67486 + Interview Questions in Secondary School in Physics

1.	Write any four small units to measure length?
Answer» INCH (25.4 MM) foot (12 INCHES, 0.3048 m) YARD (3 feet, 0.9144 m) (TERRESTRIAL) mile (5280 feet, 1609.344 m)

Discussion

2.	A train 100 m long is moving with the velocity of 72 km/h. Find the time it takes to cross the bridge which is 2 km long?a) 1050 sb) 10500 sc) 10.5 sd) 105 s
Answer» Answer: TIME taken by the train to cross the BRIDGE is 0. 015 hours or 55 seconds Explanation: please give thank and please mark as brilliant

2.

A train 100 m long is moving with the velocity of 72 km/h. Find the time it takes to cross the bridge which is 2 km long?a) 1050 sb) 10500 sc) 10.5 sd) 105 s

Answer»

Answer:

TIME taken by the train to cross the BRIDGE is 0. 015 hours or 55 seconds

Explanation:

please give thank and please mark as brilliant

Discussion

3.	DimensionsQ4) Dimensions of Boltzmann’s Constant is_________. Given, Boltzmann’s Constant= 1.38 x 10-23 m2 kg s-2 K-1Q5) Dimensional Formulae of the Universal Gravitational Constant.Q6) Dimensional Formulae of the Thermal Conductivity k Given relation, Q= kA(θ2−θ1)t.Q7) Dimensional Formulae for surface tension S. Given, S = p g r h/2Q8) Find the Dimensions of the Potential and then the Capacitance. Given, E= Vit and Q= CVQ9) The Dimensions [ML-1T-2] may correspond to_______.Q10) The time dependence of a physical quantity P is given by P = P0 e-at^2 Where a is a constant; t is time. The constant a isa) Dimensionlessb) Has dimensions of Pc) Has dimensions of [T]-2d) Has dimensions of [T]2
Answer» haila ITNA BADA QUESTION cheyy 5+5=10

3.

DimensionsQ4) Dimensions of Boltzmann’s Constant is___. Given, Boltzmann’s Constant= 1.38 x 10-23 m2 kg s-2 K-1Q5) Dimensional Formulae of the Universal Gravitational Constant.Q6) Dimensional Formulae of the Thermal Conductivity k Given relation, Q= kA(θ2−θ1)t.Q7) Dimensional Formulae for surface tension S. Given, S = p g r h/2Q8) Find the Dimensions of the Potential and then the Capacitance. Given, E= Vit and Q= CVQ9) The Dimensions [ML-1T-2] may correspond to_.Q10) The time dependence of a physical quantity P is given by P = P0 e-at^2 Where a is a constant; t is time. The constant a isa) Dimensionlessb) Has dimensions of Pc) Has dimensions of [T]-2d) Has dimensions of [T]2

Answer»

haila ITNA BADA QUESTION

cheyy

5+5=10

Discussion

4.	Sabine in his experiment on reverberation time used organ pipe of a frequency---- Hz
Answer» Answer: 20Hz to 20 kHz. *Mark* me as *brainlliset*.

4.

Sabine in his experiment on reverberation time used organ pipe of a frequency---- Hz

Answer»

Answer:

20Hz to 20 kHz.

Mark me as brainlliset.

Discussion

5.	The winds are produced due to-
Answer» Answer: the WINDS are produced DUE to CHANGE in TEMPERATURE

5.

The winds are produced due to-

Answer»

Answer:

the WINDS are produced DUE to CHANGE in TEMPERATURE

Discussion

6.	A particle starting from rest, then uniformly accelerated distance x in first two seconds and a distancey in next two seconds, thenA) y = xB) y = 2xC) y = 3xD) y = 4xE) y = 9x
Answer» uhsk kevCn zihznz Ohabsvz

Discussion

7.	During decay of current in series LR circuit vacurrent i at time t= 0 isA) isB) 2isC) itD) 0
Answer» ANSWER: i don't KNOW the answer ACTUALLY KINDLY FORGIVE me

7.

