67486 + Interview Questions in Secondary School in Physics

1.	What is the definition of quantity
Answer» ANSWER: . a NUMBER or an AMOUNT of something किसी वस्‍तु का परिमाण (संख्‍या या मात्रा); बड़ी तादाद

1.

What is the definition of quantity

Answer»

ANSWER:

.

a NUMBER or an AMOUNT of something

किसी वस्‍तु का परिमाण (संख्‍या या मात्रा); बड़ी तादाद

Discussion

2.	Define conductance. state its si unit?
Answer» HII MATE here Ur Answer ☑️↓↓↓ Conductance in which electric current flows through a substance electrical conductance is MEASURED in siemens (S) Hope it's help Uh.... *Mark* me *brainliest* PLZ** ❤️✨❤️☑️

2.

Define conductance. state its si unit?

Answer»

HII MATE here Ur Answer ☑️↓↓↓

Conductance in which electric current flows through a substance

electrical conductance is MEASURED in siemens (S)

Hope it's help Uh....

Mark me brainliest PLZ ❤️✨❤️☑️

Discussion

3.	A 10 mm long pin is placed vertically in front of a concave mirror. A 5 mm long image of the pin is formed at 30 cm in front of the mirror. What is the focal length of this mirror ?
Answer» Answer: focal length is 20 cm Explanation: MAGNIFICATION is ratio of IMAGE HEIGHT to object height or image distance to object distance GET object distance through this and get focal length as is ratio of product of image and object distance to their sum

3.

A 10 mm long pin is placed vertically in front of a concave mirror. A 5 mm long image of the pin is formed at 30 cm in front of the mirror. What is the focal length of this mirror ?

Answer»

Answer:

focal length is 20 cm

Explanation:

MAGNIFICATION is ratio of IMAGE HEIGHT to object height or image distance to object distance GET object distance through this and get focal length as is ratio of product of image and object distance to their sum

Discussion

4.	Figure. Shows displacement - time curves I and II. What conclusions do you drawfrom these graphs?
Answer» 1 NON UNIFORM VELOCITY 2 uniform velocity with u=0

4.

Figure. Shows displacement - time curves I and II. What conclusions do you drawfrom these graphs?

Answer»

1 NON UNIFORM VELOCITY

2 uniform velocity with u=0

Discussion

5.	If a half wave rectified voltage is fed to a load resistor, which part of a cycle the load current will flowa)0-90°b)90°-180°c)0-180°d)0-360°
Answer» ANSWER: The answer is........ B)90°-180°

5.

If a half wave rectified voltage is fed to a load resistor, which part of a cycle the load current will flowa)0-90°b)90°-180°c)0-180°d)0-360°

Answer»

ANSWER:

The answer is........

B)90°-180°

Discussion

6.	Characteristics of concave mirror
Answer» Answer: Concave mirrors can PRODUCE both REAL and VIRTUAL IMAGES.

6.

Characteristics of concave mirror

Answer»

Answer:

Concave mirrors can PRODUCE both REAL and VIRTUAL IMAGES.

Discussion

7.	ABullet of mass 10 gram travelling horizontally with a velocity of 150 metre per second strikes a stationary wooden block and comes to rest in 0.03 second the distance of peniteration of the bullet into the block
Answer» Explanation: Answer:GIVEN, Mass of bullet, m = 10 g = 10/1000 KG = 0.01 kg Initial velocity of bullet, u = 150 m/s Since bullet comes to rest, thus final velocity, v =0 Time, t = 0.03 s Distance of penetration, i.e. Distance, covered (s)=? Magnitude of force exerted by wooden block =? we know that, $v = u + at \\ = 0 = 150ms { -}^{1} + a \times 0.03s \\ = - 150mps = a \times 0.03s \\ = a = - \frac{150mps}{0.03s} = - 5000ms - {}^{2}$ we know that, $s = ut + \frac{1}{2} at {}^{2} \\ = s = 150mps \times 0.03s + \frac{1}{2} ( - 5000ms - {}^{2} \\ = s = 4.5m - 2500ms - {}^{2} \times 0.0009s {}^{2} \\ = s = 4.5m - 2.25m \\ = s = 2.25m$ magnitude of force exerted by wooden block we know that, Force = mass x acceleration or, $f = 0.01kg \times - 5000ms {}^{ - 2} = - 50n$ Therefore, Penetration of bullet in wooden block = 2.25 m Force exerted by wooden block on bullet = – 50 N. Here NEGATIVE SIGN shows that force is exerted in the opposite direction of bullet. I hope this may help you pls mark as brainliest

7.

