidation state of a molecule, atom or ion is increased. ... In this reaction, hydrogen is being oxidized and FLUORINE is being reduced. *Pls* *MARK* me brainliest..

26.

What is oxidation and reaction

Answer»

ANSWER:

Oxidation is the loss of ELECTRONS during a reaction by a molecule, atom or ion. Oxidation occurs when the oxidation state of a molecule, atom or ion is increased. ... In this reaction, hydrogen is being oxidized and FLUORINE is being reduced.

Pls MARK me brainliest..

Discussion

27.	Write ditels note on error in major
Answer» Answer: A terminal is the POINT at which a conductor from a component, device or network comes to an end. Terminal may ALSO refer to an electrical connector at this endpoint, acting as the reusable INTERFACE to a conductor and creating a point where external CIRCUITS can be CONNECTED

27.

Write ditels note on error in major

Answer»

Answer:

A terminal is the POINT at which a conductor from a component, device or network comes to an end. Terminal may ALSO refer to an electrical connector at this endpoint, acting as the reusable INTERFACE to a conductor and creating a point where external CIRCUITS can be CONNECTED

Discussion

28.	7. A wire of resistance R is cut into five equal pieces. These five pieces of wire are then connectedin parallel. If the resultant resistance of this combination is Rs. What is the ratio of R/R,?
Answer» EXPLANATION: UCIEVOjLpgZwEPRJkBEfsCaQ this is my you TUBE link please SUSCRIBE me on you tube please GAME FREE FIRE

28.

7. A wire of resistance R is cut into five equal pieces. These five pieces of wire are then connectedin parallel. If the resultant resistance of this combination is Rs. What is the ratio of R/R,?

Answer»

EXPLANATION:

UCIEVOjLpgZwEPRJkBEfsCaQ

this is my you TUBE link

please SUSCRIBE me on you tube please

GAME FREE FIRE

Discussion

29.	Pls solve it plss solve iy
Answer» ANSWER: its not SEEN CLEARLY dear SEND it NEATLY

29.

Pls solve it plss solve iy

Answer»

ANSWER:

its not SEEN CLEARLY dear SEND it NEATLY

Discussion

30.	The Centripetal force of 45N is required to revolve a stone of 100g along a circular path of radius 50 cm .Find the constant speed of the stone.
Answer» MARK as BRAINLIEST THANKS

Discussion

31.	An electric iron of 1500 W is used for 20 minutes every day, find electric energyconsumed in themonth of April.
Answer» ANSWER: POWER of electric iron=1500W Usage PER day=20min/day x 30 days the answer is 25 w Explanation:

31.

An electric iron of 1500 W is used for 20 minutes every day, find electric energyconsumed in themonth of April.

Answer»

ANSWER: POWER of electric iron=1500W

Usage PER day=20min/day x 30 days

the answer is 25 w

Explanation:

Discussion

32.	Pls solve it plss solve
Answer» ANSWER: From which CHAPTER THUS This QUESTIONS BELONG!!

32.

Pls solve it plss solve

Answer»

ANSWER:

From which CHAPTER THUS This QUESTIONS BELONG!!

Discussion

33.	An object is placed at 45 cm in front of converging mirror ( CONVEX MIRROR ) of radius of curvation 30cm. At what distance the image would be formed. Mention the nature of the image ( BY EXPLANATION )PLEASE DON'T GIVE ANY BAD ANSWERSIF YOU DO IT LIKE THAT I WILL REPORT ANSWER
Answer» Answer: Given, Type of Spherical Mirror = Convex Object Distance (u) = -45 CM [Value taken as negative because object is placed on opposite side of shiny part of convex mirror] Radius of CURVATURE (R) = +30 cm Focal Length (f) = R/2 = +30/2 cm = +15 cm Let's take image distance as v cm. According to equation, = 1/f = 1/v+1/u = 1/15 = 1/v - 1/45 = 1/15 + 1/45 = 1/v = ( 3 + 1 )/45 = 1/v = 4/45 = 1/v = 45/4 cm = v = 11.25 cm = v The Image is formed at 11.25 cm away from the POLE of the mirror. The Image is virtual as the LIGHT rays appear to meet in a convex mirror. The Image is diminished in size like it is in a convex mirror. I hope this helps.