During decay of current in series LR circuit vacurrent i at time t= 0 isA) isB) 2isC) itD) 0

Answer»

ANSWER:

i don't KNOW the answer ACTUALLY KINDLY FORGIVE me

Discussion

8.	What is the relation between the buoyancy experienced by the stone and wieght of water displaced by it
Answer» Answer: An object will float if the buoyancy FORCE exerted on it by the fluid balances its weight, i.e. if FB=mg F B = mg . But the ARCHIMEDES PRINCIPLE states that the BUOYANT force is the weight of the fluid displaced. So, for a FLOATING object on a liquid, the weight of the displaced liquid is the weight of the object.

8.

What is the relation between the buoyancy experienced by the stone and wieght of water displaced by it

Answer»

Answer:

An object will float if the buoyancy FORCE exerted on it by the fluid balances its weight, i.e. if FB=mg F B = mg . But the ARCHIMEDES PRINCIPLE states that the BUOYANT force is the weight of the fluid displaced. So, for a FLOATING object on a liquid, the weight of the displaced liquid is the weight of the object.

Discussion

9.	show that the acceleration due to gravity of a free falling body is independent of the mass of the body
Answer» ANSWER: as both forces are equal => g=Gr2M which is DEPENDENT of two MASS (m) of BODY

9.

show that the acceleration due to gravity of a free falling body is independent of the mass of the body

Answer»

ANSWER:

as both forces are equal => g=Gr2M which is DEPENDENT of two MASS (m) of BODY

Discussion

10.	State Ohm's law. Mention the factors on which the resistance of a conductordepend
Answer»

Discussion

11.	Velocity of sound at 0c is 332 m/s.at which temperture will the velocity of sound is 664m/s
Answer» ANSWER: HOPE this answer HELPED you.

11.

Velocity of sound at 0c is 332 m/s.at which temperture will the velocity of sound is 664m/s

Answer»

ANSWER:

HOPE this answer HELPED you.

Discussion

12.	A farmar moves along the boundary of a square field of side 10m in 40s. What will be the magnitude of displacement of the farmer at the end of 2minutes 20 second from his intial position
Answer» yr i nsta PAR AA JAO AmanRatan7513 ok Answer: Explanation:

12.

A farmar moves along the boundary of a square field of side 10m in 40s. What will be the magnitude of displacement of the farmer at the end of 2minutes 20 second from his intial position

Answer»

yr i nsta PAR AA JAO AmanRatan7513 ok

Answer:

Explanation:

Discussion

13.	If a ray of incident perpendicular to a reflecting surface, then *A. I =0°,r = 90°B.. I =90°,r = 90°C. I =0°,r = 0°D. I =90°,r = 0°
Answer» Answer: B. is the answer HOPE OT helps U

13.

If a ray of incident perpendicular to a reflecting surface, then *A. I =0°,r = 90°B.. I =90°,r = 90°C. I =0°,r = 0°D. I =90°,r = 0°

Answer»

Answer:

B. is the answer

HOPE OT helps U

Discussion

14.	Thomas model of an atom is called______?
Answer» Explanation: Popularly known as the PLUM pudding model, it had to be abandoned (1911) on both theoretical and experimental grounds in favour of the Rutherford atomic model, in which the electrons describe ORBITS about a TINY POSITIVE NUCLEUS. ...

14.

Thomas model of an atom is called______?

Answer»

Explanation:

Popularly known as the PLUM pudding model, it had to be abandoned (1911) on both theoretical and experimental grounds in favour of the Rutherford atomic model, in which the electrons describe ORBITS about a TINY POSITIVE NUCLEUS. ...

Discussion

15.	Velocity of sound at 0c is 332 m/s.at which temperture will the velocity of sound is 664m/s?
Answer» ANSWER: xigdrsursiraril hdgoairztzjvjfitsira4hpfycjglhdura74dph

15.

Velocity of sound at 0c is 332 m/s.at which temperture will the velocity of sound is 664m/s?

Answer»

ANSWER:

xigdrsursiraril hdgoairztzjvjfitsira4hpfycjglhdura74dph

Discussion

16.	The 1.2-Mg Mine Car Is Being Pulled By The Winch M Mounted On The Car. If The Winch Exerts A Force Of F = (150 ) N On The Cable, Where T Is In Seconds, Determine The Power Output Of The Winch When T= 5 S, Starting From Rest.
Answer» Answer: USING the concept of bond polarity and SOLUBILITY, explain why water (H2O) and vinegar are MISCIBLE, but vinegar and OIL are IMMISCIBLE.