ABullet of mass 10 gram travelling horizontally with a velocity of 150 metre per second strikes a stationary wooden block and comes to rest in 0.03 second the distance of peniteration of the bullet into the block

Answer»

Explanation:

Answer:GIVEN, Mass of bullet, m = 10 g = 10/1000 KG = 0.01 kg

Initial velocity of bullet, u = 150 m/s

Since bullet comes to rest, thus final velocity, v =0

Time, t = 0.03 s

Distance of penetration, i.e. Distance, covered (s)=?

Magnitude of force exerted by wooden block =?

we know that,

$v = u + at \\ = 0 = 150ms { -}^{1} + a \times 0.03s \\ = - 150mps = a \times 0.03s \\ = a = - \frac{150mps}{0.03s} = - 5000ms - {}^{2}$

we know that,

$s = ut + \frac{1}{2} at {}^{2} \\ = s = 150mps \times 0.03s + \frac{1}{2} ( - 5000ms - {}^{2} \\ = s = 4.5m - 2500ms - {}^{2} \times 0.0009s {}^{2} \\ = s = 4.5m - 2.25m \\ = s = 2.25m$

magnitude of force exerted by wooden block

we know that, Force = mass x

acceleration

or,

$f = 0.01kg \times - 5000ms {}^{ - 2} = - 50n$

Therefore, Penetration of bullet in wooden block = 2.25 m

Force exerted by wooden block on bullet = – 50 N. Here NEGATIVE SIGN shows that force is exerted in the opposite direction of bullet.

I hope this may help you

pls mark as brainliest

Discussion

8.	Moving coil galvanometer (MCG) has 10 turns each of length12 cm and breadth 8 cm. The coil of M.C. G. carries a currentof 125uA and is kept perpendicular to the uniform magneticfield of induction 10 T. The twist constant of phosphor bronzefibre is 12x10 Nm/degree. Calculate the deflectionproduced
Answer» deflection produced is 10° Explanation: given data TURN = 10 LENGTH = 12 cm breadth = 8 cm CURRENT = 125 uA uniform magnetic field of induction = $10^{-2}$ T twist constant = 12 x $10^{-9}$ Nm/degree solution Current flowing through coil of MCG current I = $(\frac{c}{nBA} )\theta$ .................................1 so here $\theta$ will be $\theta$ = $(\frac{nBA}{c} )l$ put here VALUE we get $\theta$ = $\frac{10\times 10^{-2}\times 12 \times 10^{-2}\times 8 \times 10^{-2}\times 125 \times 10^{-6}}{12\times 10^{-9}}$ $\theta$ = 10° so deflection produced is 10° Learn more : current produce a deflection 1. brainly.in/question/13004528

8.

Moving coil galvanometer (MCG) has 10 turns each of length12 cm and breadth 8 cm. The coil of M.C. G. carries a currentof 125uA and is kept perpendicular to the uniform magneticfield of induction 10 T. The twist constant of phosphor bronzefibre is 12x10 Nm/degree. Calculate the deflectionproduced

Answer»

deflection produced is 10°

Explanation:

given data

TURN = 10

LENGTH = 12 cm

breadth = 8 cm

CURRENT = 125 uA

uniform magnetic field of induction = $10^{-2}$ T

twist constant = 12 x $10^{-9}$ Nm/degree

solution

Current flowing through coil of MCG

current I = $(\frac{c}{nBA} )\theta$ .................................1

so here $\theta$ will be

$\theta$ = $(\frac{nBA}{c} )l$

put here VALUE we get

$\theta$ = $\frac{10\times 10^{-2}\times 12 \times 10^{-2}\times 8 \times 10^{-2}\times 125 \times 10^{-6}}{12\times 10^{-9}}$

$\theta$ = 10°

so deflection produced is 10°

Learn more :

current produce a deflection

1. brainly.in/question/13004528

Discussion

9.	Please answer me and i make you in brain list
Answer» Answer: Hey Hi... Explanation: What is your QUESTION?? Ask your question then I will try to the answer... I hope are you understand... I'm from KARNATAKA... ಕನ್ನಡತಿ...

9.

Please answer me and i make you in brain list

Answer»

Answer:

Hey Hi...

Explanation:

What is your QUESTION??

Ask your question then I will try to the answer...

I hope are you understand...

I'm from KARNATAKA...

ಕನ್ನಡತಿ...

Discussion

10.	Why does modification of root occurs? write any two causes or use.
Answer» Modification in root occurs when there occurs a permanent change in the structure of the root system. Roots are modified into different FORMS to PERFORM specific functions other than their normal functions. Modification in roots is FOUND in both TAP root system and ADVENTITIOUS root system.

