67486 + Interview Questions in Secondary School in Physics

1.	Heat is conducted through a copper plate at the rate of 460 cal/s・cm2. Calculate the temperature gradient when the steady-state is reached.(Kcopper= 92 cal/ms℃)
Answer» ANSWER: Temperature gradient of the rod is given as $\frac{dT}{dx} = 5 deg C/ m$ Explanation: As we KNOW that THERMAL energy will flow through the metal by CONDUCTION method given as $\frac{dQ}{dt} = kA\frac{dT}{dx}$ so we know that $\frac{1]{A}\frac{dQ}{dt} = k\frac{dT}{dx}$ now we know that $\frac{1}{A}\frac{dQ}{dt} = 460 cal/ s m^2$ now we have $460 cal/s m^2 = 92 cal/ m s C \frac{dT}{dx}$ now we have $\frac{dT}{dx} = 5 deg C/ m$ #LEarn Topic : thermal conduction brainly.in/question/12602371

1.

Heat is conducted through a copper plate at the rate of 460 cal/s・cm2. Calculate the temperature gradient when the steady-state is reached.(Kcopper= 92 cal/ms℃)

Answer»

ANSWER:

Temperature gradient of the rod is given as

$\frac{dT}{dx} = 5 deg C/ m$

Explanation:

As we KNOW that THERMAL energy will flow through the metal by CONDUCTION method given as

$\frac{dQ}{dt} = kA\frac{dT}{dx}$

so we know that

$\frac{1]{A}\frac{dQ}{dt} = k\frac{dT}{dx}$

now we know that

$\frac{1}{A}\frac{dQ}{dt} = 460 cal/ s m^2$

now we have

$460 cal/s m^2 = 92 cal/ m s C \frac{dT}{dx}$

now we have

$\frac{dT}{dx} = 5 deg C/ m$

#LEarn

Topic : thermal conduction

brainly.in/question/12602371

Discussion

2.	3. Which type of thermal expansion is responsible for expansion in liquids?a. linear expansionb. superficial expansion/cubical expansiond. all of these
Answer» EXPLANATION: CUBICAL EXP or SUPERFICIAL exp....✌✌✌

2.

3. Which type of thermal expansion is responsible for expansion in liquids?a. linear expansionb. superficial expansion/cubical expansiond. all of these

Answer»

EXPLANATION:

CUBICAL EXP or SUPERFICIAL exp....✌✌✌

Discussion

3.	P-V diagram showing isobaric compression
Answer» Explanation: An isobaric process is shown on a P–V DIAGRAM as a straight horizontal line, connecting the initial and final thermostatic STATES. If the process moves towards the right, then it is an EXPANSION. If the process moves towards the LEFT, then it is a compression. i hope it HELPS

3.

P-V diagram showing isobaric compression

Answer»

Explanation:

An isobaric process is shown on a P–V DIAGRAM as a straight horizontal line, connecting the initial and final thermostatic STATES. If the process moves towards the right, then it is an EXPANSION. If the process moves towards the LEFT, then it is a compression.

i hope it HELPS

Discussion

4.	Explain how your friendship group can have a negative influence on shaping your identity.
Answer» EXPLANATION: a bad friend circle leads to bad HABITS and destruction of your future. make bad friends but don't DESTROY yourself for them

4.

Explain how your friendship group can have a negative influence on shaping your identity.

Answer»

EXPLANATION:

a bad friend circle leads to bad HABITS and destruction of your future. make bad friends but don't DESTROY yourself for them

Discussion

5.	Motion in a Plane1957. A projectile is thrown with speed 40 ms at angle
Answer» ANSWER: you study in AAKASH institute i also if you like it then MARK it as brainlliest and if POSSIBLE then follow me THANKS

5.