16.

The 1.2-Mg Mine Car Is Being Pulled By The Winch M Mounted On The Car. If The Winch Exerts A Force Of F = (150 ) N On The Cable, Where T Is In Seconds, Determine The Power Output Of The Winch When T= 5 S, Starting From Rest.

Answer»

Answer:

USING the concept of bond polarity and SOLUBILITY, explain why water (H2O) and

vinegar are MISCIBLE, but vinegar and OIL are IMMISCIBLE.

Discussion

17.	The length of mental rod at 0'C is 1m.if it is heated to 100'C then it's length becoms 1.02m then the coefficient of linear expansion is
Answer» Answer: hi Explanation: The length of MENTAL ROD at 0'C is 1m.if it is heated to 100'C then it's length becoms 1.02m then the coefficient of LINEAR expansion isk Hf SAMSUNG tfdhxhdgxj

17.

The length of mental rod at 0'C is 1m.if it is heated to 100'C then it's length becoms 1.02m then the coefficient of linear expansion is

Answer»

Answer:

hi

Explanation:

The length of MENTAL ROD at 0'C is 1m.if it is heated to 100'C then it's length becoms 1.02m then the coefficient of LINEAR expansion isk Hf SAMSUNG tfdhxhdgxj

Discussion

18.	Microphones are 1) active transder2)passive transduer3) amplifier4)rectifier
Answer» Answer: it is an ACTIVE transducer mark me BRAINLIEST please i HOPE this helps

18.

Microphones are 1) active transder2)passive transduer3) amplifier4)rectifier

Answer»

Answer:

it is an ACTIVE transducer

mark me BRAINLIEST please i HOPE this helps

Discussion

19.	A sound of wave length 0.6 cm is traveling in air with a velocity of 300 m/s is this sound audible
Answer» ANSWER: Solution From the RELATON u=vlamda, the frequency of the WAVE is This is MUCH above the AUDIBLE range. It is an ultrasonic wave and will not be audible.

19.

A sound of wave length 0.6 cm is traveling in air with a velocity of 300 m/s is this sound audible

Answer»

ANSWER:

Solution

From the RELATON u=vlamda, the frequency of the WAVE is

This is MUCH above the AUDIBLE range. It is an ultrasonic wave and will not be audible.

Discussion

20.	An important difference between alternating generators and direct generators is
Answer» Answer ❤️ AC generator has slip rings while DC generators has a commutator. AC generator has slip ring is an ELECTROMECHANICAL device that allows the TRANSMISSION of power and electrical SIGNALS from a stationary to a rotating structure. hope help you brainlist please ❤️ uff

20.

An important difference between alternating generators and direct generators is

Answer»

Answer ❤️

AC generator has slip rings while DC generators has a commutator. AC generator has slip ring is an ELECTROMECHANICAL device that allows the TRANSMISSION of power and electrical SIGNALS from a stationary to a rotating structure.

hope help you

brainlist please ❤️ uff

Discussion

21.	If a ray of incident perpendicular to a reflecting surface, then the angle formed is
Answer» ANSWER: ANGLE of REFRACTION

21.

If a ray of incident perpendicular to a reflecting surface, then the angle formed is

Answer»

ANSWER:

ANGLE of REFRACTION

Discussion

22.	Write the mathematical formula of Newton's second law of motion
Answer» Newton's SECOND law of motion is F = ma, or force is equal to mass TIMES acceleration. PLEASE follow and MARK me as brainalist

22.

Write the mathematical formula of Newton's second law of motion

Answer»

Newton's SECOND law of motion is F = ma, or force is equal to mass TIMES acceleration.

PLEASE follow and MARK me as brainalist

Discussion

23.	In 240 years ,a radioactive material remain 1/16th of its initial value find half life and decay constant of radioactive material
Answer» ACTIVITY of radioactive substance at any time t is GIVEN by ⇒N=N 0 e −λt given that N 0 N = 16 1 at time t=40days ⇒ 16 1 =e −40λ ⇒e 40λ =16 ⇒λ= 40 ln16 we KNOW that t 2 1 = λ ln2 after putting the value of λ in above equation ⇒t 2 1 = ln16 ln2 ×40=10 This is the right ANSWER for your question.