Discussion

11.	1) A solid metal sphere of volume 0.31misdropped in an ocean where water pressureis 2 x 10' N/m². Calculate the change in thevolume of the sphere if the bulk modulusof the metal is 6.1 x 1010 N/m².
Answer» HOPE..it..HELPS...MARK..me .brainliest..

11.

1) A solid metal sphere of volume 0.31misdropped in an ocean where water pressureis 2 x 10' N/m². Calculate the change in thevolume of the sphere if the bulk modulusof the metal is 6.1 x 1010 N/m².

Answer»

HOPE..it..HELPS...MARK..me

.brainliest..

Discussion

12.	What is this please answer the following
Answer» ANSWER: weighting device........ it is USED to CALCULATE WEIGHTS

12.

What is this please answer the following

Answer»

ANSWER:

weighting device........

it is USED to CALCULATE WEIGHTS

Discussion

13.	From the reactance and frequency graph given above the value of the inductance of the inductor is
Answer» Answer: XL = wL 2 = w L w = 2π f f = 50 L = XL/w L = 1/50π Bhai solve KAR KE dekho 6.37 × 10^-3 THANKS FOR READING

13.

From the reactance and frequency graph given above the value of the inductance of the inductor is

Answer»

Answer:

XL = wL

2 = w L

w = 2π f

f = 50

L = XL/w

L = 1/50π

Bhai solve KAR KE dekho

6.37 × 10^-3

THANKS FOR READING

Discussion

14.	What is a longitudial wave?answer fast itsmy exam!!
Answer» ANSWER: the answer is Explanation: longitudinal WAVE is a wave vibratting in the DIRECTION of propogation plz mark as BRAINLIEST

14.

What is a longitudial wave?answer fast itsmy exam!!

Answer»

ANSWER:

the answer is

Explanation:

longitudinal WAVE is a wave vibratting in the DIRECTION of propogation

plz mark as BRAINLIEST

Discussion

15.	Epa7 Cacao-delares condenaProhich Molen-thedig asamshocoingpoowoppetocelesolglicdogma
Answer» ANSWER: gshjgshghsjvgfuuvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhju Explanation:

15.

Epa7 Cacao-delares condenaProhich Molen-thedig asamshocoingpoowoppetocelesolglicdogma

Answer»

ANSWER:

gshjgshghsjvgfuuvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhjvhju

Explanation:

Discussion

16.	A bullet is moving with a velocity of 30 M per second fired buy a gun of mass 300 gram with = feet to metre per second find the mass of bullet
Answer» Answer: By Conservation of Law of momentum MV = MV V = 30m/s M = 300gram V = not MENTIONED in question Thanks for Reading

16.

A bullet is moving with a velocity of 30 M per second fired buy a gun of mass 300 gram with = feet to metre per second find the mass of bullet

Answer»

Answer:

By Conservation of Law of momentum

MV = MV

V = 30m/s

M = 300gram

V = not MENTIONED in question

Thanks for Reading

Discussion

17.	if the angular speed of rotation of an armature of AC generator is doubled , the induced emf will be
Answer» EXPLANATION: INDUCED EMF will ALSO DOUBLED

17.

if the angular speed of rotation of an armature of AC generator is doubled , the induced emf will be

Answer»

EXPLANATION:

INDUCED EMF will ALSO DOUBLED

Discussion

18.	A wave with a frequency of 500 Fttraveling at a speed of 200 ms. What is thewavelength?
Answer» Answer: 0.4 m Explanation: f = 500 FT = 152.4 m v = 200 m/s v=fl Thus, L = v/f = 200/152.4 = 0.4 m

18.

A wave with a frequency of 500 Fttraveling at a speed of 200 ms. What is thewavelength?

Answer»

Answer:

0.4 m

Explanation:

f = 500 FT = 152.4 m

v = 200 m/s

v=fl

Thus,

L = v/f = 200/152.4

= 0.4 m

Discussion

19.	Strength of materials is largely concerned with either internal and external forces anfld their intensities in materials. True or False
Answer» ANSWER: TRUE as these are the properties which MAKE them hard or soft

19.

Strength of materials is largely concerned with either internal and external forces anfld their intensities in materials. True or False

Answer»

ANSWER:

TRUE

as these are the properties which MAKE them hard or soft

Discussion

20.	Whataretheprecautionsactivitytaken in the focal lengthof the lens dependsmedium.on thesurrounding
Answer» Explanation: The reason behind this phenomenon is that the ANGLE of refraction of a lens is depended on the INDICES of refraction of the MEDIUM of lens and the incoming medium and the DIFFERENCE in their indices.

20.