33.

An object is placed at 45 cm in front of converging mirror ( CONVEX MIRROR ) of radius of curvation 30cm. At what distance the image would be formed. Mention the nature of the image ( BY EXPLANATION )PLEASE DON'T GIVE ANY BAD ANSWERSIF YOU DO IT LIKE THAT I WILL REPORT ANSWER

Answer»

Answer:

Given,

Type of Spherical Mirror = Convex

Object Distance (u) = -45 CM

[Value taken as negative because object is placed on opposite side of shiny part of convex mirror]

Radius of CURVATURE (R) = +30 cm

Focal Length (f) = R/2

= +30/2 cm

= +15 cm

Let's take image distance as v cm.

According to equation,

= 1/f = 1/v+1/u

= 1/15 = 1/v - 1/45

= 1/15 + 1/45 = 1/v

= ( 3 + 1 )/45 = 1/v

= 4/45 = 1/v

= 45/4 cm = v

= 11.25 cm = v

The Image is formed at 11.25 cm away from the POLE of the mirror.

The Image is virtual as the LIGHT rays appear to meet in a convex mirror.

The Image is diminished in size like it is in a convex mirror.

I hope this helps.

Discussion

34.	Formula to find average valocity.
Answer» ANSWER: TOTAL displacement divided by total TIME is the CORRECT answer

34.

Formula to find average valocity.

Answer»

ANSWER:

TOTAL displacement divided by total TIME is the CORRECT answer

Discussion

35.	What is conservative and non-conservativeforce? describe with an example.
Answer» A conservative force is a force with the property that the TOTAL work DONE in moving a particle between two points is INDEPENDENT of the path TAKEN. ... Gravitational force is an example of a conservative force, while FRICTIONAL force is an example of a non-conservative force.

Discussion

36.	A bus travels 54 km in 90 minutes. What is the speed of the bus? in seconds
Answer» ANSWER: Correct option is B 10m/s speed = distance / TIME =54 * 1000 /90 * 60 =10 m/s

36.

A bus travels 54 km in 90 minutes. What is the speed of the bus? in seconds

Answer»

ANSWER:

Correct option is

B

10m/s

speed = distance / TIME

=54 * 1000 /90 * 60

=10 m/s

Discussion

37.	Please tell the answer!
Answer» ANSWER: i am SORRY but what is the CLASS is this QUESTION from

37.

Please tell the answer!

Answer»

ANSWER:

i am SORRY but what is the CLASS is this QUESTION from

Discussion

38.	Pls solve it poora kra
Answer» ANSWER: a a a d d Hope you had a GOOD DAY;)

38.

Pls solve it poora kra

Answer»

ANSWER:

a
a
a
d
d

Hope you had a GOOD DAY;)

Discussion

39.	QUİCKLY PLEASEEE HELPX:180NY:?
Answer» Answer: 288n Explanation: SINCE X=180 it should be more than 180n x+y+y>x

39.

QUİCKLY PLEASEEE HELPX:180NY:?

Answer»

Answer:

288n

Explanation:

SINCE X=180

it should be more than 180n

x+y+y>x

Discussion

40.	State the Hooke's law.
Answer» Explanation: Hooke's law is a law of physics that states that the FORCE needed to extend or compress a spring by some distance scales linearly with respect to that distance—that is, Fₛ = kx, where K is a constant factor characteristic of the spring, and x is SMALL COMPARED to the total possible DEFORMATION of the spring.

40.

State the Hooke's law.

Answer»

Explanation:

Hooke's law is a law of physics that states that the FORCE needed to extend or compress a spring by some distance scales linearly with respect to that distance—that is, Fₛ = kx, where K is a constant factor characteristic of the spring, and x is SMALL COMPARED to the total possible DEFORMATION of the spring.