23.

In 240 years ,a radioactive material remain 1/16th of its initial value find half life and decay constant of radioactive material

Answer»

ACTIVITY of radioactive substance at any time t is GIVEN by

⇒N=N

0

e

−λt

given that

N

0

N

=

16

1

at time t=40days

⇒

16

1

=e

−40λ

⇒e

40λ

=16

⇒λ=

40

ln16

we KNOW that

t

2

1

=

λ

ln2

after putting the value of λ in above equation

⇒t

2

1

=

ln16

ln2

×40=10

This is the right ANSWER for your question.

Discussion

24.	Velocity (m/s)26810time (seconds)) Find the acceleration dunng the first 4 seconds of motionFind the average velocity during the first 4 seconds of motion() Find the average speed of the car over the 10 seconds
Answer» ANSWER: i don't KNOW the answer ACTUALLY KINDLY FORGIVE me

24.

Velocity (m/s)26810time (seconds)) Find the acceleration dunng the first 4 seconds of motionFind the average velocity during the first 4 seconds of motion() Find the average speed of the car over the 10 seconds

Answer»

ANSWER:

i don't KNOW the answer ACTUALLY KINDLY FORGIVE me

Discussion

25.	The Potential Energy acquired by a coconut on the top of a coconut tree is due to itsposition. Write down two other situations in which objects acquired potential energy.
Answer» ANSWER: MANGO FALLING from TREE

25.

The Potential Energy acquired by a coconut on the top of a coconut tree is due to itsposition. Write down two other situations in which objects acquired potential energy.

Answer»

ANSWER:

MANGO FALLING from TREE

Discussion

26.	Name the galaxy in which our solar system found.
Answer» $\huge{\tt{\red{}\green{A}\purple{N}\pink{S}\blue{W}\orange{E}\red{R}}}☘$ MILKY WAY.

26.

Name the galaxy in which our solar system found.

Answer»

$\huge{\tt{\red{}\green{A}\purple{N}\pink{S}\blue{W}\orange{E}\red{R}}}☘$

MILKY WAY.

Discussion

27.	Group velocity (v) is given by ------------
Answer» ANSWER: The VELOCITY of an object is given by the equation v(t)=√4+t, where the velocity v is measured in ms, the TIME t is measured in SECONDS.

27.

Group velocity (v) is given by ------------

Answer»

ANSWER:

The VELOCITY of an object is given by the equation v(t)=√4+t, where the velocity v is measured in ms, the TIME t is measured in SECONDS.

Discussion

28.	The nodes and antinodes are separated by distance
Answer» Answer: Nodes and ANTINODES are KNOWN to form STATIONARY waves. In a given stationary wave, the distance between any given two successive nodes is half the WAVELENGTH. The approximate distance between a node and the immediate next ANTINODE is actually one-fourth of a given wavelength.

28.

The nodes and antinodes are separated by distance

Answer»

Answer:

Nodes and ANTINODES are KNOWN to form STATIONARY waves. In a given stationary wave, the distance between any given two successive nodes is half the WAVELENGTH. The approximate distance between a node and the immediate next ANTINODE is actually one-fourth of a given wavelength.

Discussion

29.	PEPanuto: Punan ng wastong salita ang mga patlang. Piliin ang sagot sa loob ng kahon.Isulat ang sagot sa sagutang papel.Ang(1.) ay maaaring mabuo sa pamamagitan ng kombinasyon ng(2.) at(3.) na galaw. Higit itong kinagigiliwan kapag ito ay sabay-sabay na ginagawa sa saliw ng(4.).Ang palagiang pagsayaw ay may dulot na maganda sa kalusugan dahil napauunlad nito ang(5.) ng isang taokabilang na rito ang koordinasyon ng katawan.tugtuginLokomotordi-lokomotorPhysical fitnesslikhang sayaw
Answer» Explanation: A function definition has two PRINCIPAL COMPONENTS: the FIRST line (including the argument DECLARATIONS), and the so-called body of the function.

29.