Whataretheprecautionsactivitytaken in the focal lengthof the lens dependsmedium.on thesurrounding

Answer»

Explanation:

The reason behind this phenomenon is that the ANGLE of refraction of a lens is depended on the INDICES of refraction of the MEDIUM of lens and the incoming medium and the DIFFERENCE in their indices.

Discussion

21.	Characteristics of images form by convex lens pls answer fast
Answer» PROPERTIES of image formed by a convex LENS Convex lens converge PARALLEL rays COMING from objet at infinity and a highly diminished - point sized, real and INVERTED image is formed at principal focus F2. Properties of Image: Image is highly diminished, real and inverted.

21.

Characteristics of images form by convex lens pls answer fast

Answer»

PROPERTIES of image formed by a convex LENS

Convex lens converge PARALLEL rays COMING from objet at infinity and a highly diminished - point sized, real and INVERTED image is formed at principal focus F2. Properties of Image: Image is highly diminished, real and inverted.

Discussion

22.	The magnetic field at the centre of a current carrying circular loop is B. If the radius of the loopis doubled, keeping the current as same the magnetic field at the centre of the loop would be
Answer» Answer: At the center of a current CARRYING coil, the magnetic field INTENSITY is directly ... So, if the current is doubled and radius is halved, then the VALUE of B increases ...

22.

The magnetic field at the centre of a current carrying circular loop is B. If the radius of the loopis doubled, keeping the current as same the magnetic field at the centre of the loop would be

Answer»

Answer:

At the center of a current CARRYING coil, the magnetic field INTENSITY is directly ... So, if the current is doubled and radius is halved, then the VALUE of B increases ...

Discussion

23.	YSICO-PARUTHERMAL EXPANSIONThe length of the steel rod is som omiurid copper rods at any temperature. then lengths of steel and copper rods at 0 degree Celsius are (Alfa of steel =1.1×10^-5/degree Celsius steel rod is som longer than the copper rod at any temperature. Then IchC I 110 100 =17210 1")b) 917 cm, 14.17 cmd) 14 17 cm, 18.34 cm
Answer» ANSWER: ffwgegegeeeeyddyfsjdjsude

23.

YSICO-PARUTHERMAL EXPANSIONThe length of the steel rod is som omiurid copper rods at any temperature. then lengths of steel and copper rods at 0 degree Celsius are (Alfa of steel =1.1×10^-5/degree Celsius steel rod is som longer than the copper rod at any temperature. Then IchC I 110 100 =17210 1")b) 917 cm, 14.17 cmd) 14 17 cm, 18.34 cm

Answer»

ANSWER:

ffwgegegeeeeyddyfsjdjsude

Discussion

24.	Describe an experiment to show that air expends on heating.?
Answer» Answer: i) Take an empty bottle. Actually the empty bottle contains AIR. Attach a rubber balloon to its neck as shown in Figure. Initially, the balloon is deflated. (ii) Place the bottle in a water bath CONTAINING boiling water. After some time you will notice that the balloon gets INFLATED as shown in Figure. The reason is that the air INSIDE the bottle expands on heating and it fills the balloon.Read more on Sarthaks.com - https://www.sarthaks.com/165447/describe-an-experiment-to-show-that-air-expands-on-heating iii) Take the bottle out of the water bath and 7 allow it to cool by itself. We will notice that the balloon gets deflated and it collapses. This is because the air inside the balloon and the bottle, has CONTRACTED on cooling. The air from balloon passes to the bottle, so the balloon gets deflatedRead more on Sarthaks.com - https://www.sarthaks.com/165447/describe-an-experiment-to-show-that-air-expands-on-heating

24.

Describe an experiment to show that air expends on heating.?

Answer»

Answer:

i) Take an empty bottle. Actually the empty bottle contains AIR. Attach a rubber balloon to its neck as shown in Figure. Initially, the balloon is deflated.

(ii) Place the bottle in a water bath CONTAINING boiling water. After some time you will notice that the balloon gets INFLATED as shown in Figure. The reason is that the air INSIDE the bottle expands on heating and it fills the balloon.Read more on Sarthaks.com - https://www.sarthaks.com/165447/describe-an-experiment-to-show-that-air-expands-on-heating

iii) Take the bottle out of the water bath and 7 allow it to cool by itself. We will notice that the balloon gets deflated and it collapses. This is because the air inside the balloon and the bottle, has CONTRACTED on cooling. The air from balloon passes to the bottle, so the balloon gets deflatedRead more on Sarthaks.com - https://www.sarthaks.com/165447/describe-an-experiment-to-show-that-air-expands-on-heating

Discussion

25.	The resistors each of resistance 1 ohm is connected as shown in figure.The resultant resistance between A and B is
Answer» ANSWER: O. 167ohms Explanation: The resistors are all ARRANGED in parallel which are in SERIES with the LAST resistor

25.