Discussion

41.	What do you mean by VIBGYOR
Answer» ANSWER: V - violet I - indigo B - BLUE G - green Y - yellow O - ORANGE R - red VIBGYOR is a popular mnemonic device USED for memorizing the traditional optical spectrum. Explanation: hope it helps you

41.

What do you mean by VIBGYOR

Answer»

ANSWER:

V - violet

I - indigo

B - BLUE

G - green

Y - yellow

O - ORANGE

R - red

VIBGYOR is a popular mnemonic device USED for memorizing the traditional optical spectrum.

Explanation:

hope it helps you

Discussion

42.	The distance travelled by an object in a specified direction is :a)speedb)displacementc)velocityd)acceleration
Answer» b) displacement The distance travelled by an object in a SPECIFIC direction is called displacement. ... The RATE of CHANGE of displacement is called the velocity of the given object.

42.

The distance travelled by an object in a specified direction is :a)speedb)displacementc)velocityd)acceleration

Answer»

b) displacement

The distance travelled by an object in a SPECIFIC direction is called displacement. ... The RATE of CHANGE of displacement is called the velocity of the given object.

Discussion

43.	(c) Calculate the magnifying power of a lens of power+ 20 dioptre, when the image of an object is formed by theens at least distance of distinct vision.23. (a) A candle is placed at 90 cm apart from a screen
Answer» ANSWER: dhdjejjesjjsksksksksksskskkswew

43.

(c) Calculate the magnifying power of a lens of power+ 20 dioptre, when the image of an object is formed by theens at least distance of distinct vision.23. (a) A candle is placed at 90 cm apart from a screen

Answer»

ANSWER:

dhdjejjesjjsksksksksksskskkswew

Discussion

44.	Explain the scalar product of two vectors. Mention it's any two properties.
Answer» Answer: Definition:- Scalar products can be FOUND by taking the component of one vector in the direction of the other vector and multiplying it with the magnitude of the other vector”. It can be defined as: Scalar product or dot product is an algebraic operation that takes two equal-length sequences of numbers and returns a single number. Properties:- The scalar product of two vectors A and B is a scalar quantity equal to the product of the two vectors and the COSINE of the smallest ANGLE between them. The scalar product is commutative ,A×B⇒B×A. When we form the scalar product of two vectors,we MULTIPLY the parallel component of the two vectors.

44.

Explain the scalar product of two vectors. Mention it's any two properties.

Answer»

Answer:

Definition:-

Scalar products can be FOUND by taking the component of one vector in the direction of the other vector and multiplying it with the magnitude of the other vector”. It can be defined as: Scalar product or dot product is an algebraic operation that takes two equal-length sequences of numbers and returns a single number.

Properties:-

The scalar product of two vectors A and B is a scalar quantity equal to the product of the two vectors and the COSINE of the smallest ANGLE between them.
The scalar product is commutative ,A×B⇒B×A.
When we form the scalar product of two vectors,we MULTIPLY the parallel component of the two vectors.

Discussion

45.	Would electrons move from higher potential to lower potential or vice versa?What about proton?
Answer» Answer: Would electrons MOVE from higher potentials to lower potentials or vice-versa? Ans. Positive charges move from higher to lower POTENTIAL REGIONS. Negatively charged electrons move from lower to higher potential regions.

45.

Would electrons move from higher potential to lower potential or vice versa?What about proton?

Answer»

Answer:

Would electrons MOVE from higher potentials to lower potentials or vice-versa?

Ans. Positive charges move from higher to lower POTENTIAL REGIONS. Negatively charged electrons move from lower to higher potential regions.