Motion in a Plane1957. A projectile is thrown with speed 40 ms at angle

Answer»

ANSWER:

you study in AAKASH institute i also

if you like it then MARK it as brainlliest

and if POSSIBLE then follow me

THANKS

Discussion

6.	10^19 electrons flows in a wire30 minites what will becurrent?
Answer» $\huge\star{\green{\underline{\mathfrak{Answer :-}}}}$ GIVEN: Electrons flowing in the wire = $\tt{10^{19}}$ Time = 30 minutes To FIND: Current or I Solution: Firstly, we will have to find the Charge. We KNOW that, $\boxed{\red{\tt{Q=\pm ne}}}$ USING this formula, $\leadsto\tt{Q = 10^{19} \times (- 1.6 \times 10^{-19} )}$ $\leadsto\tt{Q = 10^{19} \times - 1.6 \times \dfrac{1}{10^{19}}}$ $\huge\leadsto\tt{\underline{\orange{- 1.6\:Coulomb}}}$ Now, finding the current. We know that, $\boxed{\red{\tt{I = \dfrac{Q}{t}}}}$ Using the formula, $\leadsto\tt{I =\dfrac{- 1.6}{30\times 60}}$ $\leadsto\tt{I=\dfrac{-16}{30\times60\times10}}$ $\leadsto\tt{I=\dfrac{-1}{1225}}$ $\leadsto\tt{I=- 0.000816\:A}$ $\huge\leadsto{\boxed{\purple{\underline{\tt{I=-8.16\times10^{-4}\:Ampere}}}}}$ $\rule{200}4$

6.

10^19 electrons flows in a wire30 minites what will becurrent?

Answer»

$\huge\star{\green{\underline{\mathfrak{Answer :-}}}}$

GIVEN:

Electrons flowing in the wire = $\tt{10^{19}}$
Time = 30 minutes

To FIND:

Current or I

Solution:

Firstly, we will have to find the Charge.

We KNOW that,

$\boxed{\red{\tt{Q=\pm ne}}}$

USING this formula,

$\leadsto\tt{Q = 10^{19} \times (- 1.6 \times 10^{-19} )}$

$\leadsto\tt{Q = 10^{19} \times - 1.6 \times \dfrac{1}{10^{19}}}$

$\huge\leadsto\tt{\underline{\orange{- 1.6\:Coulomb}}}$

Now, finding the current.

We know that,

$\boxed{\red{\tt{I = \dfrac{Q}{t}}}}$

Using the formula,

$\leadsto\tt{I =\dfrac{- 1.6}{30\times 60}}$

$\leadsto\tt{I=\dfrac{-16}{30\times60\times10}}$

$\leadsto\tt{I=\dfrac{-1}{1225}}$

$\leadsto\tt{I=- 0.000816\:A}$

$\huge\leadsto{\boxed{\purple{\underline{\tt{I=-8.16\times10^{-4}\:Ampere}}}}}$

$\rule{200}4$

Discussion

7.	A tube light draws 0.1A current from a 220v supply. What current will this tube draw when it is connected to a 110v supply?
Answer» ANSWER: 0.05 A Explanation: HOPE the answer will HELP you

7.

A tube light draws 0.1A current from a 220v supply. What current will this tube draw when it is connected to a 110v supply?

Answer»

ANSWER:

0.05 A

Explanation:

HOPE the answer will HELP you

Discussion

8.	What is the RMS value of I=10+5 cos(314t)+10sin(314t)
Answer» ANSWER: Yeh konsa CHAPTER KA h?

8.

What is the RMS value of I=10+5 cos(314t)+10sin(314t)

Answer»

ANSWER:

Yeh konsa CHAPTER KA h?

Discussion

9.	ICSE ka paper 2 baar check hota h kiya
Answer» NHII HOTA ...........

9.

ICSE ka paper 2 baar check hota h kiya

Answer»

NHII HOTA ...........

Discussion

10.	What is speed? please define elaborately
Answer» Explanation: Speed DEFINE that how FAST and object move from one PLACE to ANOTHER

10.