The resistors each of resistance 1 ohm is connected as shown in figure.The resultant resistance between A and B is

Answer»

ANSWER:

O. 167ohms

Explanation:

The resistors are all ARRANGED in parallel which are in SERIES with the LAST resistor

Discussion

26.	What is thermal physics?
Answer» Answer: Thermal physics is the combined study of thermodynamics, STATISTICAL MECHANICS, and kinetic theory of gases. This umbrella-subject is typically designed for physics students and functions to PROVIDE a general INTRODUCTION to each of three core heat-related subjects. foloow me hope it hlps

26.

What is thermal physics?

Answer»

Answer:

Thermal physics is the combined study of thermodynamics, STATISTICAL MECHANICS, and kinetic theory of gases. This umbrella-subject is typically designed for physics students and functions to PROVIDE a general INTRODUCTION to each of three core heat-related subjects.

foloow me

hope it hlps

Discussion

27.	Pls anwer this 19 question
Answer» ANSWER: ZERO is the answer as TRANSPARENCY

27.

Pls anwer this 19 question

Answer»

ANSWER:

ZERO is the answer as TRANSPARENCY

Discussion

28.	Determination of Radius of curvature by spherometer
Answer» Answer: To find the radius CURVATURE of the spherical surface Place the spherometer on the concave surface so that its THREE legs rest on it. Gently turn the SCREW downwards till the screw tip just touches the concave surface. Note the reading of the circular disc scale which is in LINE with the vertical (pitch) scale.

28.

Determination of Radius of curvature by spherometer

Answer»

Answer:

To find the radius CURVATURE of the spherical surface

Place the spherometer on the concave surface so that its THREE legs rest on it. Gently turn the SCREW downwards till the screw tip just touches the concave surface. Note the reading of the circular disc scale which is in LINE with the vertical (pitch) scale.

Discussion

29.	Prove g=9.8m/s2 With the help of correct information
Answer» EXPLANATION: i HOPE this ANSWER is LOT of you

29.

Prove g=9.8m/s2 With the help of correct information

Answer»

EXPLANATION:

i HOPE this ANSWER is LOT of you

Discussion

30.	साद दालन मा कुरा हुई वस्तू काविल्यापन9-410 +1080हतो उवा आमा
Answer» Answer: 9-410+1080= -401+1080 679

30.

साद दालन मा कुरा हुई वस्तू काविल्यापन9-410 +1080हतो उवा आमा

Answer»

Answer:

9-410+1080=

-401+1080

679

Discussion

31.	4 rules of concave mirror
Answer» Explanation: They are: Any incident ray traveling parallel to the principal axis on the WAY to the mirror will pass through the FOCAL point UPON REFLECTION. Any incident ray passing through the focal point on the way to the mirror will travel parallel to the principal axis upon reflection

31.

4 rules of concave mirror

Answer»

Explanation:

They are: Any incident ray traveling parallel to the principal axis on the WAY to the mirror will pass through the FOCAL point UPON REFLECTION. Any incident ray passing through the focal point on the way to the mirror will travel parallel to the principal axis upon reflection

Discussion

32.	One kilogram force equals toa) 9.8 dyne b) 9.8 x 10^4 Nc) 98 x 10^4 dyne d) 980 dyne
Answer» Explanation: The kilogram-force is EQUAL to a mass of one kilogram multiplied by the STANDARD acceleration due to GRAVITY on EARTH, which is defined as exactly 9.80665 meter per second². Then one (1) kilogram-force is equal to 1 kg × 9.80665 meter per second² = 9.80665 kilogram × meter per second² = 9.80665 newton (1N).

32.

One kilogram force equals toa) 9.8 dyne b) 9.8 x 10^4 Nc) 98 x 10^4 dyne d) 980 dyne

Answer»

Explanation:

The kilogram-force is EQUAL to a mass of one kilogram multiplied by the STANDARD acceleration due to GRAVITY on EARTH, which is defined as exactly 9.80665 meter per second². Then one (1) kilogram-force is equal to 1 kg × 9.80665 meter per second² = 9.80665 kilogram × meter per second² = 9.80665 newton (1N).