Discussion

46.	A man of mass 50 kg carries a bag of we500 N on his shoulder. The force with whichfloor pushes up his feet will be (g = 9.8 m/s
Answer» Answer :- The force with which floor PUSHES up his feet will be 540N. Step-by-step EXPLANATION: To Find :- The force with which floor pushes up his feet Solution: Given that, g = 9.8 m/s A man of MASS 50kg carries a BAG of weight 500N Therefore, Mass of the bag :- ⟶ m × a = F ⟶ m × 9.8 = 500 ⟶ m = 500/9.8 ⟶ m = 51.02 kg So, Total mass:- [ mass of man + mass of bag ], ⟶ Total mass = 50kg + 51.02kg ⟶ [ 50 + 51.02 ] kg ⟶ 101.02 kg ∴ The force with which floor pushes up his feet is :- F = a × m Where, F = Force a = acceleration due to gravity m = Mass ⟶ F = m × a ⟶ F = 51.02 × 9.8 ⟶ F = 499.99N Hence, The force with which floor pushes up his feet is 499.99N.

46.

A man of mass 50 kg carries a bag of we500 N on his shoulder. The force with whichfloor pushes up his feet will be (g = 9.8 m/s

Answer»

Answer :-

The force with which floor PUSHES up his feet will be 540N.

Step-by-step EXPLANATION:

To Find :-

The force with which floor pushes up his feet

Solution:

Given that,

g = 9.8 m/s
A man of MASS 50kg carries a BAG of weight 500N

Therefore,

Mass of the bag :-

⟶ m × a = F

⟶ m × 9.8 = 500

⟶ m = 500/9.8

⟶ m = 51.02 kg

So, Total mass:- [ mass of man + mass of bag ],

⟶ Total mass = 50kg + 51.02kg

⟶ [ 50 + 51.02 ] kg

⟶ 101.02 kg

∴ The force with which floor pushes up his feet is :-

F = a × m

Where,

F = Force
a = acceleration due to gravity
m = Mass

⟶ F = m × a

⟶ F = 51.02 × 9.8

⟶ F = 499.99N

Hence, The force with which floor pushes up his feet is 499.99N.

Discussion

47.	HELP ME PLEASEX:180NY:?
Answer» ANSWER: okokokkokklklkklkkiokokkooooikl

47.

HELP ME PLEASEX:180NY:?

Answer»

ANSWER:

okokokkokklklkklkkiokokkooooikl

Discussion

48.	2) Calculate the pressure exerted by a brick which applies a force of 2.5 N, when, (a) It is placed on its widest base (b) It is placed on upright on the soil. The length, breadth and height are given in the diagram.(A)(B)5 25 cmcm10 cm25 cm 5 cm________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Answer» Correct Question :- Calculate the PRESSURE exerted by a brick, which applies force of 2.5 N, when (a) it is placed UPRIGHT on the SOIL (b) when it is placed on its widest BASE. The dimensions of the brick are 25 cm × 10 cm × 5cm. Answer :- (a) When the brick is placed upright : Area in contact with soil $= 10 \sf cm \times 5 \sf cm = \frac{10}{100} m \: \times \frac{5}{100} m \\ = \: \: \: 0.005 {m}^{2} \\ \therefore \: Pressure \: exerted = \frac{Force}{Area} = \frac{2.5 \: N}{0.005 {m}^{2} } \\ = 500 \: Pa \:$ (b) When the brick is placed on its widest base : Area in contact with soil $= 25 \sf \: cm \: \times 10 \sf \: cm \: = \frac{25}{100}m \: \times \frac{10}{100}m \\ = 0.025 {m}^{2} \\ \therefore Pressure \: exerted \: = \frac{Force}{Area } = \frac{2.5N}{0.025 {m}^{2} } \\ = 100Pa$ Hope this is helpful for you.

48.

2) Calculate the pressure exerted by a brick which applies a force of 2.5 N, when, (a) It is placed on its widest base (b) It is placed on upright on the soil. The length, breadth and height are given in the diagram.(A)(B)5 25 cmcm10 cm25 cm 5 cm________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Answer»

Correct Question :-

Calculate the PRESSURE exerted by a brick, which applies force of 2.5 N, when (a) it is placed UPRIGHT on the SOIL (b) when it is placed on its widest BASE. The dimensions of the brick are 25 cm × 10 cm × 5cm.