PEPanuto: Punan ng wastong salita ang mga patlang. Piliin ang sagot sa loob ng kahon.Isulat ang sagot sa sagutang papel.Ang(1.) ay maaaring mabuo sa pamamagitan ng kombinasyon ng(2.) at(3.) na galaw. Higit itong kinagigiliwan kapag ito ay sabay-sabay na ginagawa sa saliw ng(4.).Ang palagiang pagsayaw ay may dulot na maganda sa kalusugan dahil napauunlad nito ang(5.) ng isang taokabilang na rito ang koordinasyon ng katawan.tugtuginLokomotordi-lokomotorPhysical fitnesslikhang sayaw

Answer»

Explanation:

A function definition has two PRINCIPAL COMPONENTS: the FIRST line (including the argument DECLARATIONS), and the so-called body of the function.

Discussion

30.	For a bar magnet the value 9f B axis is 0.5x10x10x10x10T.its value for B eq will be
Answer» ANSWER: dhfigpgofifogovigigkvjivipbi

30.

For a bar magnet the value 9f B axis is 0.5x10x10x10x10T.its value for B eq will be

Answer»

ANSWER:

dhfigpgofifogovigigkvjivipbi

Discussion

31.	3) Read the following question andselect correct optionA force fis given by F= at +bt2Where t is time. What are the dimensions of a and b?A) (L'M'T-J and [Z'M'T-"B)(L'M'T-3) and (Z'MPT"CLM'T-] and [Z'M'T')D) L'M'T- and [L MT-*
Answer» ANSWER: CLM'T-] and [Z'M'T') EXPLANATION: CORRECT answer HOPE it HELPS you

31.

3) Read the following question andselect correct optionA force fis given by F= at +bt2Where t is time. What are the dimensions of a and b?A) (L'M'T-J and [Z'M'T-"B)(L'M'T-3) and (Z'MPT"CLM'T-] and [Z'M'T')D) L'M'T- and [L MT-*

Answer»

ANSWER:

CLM'T-] and [Z'M'T')

EXPLANATION:

CORRECT answer HOPE it HELPS you

Discussion

32.	A bird flies 6 km towards east, and then flies 8 km towards north. If the magnitude of its average velocity for the entire motion is 15 m/s, find its average speed during this period.
Answer» 21 m/s Explanation: here displacement = SQRT( 8^2+6^2)=10 time taken= 10/15=2/3 s average speed=distance travelled / time taken distance travelled= 6+8=14 m avg speed= 14/(2/3)=14*3/2=21 m/s

32.

A bird flies 6 km towards east, and then flies 8 km towards north. If the magnitude of its average velocity for the entire motion is 15 m/s, find its average speed during this period.

Answer»

21 m/s

Explanation:

here displacement = SQRT( 8^2+6^2)=10

time taken= 10/15=2/3 s

average speed=distance travelled / time taken

distance travelled= 6+8=14 m

avg speed= 14/(2/3)=14*3/2=21 m/s

Discussion

33.	A car moving at 0.5m/s increases its speed to 3.5m/s in 4 seconds.calculate its acceleration
Answer» Answer: 0.75 Explanation: A=V-U/T 3.5-0.5/4 = 3/4 or, 0.75

33.

A car moving at 0.5m/s increases its speed to 3.5m/s in 4 seconds.calculate its acceleration

Answer»

Answer:

0.75

Explanation:

A=V-U/T

3.5-0.5/4

= 3/4 or, 0.75

Discussion

34.	The velocity disribution curve of the advancing liquid in capillary tube is
Answer» ANSWER: HENCE the DISTRIBUTION is parabolic. Explanation: MARK me as BRAINLIEST

34.

The velocity disribution curve of the advancing liquid in capillary tube is

Answer»

ANSWER:

HENCE the DISTRIBUTION is parabolic.

Explanation:

MARK me as BRAINLIEST

Discussion

35.	What is the relation between velocity, frequency and wavelength of a wave ?
Answer» ANSWER: A wave has a wavelength λ, which is the distance between adjacent IDENTICAL parts of the wave. The wave velocity and the wavelength are RELATED to the wave's FREQUENCY and period by vw=λT or vw=fλ. The time for one complete wave cycle is the period T. The number of WAVES per unit time is the frequency ƒ.

35.

What is the relation between velocity, frequency and wavelength of a wave ?