Discussion

33.	How much force does water exert on the base of a house tank of base area1.5m²when it is filled with water up to a height of 1 m. if (g = 10 m/s²)plz answer it
Answer» $\mathfrak{ \huge{ \pink{ \underline{Answer}}}} \\ \\ \bigodot \: \bold{given} \\ \implies \: area \: of \: cross \: section = 1.5 {m}^{2} \\ \implies \: height \: of \: water \: column \: = 1m \\ \implies \: gravitational \: acceleraton = 10 \frac{m}{ {s}^{2} } \\ \bigodot \: \bold{to \: find} \\ \implies \: force \: exertes \: on \: base \: of \: water \: tank \\ \bigodot \: \bold{formula} \\ \implies \: pressure \: due \: to \: height = \blue{{ \rho}gh} \\ \implies \: \blue{force = pressure \times area} \\ \bigodot \: \bold{calculation} \\ \implies \: pressure = \rho \: gh \\ \implies \: p \: = 1000 \times 10 \times 1 \\ \implies \: p = {10}^{4} pa \\ \\ \implies \: force = p \times a \\ \implies \: f = {10}^{4} \times 1.5 newton\\ \\ \implies \: so \: force \: exertes \: on \: base \: of \: water \: tank \: is \: \boxed{ \pink{f = 1.5 \times {10}^{4}newton}}$

33.

How much force does water exert on the base of a house tank of base area1.5m²when it is filled with water up to a height of 1 m. if (g = 10 m/s²)plz answer it

Answer»

$\mathfrak{ \huge{ \pink{ \underline{Answer}}}} \\ \\ \bigodot \: \bold{given} \\ \implies \: area \: of \: cross \: section = 1.5 {m}^{2} \\ \implies \: height \: of \: water \: column \: = 1m \\ \implies \: gravitational \: acceleraton = 10 \frac{m}{ {s}^{2} } \\ \bigodot \: \bold{to \: find} \\ \implies \: force \: exertes \: on \: base \: of \: water \: tank \\ \bigodot \: \bold{formula} \\ \implies \: pressure \: due \: to \: height = \blue{{ \rho}gh} \\ \implies \: \blue{force = pressure \times area} \\ \bigodot \: \bold{calculation} \\ \implies \: pressure = \rho \: gh \\ \implies \: p \: = 1000 \times 10 \times 1 \\ \implies \: p = {10}^{4} pa \\ \\ \implies \: force = p \times a \\ \implies \: f = {10}^{4} \times 1.5 newton\\ \\ \implies \: so \: force \: exertes \: on \: base \: of \: water \: tank \: is \: \boxed{ \pink{f = 1.5 \times {10}^{4}newton}}$

Discussion

34.	How is food safe in the tin can then iron can ?
Answer» ANSWER: tin is least reactive than IRON so FOOD in tin is SAFE than iron

34.

How is food safe in the tin can then iron can ?

Answer»

ANSWER:

tin is least reactive than IRON so FOOD in tin is SAFE than iron

Discussion

35.	Difference between star and Planet 4 point
Answer» Stars are LUMINOUS celestial body. Stars are generally made up of hydrogen gases. PLANET.... Planet are spherical celestial body. It revolve around the sun in a FIXED orbit . EXPLANATION:

35.

Difference between star and Planet 4 point

Answer»

Stars are LUMINOUS celestial body.

Stars are generally made up of hydrogen gases.

PLANET....

Planet are spherical celestial body.

It revolve around the sun in a FIXED orbit .

EXPLANATION:

Discussion

36.	Why we use sharp knife to cut Fruit and Vegetables ?
Answer» Answer: we use SHARP knife to cut the fruit and VEGETABLES because we KNOW the area is inversely porpotional to pressure .the area of knife is LOW there fore the pressure is working more on fruits I hope this answer is enough for you

36.

Why we use sharp knife to cut Fruit and Vegetables ?

Answer»

Answer:

we use SHARP knife to cut the fruit and VEGETABLES because we KNOW the area is inversely porpotional to pressure .the area of knife is LOW there fore the pressure is working more on fruits

I hope this answer is enough for you

Discussion

37.	What would happen if chemical equations are not balanced ?
Answer» Answer: MAY this HELP you....... PLEASE mark me as BRAINLIST .....and follow me please........

37.

What would happen if chemical equations are not balanced ?

Answer»

Answer:

MAY this HELP you.......

PLEASE mark me as BRAINLIST .....and follow me please........

Discussion

38.	An object is placed at a distance of 20cm before a convex mirror whose focal length is 20cm. Then the image distance is
Answer» ANSWER: infinity EXPLANATION: when an object is PLACED on FOCUS then the image formed at infinity

38.

An object is placed at a distance of 20cm before a convex mirror whose focal length is 20cm. Then the image distance is

Answer»

ANSWER:

infinity

EXPLANATION:

when an object is PLACED on FOCUS then the image formed at infinity

Discussion

39.	If we travel at the speed of light what will be happen to us?
Answer» ANSWER: hey! If we will TRAVEL at the speed of light then our BODY get STARTS burning because of the frictional force with the AIR . hope it will be helpful ✌️

39.