Answer :-

(a) When the brick is placed upright :

Area in contact with soil

$= 10 \sf cm \times 5 \sf cm = \frac{10}{100} m \: \times \frac{5}{100} m \\ = \: \: \: 0.005 {m}^{2} \\ \therefore \: Pressure \: exerted = \frac{Force}{Area} = \frac{2.5 \: N}{0.005 {m}^{2} } \\ = 500 \: Pa \:$

(b) When the brick is placed on its widest base :

Area in contact with soil

$= 25 \sf \: cm \: \times 10 \sf \: cm \: = \frac{25}{100}m \: \times \frac{10}{100}m \\ = 0.025 {m}^{2} \\ \therefore Pressure \: exerted \: = \frac{Force}{Area } = \frac{2.5N}{0.025 {m}^{2} } \\ = 100Pa$

Hope this is helpful for you.

Discussion

49.	Define wave layouts??
Answer» Answer: A website layout is a pattern (or FRAMEWORK) that defines a website's STRUCTURE. It has the role of STRUCTURING the information PRESENT on a site both for the website's OWNER and for users. It provides clear paths for navigation within webpages and puts the most important elements of a website front and center.

49.

Define wave layouts??

Answer»

Answer:

A website layout is a pattern (or FRAMEWORK) that defines a website's STRUCTURE. It has the role of STRUCTURING the information PRESENT on a site both for the website's OWNER and for users. It provides clear paths for navigation within webpages and puts the most important elements of a website front and center.

Discussion

50.	20. What is the pressure on a swimmer 10m below the surface of a lake? Atmospheric pressure is101x105 Pa. Taking density of water 1000 kg/m3.
Answer» Explanation: Atmospheric pressure at the SURFACE LEVEL = 1.01×10⁵ Pa Pressure difference between surface and swimmer's POSITION = Height × Density × g = 10M × 1000 kg/m³ × 10 m/s² = 10⁵ Pa Therefore, Pressure on the swimmer = 10⁵ + 1.01 ×10⁵ Pa = 2.01 × 10⁵ Pa

50.

20. What is the pressure on a swimmer 10m below the surface of a lake? Atmospheric pressure is101x105 Pa. Taking density of water 1000 kg/m3.

Answer»

Explanation:

Atmospheric pressure at the SURFACE LEVEL = 1.01×10⁵ Pa

Pressure difference between surface and swimmer's POSITION = Height × Density × g = 10M × 1000 kg/m³ × 10 m/s² = 10⁵ Pa

Therefore, Pressure on the swimmer = 10⁵ + 1.01 ×10⁵ Pa

= 2.01 × 10⁵ Pa

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

compare the time period of two pendulum such that the value of gravity on moon is 1.6 m^-2 that on earth in 9.8ms^-2​

How to solve this above question​

4. What does the path of an objectlook like when it is in uniformmotion?s​

Why do we say “a pair of pants” if it’s only one thing?

In this semester, you have learned several engineering subjects particularly Physics.In structure of matter, you have understood several important things. Now, couldyou explain how structure of matter helps in Civil Engineering study?

Following is how the structure of matter helps in Civil Engineering study:

Explanation:

What is meant by poltergeists???please explainno copied answers​

In ghostlore, a poltergeist (/ˈpoʊltərˌɡaɪst/ or /ˈpɒltərˌɡaɪst/; German for "noisy ghost" or "noisy SPIRIT") is a type of ghost or spirit that is responsible for physical DISTURBANCES, such as loud noises and OBJECTS being moved or destroyed.