What is speed? please define elaborately

Answer»

Explanation:

Speed DEFINE that how FAST and object move from one PLACE to ANOTHER

Discussion

11.	Obtain an expression for the intensity of an electric field at a point due to point charge
Answer» ANSWER: Consider a point charge q called SOURCE CHARGE placed at a point ‘O’ in space. To find its intensity at a point ‘p’ at a distance ‘r’ from the point charge we place a test charge 'q'. The force EXPERIENCED by the test charge q’ will be: F = Eq’----(1) According to coulomb's law the electrostatic force between them is given by: Putting the value of 'F' we get : www.citycollegiate.com This shows that the electric intensity due to a point charge is directly proportional to the magnitude of charge q and INVERSELY proportional to the square of distance. EFFECT OF DIELECTRIC MEDIUM If there is a medium of dielectric constant (ER) between the source charge and the field charge,intensity at a point will decrease er times i.e.

11.

Obtain an expression for the intensity of an electric field at a point due to point charge

Answer»

ANSWER:

Consider a point charge q called SOURCE CHARGE placed at a point ‘O’ in space. To find its intensity at a point ‘p’ at a distance ‘r’ from the point charge we place a test charge 'q'.

The force EXPERIENCED by the test charge q’ will be:

F = Eq’----(1)

According to coulomb's law the electrostatic force between them is given by:

Putting the value of 'F' we get : www.citycollegiate.com

This shows that the electric intensity due to a point charge is directly proportional to the magnitude of charge q and INVERSELY proportional to the square of distance.

EFFECT OF DIELECTRIC MEDIUM

If there is a medium of dielectric constant (ER) between the source charge and the field charge,intensity at a point will decrease er times i.e.

Discussion

12.	What is the relation between specific heat capacity and degree of freedom
Answer» The specific heat of gas at constant volume in terms of degree of FREEDOM 'f' is GIVEN as: Cv = (f/2) R. So, we can ALSO say that, Cp/Cv = (1 + 2/f), where f is degree of freedom. Monoatomic gas has only one translational motion, HENCE three translational degrees of freedom Mark me as brilliant

12.

What is the relation between specific heat capacity and degree of freedom

Answer»

The specific heat of gas at constant volume in terms of degree of FREEDOM 'f' is GIVEN as: Cv = (f/2) R. So, we can ALSO say that, Cp/Cv = (1 + 2/f), where f is degree of freedom. Monoatomic gas has only one translational motion, HENCE three translational degrees of freedom

Mark me as brilliant

Discussion

13.	Standard value of younge modoulus in physics
Answer» Answer: ＴＨＥＵＮＩＴＳＯＦＹＯＵＮＧ'ＳＭＯＤＵＬＵＳＩＮＴＨＥＥＮＧＬＩＳＨＳＹＳＴＥＭＡＲＥＰＯＵＮＤＳＰＥＲＳＱＵＡＲＥＩＮＣＨ (ＰＳＩ), ＡＮＤＩＮＴＨＥＭＥＴＲＩＣＳＹＳＴＥＭＮＥＷＴＯＮＳＰＥＲＳＱＵＡＲＥＭＥＴＲＥ (Ｎ/Ｍ2). ＴＨＥＶＡＬＵＥＯＦＹＯＵＮＧ'ＳＭＯＤＵＬＵＳＦＯＲＡＬＵＭＩＮＵＭＩＳＡＢＯＵＴ 1.0 × 107 ＰＳＩ, ＯＲ 7.0 × 1010 Ｎ/Ｍ2. Explanation: hope u understood plz LIKE N follow and mark me as brainliest

13.

Standard value of younge modoulus in physics

Answer»

Answer:

ＴＨＥＵＮＩＴＳＯＦＹＯＵＮＧ'ＳＭＯＤＵＬＵＳＩＮＴＨＥＥＮＧＬＩＳＨＳＹＳＴＥＭＡＲＥＰＯＵＮＤＳＰＥＲＳＱＵＡＲＥＩＮＣＨ (ＰＳＩ), ＡＮＤＩＮＴＨＥＭＥＴＲＩＣＳＹＳＴＥＭＮＥＷＴＯＮＳＰＥＲＳＱＵＡＲＥＭＥＴＲＥ (Ｎ/Ｍ2). ＴＨＥＶＡＬＵＥＯＦＹＯＵＮＧ'ＳＭＯＤＵＬＵＳＦＯＲＡＬＵＭＩＮＵＭＩＳＡＢＯＵＴ 1.0 × 107 ＰＳＩ, ＯＲ 7.0 × 1010 Ｎ/Ｍ2.