Answer»

ANSWER:

A wave has a wavelength λ, which is the distance between adjacent IDENTICAL parts of the wave. The wave velocity and the wavelength are RELATED to the wave's FREQUENCY and period by vw=λT or vw=fλ. The time for one complete wave cycle is the period T. The number of WAVES per unit time is the frequency ƒ.

Discussion

36.	An object thrown vertically upwards reaches a height of 7m and falls back what is the distance travelled by the object and its displacement
Answer» Answer: Distance = 7+7 = 14 m DISPLACEMENT = 0 because displacement = distance from FINAL position to INITIAL position

36.

An object thrown vertically upwards reaches a height of 7m and falls back what is the distance travelled by the object and its displacement

Answer»

Answer:

Distance = 7+7 = 14 m

DISPLACEMENT = 0 because

displacement = distance from FINAL position to INITIAL position

Discussion

37.	Define uniform and nonuniform motion
Answer» Answer: UNIFORM MOTION AND NON-UNIFORM MOTION:A body is SAID to be in uniform motion, if it travels equal distances in equal intervals of TIME. A body is said to have non-uniform motion, if it travels unequal distances in equal intervals of time. ... We can SAY that the motion is CALLED uniform motion.

37.

Define uniform and nonuniform motion

Answer»

Answer:

UNIFORM MOTION AND NON-UNIFORM MOTION:A body is SAID to be in uniform motion, if it travels equal distances in equal intervals of TIME. A body is said to have non-uniform motion, if it travels unequal distances in equal intervals of time. ... We can SAY that the motion is CALLED uniform motion.

Discussion

38.	Explain the properties of plane mirror
Answer» ANSWER: IMAGE FORMED is VIRTUAL

38.

Explain the properties of plane mirror

Answer»

ANSWER:

IMAGE FORMED is VIRTUAL

Discussion

39.	Pls answer this 10 points
Answer» ANSWER: hsheueueuuurgrghejjaiisudhdhdhdhhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhhdhdhrhrhffhhfhfhfhfhfhfhfhfhfhffhfhfhfuufufufufufufufufufuf Explanation: jejeueushyyey3gr6y3y6h64h7huuruuhhuhuhuhuruhrhutuuhujiiuuuuttrj

39.

Pls answer this 10 points

Answer»

ANSWER:

hsheueueuuurgrghejjaiisudhdhdhdhhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhhdhdhrhrhffhhfhfhfhfhfhfhfhfhfhffhfhfhfuufufufufufufufufufuf

Explanation:

jejeueushyyey3gr6y3y6h64h7huuruuhhuhuhuhuruhrhutuuhujiiuuuuttrj

Discussion

40.	Assertion (A) : The resistivity of the substance does not depend on the nature of thesubstance.(1)Reason (R) : The resistivity of the substance is the characteristics properties of the material.a. Both A and R are true and R is the correct explanation for A.b. Both A and R are true but R is not the correct explanation for A.c. A is true but R is false.d. A is false but R is true.
Answer» Answer: OPTION a is the CORRECT one. both A and R are TRUE and R is the correct explanation of A

40.

Assertion (A) : The resistivity of the substance does not depend on the nature of thesubstance.(1)Reason (R) : The resistivity of the substance is the characteristics properties of the material.a. Both A and R are true and R is the correct explanation for A.b. Both A and R are true but R is not the correct explanation for A.c. A is true but R is false.d. A is false but R is true.

Answer»

Answer:

OPTION a is the CORRECT one.

both A and R are TRUE and R is the correct explanation of A

Discussion

41.	the odometer of a car reads 1600 km at the start of a trip and 2100 km at the end of the trip . if the trip took 5 hr calculate the average speed of the car in km/hr and m/s
Answer» Answer: pehle AAP follow KRO FR ANSWERS

41.

the odometer of a car reads 1600 km at the start of a trip and 2100 km at the end of the trip . if the trip took 5 hr calculate the average speed of the car in km/hr and m/s

Answer»

Answer:

pehle AAP follow KRO FR ANSWERS

Discussion

42.	When charges are immersed in water, then Coulomb force between the charges(a) Increases (b) decreases (c) remains same (d) none of the above
Answer» ANSWER: REMAIN same because then COULOMB FORCE

42.