If we travel at the speed of light what will be happen to us?

Answer»

ANSWER:

hey!

If we will TRAVEL at the speed of light then our BODY get STARTS burning because of the frictional force with the AIR .

hope it will be helpful ✌️

Discussion

40.	Two masses m1 and m2 are connected by massless flexible and inextensible string passed over massless and frictionless pulley the acceleration of center of mass is
Answer» Answer: Explanation: first find acceleration of each bodies . as M1 > m2 so m1 moves downward while m2 moves upward direction with same acceleration a. for mass m1, downward force - upward force = Net force or, m1g - T = m1a.......(1) for mass m2 upward force - downward force = net force or, T - m2g = m2a .......(2) adding equations (1) and (2), we GET, (m1 - m2)g = (m1 + m2)a or, a = (m1 - m2)g/(m1 + m2) HENCE, magnitude of acceleration of each BODY is a = (m1 - m2)g/(m1 + m2) but directions are just opposite. now, acceleration of centre of mass ; acm = (m1a1 + m2a2)/(m1 + m2) = [m1(m1 - m2)g/(m1 + m2) + m2{-(m1 - m2)g/(m1 + m2)}]/(m1 + m2) = [(m1 - m2)/(m1 + m2)]²g hence , acceleration of centre of mass is [(m1 - m2)/(m1 + m2)]² g Read more on Brainly.in - brainly.in/question/12230741#readmore

40.

Two masses m1 and m2 are connected by massless flexible and inextensible string passed over massless and frictionless pulley the acceleration of center of mass is

Answer»

Answer:

Explanation:

first find acceleration of each bodies .

as M1 > m2 so m1 moves downward while m2 moves upward direction with same acceleration a.

for mass m1,

downward force - upward force = Net force

or, m1g - T = m1a.......(1)

for mass m2

upward force - downward force = net force

or, T - m2g = m2a .......(2)

adding equations (1) and (2),

we GET, (m1 - m2)g = (m1 + m2)a

or, a = (m1 - m2)g/(m1 + m2)

HENCE, magnitude of acceleration of each BODY is a = (m1 - m2)g/(m1 + m2) but directions are just opposite.

now, acceleration of centre of mass ;

acm = (m1a1 + m2a2)/(m1 + m2)

= [m1(m1 - m2)g/(m1 + m2) + m2{-(m1 - m2)g/(m1 + m2)}]/(m1 + m2)

= [(m1 - m2)/(m1 + m2)]²g

hence , acceleration of centre of mass is [(m1 - m2)/(m1 + m2)]² g

Read more on Brainly.in - brainly.in/question/12230741#readmore

Discussion

41.	Determine the co-ordinate of centre of mass of the two particles system
Answer» Explanation: The CENTRE of mass (CoM) is the POINT RELATIVE to the SYSTEM of particles in an OBJECT. This is that point of the system of particles that embarks the average position of the system in relation to the mass of the object. At the centre of mass, the weighted mass gives a sum equal to zero. It is the point where any uniform force applied on the object acts.

41.

Determine the co-ordinate of centre of mass of the two particles system

Answer»

Explanation:

The CENTRE of mass (CoM) is the POINT RELATIVE to the SYSTEM of particles in an OBJECT. This is that point of the system of particles that embarks the average position of the system in relation to the mass of the object. At the centre of mass, the weighted mass gives a sum equal to zero. It is the point where any uniform force applied on the object acts.

Discussion

42.	A vacuum cleaner is rated at 650 watt. How much electrical energy will it consume in 13 days if it isused for 1.5 hours daily
Answer» USE the general FORMULA P=W/t and FIND the energy for one day. then multiply it to the number of DAYS and u will get the required ANSWER.

42.

A vacuum cleaner is rated at 650 watt. How much electrical energy will it consume in 13 days if it isused for 1.5 hours daily

Answer»

USE the general FORMULA P=W/t and FIND the energy for one day. then multiply it to the number of DAYS and u will get the required ANSWER.

Discussion

43.	if there batteries of P. D's 1.5v 2v and 3Vconnected in series combination in circuit, then what is the total potential difference in the circuit?
Answer» Explanation: I really dont know the ANSWER to this QUESTION and I have to do it is not in the jet CASE but I dont know the answer to this question and I have to do it again and again I am fine here with the grace of almighty and I have to do it for you and I have 3rd BIRTHDAY and I will be waiting for your reply to you and I will be

43.

if there batteries of P. D's 1.5v 2v and 3Vconnected in series combination in circuit, then what is the total potential difference in the circuit?