Explanation:

hope u understood

plz LIKE N follow

and mark me as brainliest

Discussion

14.	Derive the equation s=ut+1/2at^2 for position_time relation for an object travelling under uniform acceleration on straight path
Answer» Explanation: We know that DISPLACEMENT(s) = average velocity x TIME( t) But for the same time, average velocity = ( u + v) /2 => s = ( u + v )/2 x t Also, according to the 1st equation of motion, v = u + at substituting for v, we get: s = ( u + u + at) /2 x t => s = ( 2u + at) /2 x t => s =( 2ut + at^2 )/2 => s = ut + 1/2at^2 Hence PROVED.

14.

Derive the equation s=ut+1/2at^2 for position_time relation for an object travelling under uniform acceleration on straight path

Answer»

Explanation:

We know that

DISPLACEMENT(s) = average velocity x TIME( t)

But for the same time,

average velocity = ( u + v) /2

=> s = ( u + v )/2 x t

Also, according to the 1st equation of motion,

v = u + at

substituting for v, we get:

s = ( u + u + at) /2 x t

=> s = ( 2u + at) /2 x t

=> s =( 2ut + at^2 )/2

=> s = ut + 1/2at^2

Hence PROVED.

Discussion

15.	Define speed please define it elaborately for my homework
Answer» Answer: SPEED GIVES the accuracy at what MASS and DISTANCE is formed or COVERED

15.

Define speed please define it elaborately for my homework

Answer»

Answer:

SPEED GIVES the accuracy at what MASS and DISTANCE is formed or COVERED

Discussion

16.	The horizontal component of vector ā is equal tothe vertical component of vector b. If 30° is theangle made by a with its vertical axis and that madeby b with its horizontal axis, then calculate the valueof b in terms of a.
Answer» $\rule{300}{2}$ $\huge\boxed{\underline{\mathcal{\red{A}\green{N}\pink{S}\orange{W}\blue{E}\pink{R:-}}}}$ SEE this attachment This is the BEST POSSIBLE ANSWER $\large{\boxed{\mathbf\pink{\fcolorbox{cyan}{black}{Hope\:you\:have}}}}$ $\large{\boxed{\mathbf\pink{\fcolorbox{red}{yellow}{Understood}}}}$ $♥️Please mark it as♥️$ $\huge\underline\mathcal\red{Brainliest}$ $\huge{\boxed{\mathbb\green{\fcolorbox{red}{blue}{Thank\:You}}}}$ $\rule{300}{2}$

16.

The horizontal component of vector ā is equal tothe vertical component of vector b. If 30° is theangle made by a with its vertical axis and that madeby b with its horizontal axis, then calculate the valueof b in terms of a.

Answer»

$\rule{300}{2}$

$\huge\boxed{\underline{\mathcal{\red{A}\green{N}\pink{S}\orange{W}\blue{E}\pink{R:-}}}}$

SEE this attachment

This is the BEST POSSIBLE ANSWER

$\large{\boxed{\mathbf\pink{\fcolorbox{cyan}{black}{Hope\:you\:have}}}}$

$\large{\boxed{\mathbf\pink{\fcolorbox{red}{yellow}{Understood}}}}$

$♥️Please mark it as♥️$

$\huge\underline\mathcal\red{Brainliest}$

$\huge{\boxed{\mathbb\green{\fcolorbox{red}{blue}{Thank\:You}}}}$

$\rule{300}{2}$

Discussion

17.	Two identical cylindrical vessels, each of base area A, have their base at the same horizontal level. They contain a liquid of density p. In one vessel the height of the liquid is h1 and in the other h2 (> h1 ). When the two vessels are connected, the work done by gravity in equalising the levels is
Answer» ANSWER: The total net work done by gravitational force is 0. HOWEVER, the work done by gravitational force only on the individual vessels is in the attachment EXPLANATION: Your explanation is in the attachment.