When charges are immersed in water, then Coulomb force between the charges(a) Increases (b) decreases (c) remains same (d) none of the above

Answer»

ANSWER:

REMAIN same because then COULOMB FORCE

Discussion

43.	Ongzizjuqm hii every one please answer this question
Answer» ANSWER: I can't UNDERSTAND this QUESTIONS

43.

Ongzizjuqm hii every one please answer this question

Answer»

ANSWER:

I can't UNDERSTAND this QUESTIONS

Discussion

44.	The blood output from the human cardiac is about 5X 10-3 m3/minute andradius of aorta is 10-2 m. find the average velocity of flow in the aorta.
Answer» Explanation: RATE of flow = Velocity × AREA Rate of flow = 5 × 10-³ m³/ min Radius = 10-² m Area = $5 \times {10}^{ - 3} = <klux>V</klux> \: \times \pi \: {( {10}^{ - 2} )}^{2}$ v = $5 \times {10}^{ - 3}/\pi \: {( {10}^{ - 2} )}^{2}$ v = $5 \times {10}^{ - 3}/ 3.14× {( {10}^{ - 2} )}^{2}$ v = 15.9 m/min

44.

The blood output from the human cardiac is about 5X 10-3 m3/minute andradius of aorta is 10-2 m. find the average velocity of flow in the aorta.

Answer»

Explanation:

RATE of flow = Velocity × AREA

Rate of flow = 5 × 10-³ m³/ min
Radius = 10-² m
Area =

$5 \times {10}^{ - 3} = <klux>V</klux> \: \times \pi \: {( {10}^{ - 2} )}^{2}$

v = $5 \times {10}^{ - 3}/\pi \: {( {10}^{ - 2} )}^{2}$

v = $5 \times {10}^{ - 3}/ 3.14× {( {10}^{ - 2} )}^{2}$

v = 15.9 m/min

Discussion

45.	A steel rod of length 2l, cross-sectional area A and mass M is set rotating in a horizontal plane about an axis passing through the centre. If Y is the Young’s modulus for steel, find the extension in the length of the rod.
Answer» ANSWER: no I am REALLY SORRY to HEAR from you SOON ❣️❣️❣️❣️❣️❣️❣️

45.

A steel rod of length 2l, cross-sectional area A and mass M is set rotating in a horizontal plane about an axis passing through the centre. If Y is the Young’s modulus for steel, find the extension in the length of the rod.

Answer»

ANSWER:

no I am REALLY SORRY to HEAR from you SOON ❣️❣️❣️❣️❣️❣️❣️

Discussion

46.	Swimming is possible due to_____?
Answer» EXPLANATION: UPWARD FORCES of WATER..

46.

Swimming is possible due to_____?

Answer»

EXPLANATION:

UPWARD FORCES of WATER..

Discussion

47.	B- Aball comes to a stop from an initial velocity of 0.600 m/s in a distance of only 2.00 mm. (a) Find the acceleration in 2 m/s and in multiples of  2  g g  9.80 m/s . (3 marks) (b) Calculate the stopping time. (3 marks) (c) If the stopping distance is 4.50 mm. What is the deceleration, expressed in multiples of g ? (3 marks)
Answer» Explanation: Given A ball comes to a stop from an INITIAL velocity of 0.600 m/s in a distance of only 2.00 mm. (a) Find the acceleration in m/s^2 and in multiples of  2  G g  9.80 m/s . (3 marks) (b) Calculate the stopping time. (3 marks) (c) If the stopping distance is 4.50 mm. What is the deceleration, expressed in multiples of g ? So given initial velocity u = 0.600 So the ball comes to a stop, v = 0 m/s So the distance is 2.00 m So x – xo = 2.00 x 10^-3 m So we have the equation of MOTION v^2 = u^2 + 2as Or a = v^2 – u^2 / 2s deceleration a = v^2 – u^2 / 2(x – xo) = 0 ^2 – (0.600)^2 / 2 (2.00 x 10^-3) = - 90 m / s^2 Now we need to find deceleration in multiples of g, so we have = mod a/g = 90 / 9.81 = 9.18 Now the stopping time will be x – xo = ½ (u + v)t Or t = 2 (x – xo) / u + v = 2(2.00 x 10^-3) / 0.600 + 0 = 6.67 x 10^-3 secs Now we have x – xo = 4.50 mm = 4.50 x 10^-3 m a = v^2 – u^2 / 2 (x – x0) = 0 – 0.600 / 2(4.50 x 10^-3 m) a = - 40 m/s^2 So in multiples of g we get a/g = 40 / 9.8 = 4.08 Reference link will be brainly.in/question/17064578

47.