How many images are formed when an object is between two Mirrors whose reflecting surfaces are inclined act and angle of °1. 90°2. 60°3. 45°​

12 The end A of uniform rod AB of length 1m is maintained at 100°C and the end B at 10°C. Thetemperature a' a distance of 60cm from the end B is​

A. N 800B. N 80000C. N 8000000WITH EXPLAINING

Speed of longitudinal waves depends on​

What if octopuses are from europa???only quality answers needed​

State law of conservation of Momentum​

Velocity of a projectile becomes2 times of initial velocity when it'svelocity makeshorizontal Then what will be theangle of projectionmakes 30angle with​

A car starts from rest with constant acceleration covering a distance of 1200m in 40s. Calculate its velocity at this time.​

What is an octopus??are they aliens??? are octopuses from europa?????no copied answers please​

1. ASSERTION: No particle may have a speed as large as speed of light.REASON: Infinite energy of any substance is not possible.​

How many images are formed when an object is between two Mirrors whose reflecting surface are inclined at an angle of °1. 90°2. 60°3. 45°NOTE :-DON'T GIVE INVALID ANSWER ​

How can privent the corrossion​

A bucket containing water is tied to one end of a rope 5 m long and it is rotated in avertical circle about the other end. Find the number of rotations per minute in order that the water in the bucket may not spill.​

State and prove Bernoulli's theorem for a non-viscous liquid. ​

A body weighing 0.5 kg tied to a string is projected with a velocity of 10 m/s. Thebody starts whirling in a vertical circle. If the radius of the circle is 0.8 m, find the tension in the string when the body is at the top of the circle​

Explain, why is it difficult for a fireman to hold a hose, which ejects large amounts of water at a high velocity.​

Three particles A, B and C of equal mass, movewith equal speed v along the medians of anequilateral triangle as shown in figure. They collideat the centroid G of the triangle. After collision Acomes to rest and B retraces its path with speedv. What is the speed of C after collision?​

State any four applications of geostationary satellites​

What do you mean by positive, negative and zero works?give oneexample ofeach.​

What is oxidation and reaction​

Write ditels note on error in major​

7. A wire of resistance R is cut into five equal pieces. These five pieces of wire are then connectedin parallel. If the resultant resistance of this combination is Rs. What is the ratio of R/R,? ​

Pls solve it plss solve iy​

The Centripetal force of 45N is required to revolve a stone of 100g along a circular path of radius 50 cm .Find the constant speed of the stone. ​

MARK as BRAINLIEST THANKS

An electric iron of 1500 W is used for 20 minutes every day, find electric energyconsumed in themonth of April.​

Pls solve it plss solve​

An object is placed at 45 cm in front of converging mirror ( CONVEX MIRROR ) of radius of curvation 30cm. At what distance the image would be formed. Mention the nature of the image ( BY EXPLANATION )PLEASE DON'T GIVE ANY BAD ANSWERSIF YOU DO IT LIKE THAT I WILL REPORT ANSWER​

Formula to find average valocity.​

What is conservative and non-conservativeforce? describe with an example.​

A bus travels 54 km in 90 minutes. What is the speed of the bus? in seconds

Please tell the answer! ​

Pls solve it poora kra​

QUİCKLY PLEASEEE HELPX:180NY:?

State the Hooke's law. ​

What do you mean by VIBGYOR​

The distance travelled by an object in a specified direction is :a)speed​b)displacementc)velocityd)acceleration​​

b) displacement

(c) Calculate the magnifying power of a lens of power+ 20 dioptre, when the image of an object is formed by theens at least distance of distinct vision.23. (a) A candle is placed at 90 cm apart from a screen​

Explain the scalar product of two vectors. Mention it's any two properties.​

Answer:

Definition:-

Properties:-

Would electrons move from higher potential to lower potential or vice versa?What about proton?​

A man of mass 50 kg carries a bag of we500 N on his shoulder. The force with whichfloor pushes up his feet will be (g = 9.8 m/s​

Answer :-

Step-by-step EXPLANATION:

HELP ME PLEASEX:180NY:?

Correct Question :-

Answer :-

Hope this is helpful for you.