Answer»

Explanation:

I really dont know the ANSWER to this QUESTION and I have to do it is not in the jet CASE but I dont know the answer to this question and I have to do it again and again I am fine here with the grace of almighty and I have to do it for you and I have 3rd BIRTHDAY and I will be waiting for your reply to you and I will be

Discussion

44.	Is the heat have weight?
Answer» Answer: Yes. If you have absolutely identical objects that have the same WEIGHT exactly when they are at the same temperature, then when ONE object is heated, it will weigh more. ... Temperature DIFFERENCES MEANS that there is a different amount of kinetic energy in the motion of the atoms of the two BODIES...

44.

Is the heat have weight?

Answer»

Answer:

Yes. If you have absolutely identical objects that have the same WEIGHT exactly when they are at the same temperature, then when ONE object is heated, it will weigh more. ... Temperature DIFFERENCES MEANS that there is a different amount of kinetic energy in the motion of the atoms of the two BODIES...

Discussion

45.	How is quantum mechanics related to thermodynamics and the law relating it
Answer» Answer: In thermodynamics, entropy is related to a concrete PROCESS. In QUANTUM MECHANICS, this translates to the ability to MEASURE and manipulate the SYSTEM based on the information gathered by measurement. Explanation:

45.

How is quantum mechanics related to thermodynamics and the law relating it

Answer»

Answer:

In thermodynamics, entropy is related to a concrete PROCESS. In QUANTUM MECHANICS, this translates to the ability to MEASURE and manipulate the SYSTEM based on the information gathered by measurement.

Explanation:

Discussion

46.	12Study the circuit shown in which threeStudeidentical bulbs B,, B, and B, are connected inparallel with a battery of 4.5 V.4.5V190115.16.B,B,(i) What will happen to the glow of other twobulbs, if the bulb By get fused?(ii) If the wattage of each bulb is 1.5 W, then howmuch reading will the ammeter A showwhen all the three bulbs glowsimultaneously?(iii) Find the total resistance of the circuit.
Answer» ANSWER: Explanation: The sy is the STYLE that has the 66inches to MAKE up yuvraj in a GOOD place to make the High pass is the only THING I am Yay the sy and I am

46.

12Study the circuit shown in which threeStudeidentical bulbs B,, B, and B, are connected inparallel with a battery of 4.5 V.4.5V190115.16.B,B,(i) What will happen to the glow of other twobulbs, if the bulb By get fused?(ii) If the wattage of each bulb is 1.5 W, then howmuch reading will the ammeter A showwhen all the three bulbs glowsimultaneously?(iii) Find the total resistance of the circuit.

Answer»

ANSWER:

Explanation:

The sy is the STYLE that has the 66inches to MAKE up yuvraj in a GOOD place to make the

High pass is the only THING I am

Yay the sy and I am

Discussion

47.	Are thin ring has mass 0.25 and radius 0.5 then calculate the mass of inertia about an 1.Axis passing through its centre and perpendicular to its plane 2 .dimeter3.Along the line touching it's circumference of a single point and perpendicular to length
Answer» I HOPE it is HELPFUL for you

Discussion

48.	Metal conduct electricity explain
Answer» ANSWER: metal conduct electricity because they readily give up their electrons.metal have free electrons to move throughout the STRUCTURE and GIVES rise to PROPERTIES such as conductivity. I hope U like my answer

48.

Metal conduct electricity explain

Answer»

ANSWER:

metal conduct electricity because they readily give up their electrons.metal have free electrons

to move throughout the STRUCTURE and GIVES rise to PROPERTIES such as conductivity.

I hope U like my answer

Discussion

49.	A)Check the correctness of the relation:(i) v^2-u^2=2as
Answer» ANSWER: by DIMENSIONAL FORMULA we can CHECK it's CORRECTNESS

49.

A)Check the correctness of the relation:(i) v^2-u^2=2as

Answer»

ANSWER:

by DIMENSIONAL FORMULA we can CHECK it's CORRECTNESS

Discussion

50.	A ball bearing has a diameter of 1cm. Calculate its density if it's mass is 1.04g
Answer» Answer:It MAY help you.Answer is being cliped. Explanation:we have to FIND DENSITY in cgs UNIT i.e. g/cm³.

50.

A ball bearing has a diameter of 1cm. Calculate its density if it's mass is 1.04g

Answer»

Answer:It MAY help you.Answer is being cliped.

Explanation:we have to FIND DENSITY in cgs UNIT i.e. g/cm³.

Discussion

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