B- Aball comes to a stop from an initial velocity of 0.600 m/s in a distance of only 2.00 mm. (a) Find the acceleration in 2 m/s and in multiples of  2  g g  9.80 m/s . (3 marks) (b) Calculate the stopping time. (3 marks) (c) If the stopping distance is 4.50 mm. What is the deceleration, expressed in multiples of g ? (3 marks)

Answer»

Explanation:

Given A ball comes to a stop from an INITIAL velocity of 0.600 m/s in a distance of only 2.00 mm. (a) Find the acceleration in m/s^2 and in multiples of  2  G g  9.80 m/s . (3 marks) (b) Calculate the stopping time. (3 marks) (c) If the stopping distance is 4.50 mm. What is the deceleration, expressed in multiples of g ?

So given initial velocity u = 0.600
So the ball comes to a stop, v = 0 m/s
So the distance is 2.00 m
So x – xo = 2.00 x 10^-3 m
So we have the equation of MOTION v^2 = u^2 + 2as
Or a = v^2 – u^2 / 2s
deceleration a = v^2 – u^2 / 2(x – xo)
= 0 ^2 – (0.600)^2 / 2 (2.00 x 10^-3)
= - 90 m / s^2
Now we need to find deceleration in multiples of g, so we have
= mod a/g
= 90 / 9.81
= 9.18
Now the stopping time will be
x – xo = ½ (u + v)t
Or t = 2 (x – xo) / u + v
= 2(2.00 x 10^-3) / 0.600 + 0
= 6.67 x 10^-3 secs
Now we have
x – xo = 4.50 mm
= 4.50 x 10^-3 m
a = v^2 – u^2 / 2 (x – x0)
= 0 – 0.600 / 2(4.50 x 10^-3 m)
a = - 40 m/s^2
So in multiples of g we get a/g = 40 / 9.8
= 4.08

Reference link will be

brainly.in/question/17064578

Discussion

48.	A spectral line of wavelength 5461 Å has a width of 10-4 Å. Evaluate the minimum time spent by the electron in the upper energy level.
Answer» Answer: spectral line of wavelength 5461Е has a width of 10−4Е. Evaluate the MINIMUM TIME spent by the ELECTRONS in the UPPER energy state. Explanation: please GIVE me 10 thanks

48.

A spectral line of wavelength 5461 Å has a width of 10-4 Å. Evaluate the minimum time spent by the electron in the upper energy level.

Answer»

Answer:

spectral line of wavelength 5461Е has a width of 10−4Е. Evaluate the MINIMUM TIME spent by the ELECTRONS in the UPPER energy state.

Explanation:

please GIVE me 10 thanks

Discussion

49.	Dífference abóut Sànctúríes and National Park
Answer» Explanation: Wildlife sanctuaries refer to an AREA which PROVIDES protection and favourable living conditions to the WILD animals. ... On the other hand, the national park provides protection to the entire set of the ecosystem, i.e. FLORA, fauna, landscape, etc. of that REGION.

49.

Dífference abóut Sànctúríes and National Park

Answer»

Explanation:

Wildlife sanctuaries refer to an AREA which PROVIDES protection and favourable living conditions to the WILD animals. ... On the other hand, the national park provides protection to the entire set of the ecosystem, i.e. FLORA, fauna, landscape, etc. of that REGION.

Discussion

50.	What coefficient of lenear expanssion? On which factordoes it depends? Give its dimension.
Answer» Answer: Alpha is the COEFFICIENT of linear expansion RISE in TEMPERATURE; original LENGTH; increase in length are the factors alpha=rise in length/ original length*rise in temperature.

50.

What coefficient of lenear expanssion? On which factordoes it depends? Give its dimension.

Answer»

Answer:

Alpha is the COEFFICIENT of linear expansion

RISE in TEMPERATURE; original LENGTH; increase in length are the factors

alpha=rise in length/ original length*rise in temperature.

Discussion

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