Define wave layouts??​

20. What is the pressure on a swimmer 10m below the surface of a lake? Atmospheric pressure is101x105 Pa. Taking density of water 1000 kg/m3.​

compare the time period of two pendulum such that the value of gravity on moon is 1.6 m^-2 that on earth in 9.8ms^-2

How to solve this above question

4. What does the path of an objectlook like when it is in uniformmotion?s

What is meant by poltergeists???please explainno copied answers

How many images are formed when an object is between two Mirrors whose reflecting surfaces are inclined act and angle of °1. 90°2. 60°3. 45°

12 The end A of uniform rod AB of length 1m is maintained at 100°C and the end B at 10°C. Thetemperature a' a distance of 60cm from the end B is

Speed of longitudinal waves depends on

What if octopuses are from europa???only quality answers needed

State law of conservation of Momentum

Velocity of a projectile becomes2 times of initial velocity when it'svelocity makeshorizontal Then what will be theangle of projectionmakes 30angle with

A car starts from rest with constant acceleration covering a distance of 1200m in 40s. Calculate its velocity at this time.

What is an octopus??are they aliens??? are octopuses from europa?????no copied answers please

1. ASSERTION: No particle may have a speed as large as speed of light.REASON: Infinite energy of any substance is not possible.

How many images are formed when an object is between two Mirrors whose reflecting surface are inclined at an angle of °1. 90°2. 60°3. 45°NOTE :-DON'T GIVE INVALID ANSWER

How can privent the corrossion

A bucket containing water is tied to one end of a rope 5 m long and it is rotated in avertical circle about the other end. Find the number of rotations per minute in order that the water in the bucket may not spill.

State and prove Bernoulli's theorem for a non-viscous liquid.

A body weighing 0.5 kg tied to a string is projected with a velocity of 10 m/s. Thebody starts whirling in a vertical circle. If the radius of the circle is 0.8 m, find the tension in the string when the body is at the top of the circle

Explain, why is it difficult for a fireman to hold a hose, which ejects large amounts of water at a high velocity.

Three particles A, B and C of equal mass, movewith equal speed v along the medians of anequilateral triangle as shown in figure. They collideat the centroid G of the triangle. After collision Acomes to rest and B retraces its path with speedv. What is the speed of C after collision?

State any four applications of geostationary satellites

What do you mean by positive, negative and zero works?give oneexample ofeach.

What is oxidation and reaction

Write ditels note on error in major

7. A wire of resistance R is cut into five equal pieces. These five pieces of wire are then connectedin parallel. If the resultant resistance of this combination is Rs. What is the ratio of R/R,?

Pls solve it plss solve iy

The Centripetal force of 45N is required to revolve a stone of 100g along a circular path of radius 50 cm .Find the constant speed of the stone.

An electric iron of 1500 W is used for 20 minutes every day, find electric energyconsumed in themonth of April.

Pls solve it plss solve

An object is placed at 45 cm in front of converging mirror ( CONVEX MIRROR ) of radius of curvation 30cm. At what distance the image would be formed. Mention the nature of the image ( BY EXPLANATION )PLEASE DON'T GIVE ANY BAD ANSWERSIF YOU DO IT LIKE THAT I WILL REPORT ANSWER

Formula to find average valocity.

What is conservative and non-conservativeforce? describe with an example.

Please tell the answer!

Pls solve it poora kra

State the Hooke's law.

What do you mean by VIBGYOR

The distance travelled by an object in a specified direction is :a)speedb)displacementc)velocityd)acceleration

(c) Calculate the magnifying power of a lens of power+ 20 dioptre, when the image of an object is formed by theens at least distance of distinct vision.23. (a) A candle is placed at 90 cm apart from a screen

Explain the scalar product of two vectors. Mention it's any two properties.

Would electrons move from higher potential to lower potential or vice versa?What about proton?

A man of mass 50 kg carries a bag of we500 N on his shoulder. The force with whichfloor pushes up his feet will be (g = 9.8 m/s

Define wave layouts??

20. What is the pressure on a swimmer 10m below the surface of a lake? Atmospheric pressure is101x105 Pa. Taking density of water 1000 kg/m3.