17.

Two identical cylindrical vessels, each of base area A, have their base at the same horizontal level. They contain a liquid of density p. In one vessel the height of the liquid is h1 and in the other h2 (> h1 ). When the two vessels are connected, the work done by gravity in equalising the levels is

Answer»

ANSWER:

The total net work done by gravitational force is 0. HOWEVER, the work done

by gravitational force only on the individual vessels is in the attachment

EXPLANATION:

Your explanation is in the attachment.

Discussion

18.	The absolute temperature of a gas is increased 3 times what will be the increase in rms velocity of the gas molecule
Answer» ANSWER: RMS VELOCITY=√3RT÷M RMS DIRECTLY PROPORTIONAL to√T rms1÷rms2=√1÷√3 increase in RMS velocity is rms2-rms1 √1=1 √3=1.732 rms2-rms1=√3-√1 1.732-1=0.732 increase in RMS velocity is 0.732

18.

The absolute temperature of a gas is increased 3 times what will be the increase in rms velocity of the gas molecule

Answer»

ANSWER:

RMS VELOCITY=√3RT÷M

RMS DIRECTLY PROPORTIONAL to√T

rms1÷rms2=√1÷√3

increase in RMS velocity is rms2-rms1

√1=1

√3=1.732

rms2-rms1=√3-√1

1.732-1=0.732

increase in RMS velocity is 0.732

Discussion

19.	What role does family play in the shaping of your Identity
Answer» Explanation: they PLAY an significant role in shaping own's identity . they GIVE us helpful hands and in opportunity with u . they give their whole savings for your building fame.

19.

What role does family play in the shaping of your Identity

Answer»

Explanation:

they PLAY an significant role in shaping own's identity . they GIVE us helpful hands and in opportunity with u . they give their whole savings for your building fame.

Discussion

20.	Two forces of same magnitude 'F' are at right angles to each other. What is the magnitude of the total force acting on the object?
Answer» ANSWER: $\sqrt{2}$ F Explanation: Heya friend , Here we go : For FINDING the resultant FORCE, we can use the formula - $F_{resultant}$ = $\sqrt{F_{1}^{2} + F_{2}^{2} + 2F_{1} F_{2} cos\alpha }$ (for simplicity, I have taken $\alpha$ ) where, $\alpha$ is the ANGLE between the 2 FORCES. and, $F_{1} = F_{2} = F$ and $\alpha$ = 90° So, $F_{resultant} = \sqrt{F^{2} + F^{2} + 2FFcos90}$ and, cos 90° = 0 Hence, $F_{resultant} =\sqrt{2F^{2} }$ = $\sqrt{2}$ F Thanks ! @Manav

20.

Two forces of same magnitude 'F' are at right angles to each other. What is the magnitude of the total force acting on the object?

Answer»

ANSWER:

$\sqrt{2}$ F

Explanation:

Heya friend ,

Here we go :

For FINDING the resultant FORCE, we can use the formula -

$F_{resultant}$ = $\sqrt{F_{1}^{2} + F_{2}^{2} + 2F_{1} F_{2} cos\alpha }$ (for simplicity, I have taken $\alpha$ )

where, $\alpha$ is the ANGLE between the 2 FORCES.

and,

$F_{1} = F_{2} = F$

and

$\alpha$ = 90°

So,

$F_{resultant} = \sqrt{F^{2} + F^{2} + 2FFcos90}$

and,

cos 90° = 0

Hence,

$F_{resultant} =\sqrt{2F^{2} }$

= $\sqrt{2}$ F

Thanks !

@Manav

Discussion

21.	When two resistors.....?
Answer» ANSWER: OPTION 3 is the RIGHT answer

21.

When two resistors.....?

Answer»

ANSWER:

OPTION 3 is the RIGHT answer

Discussion

22.	& Forspeedspeedwalksa man who walks 720m at a coniformamof 2m/s, then runs at coniform speedomls for smin and then again,at Imls for aroun Find his averagespeed.
Answer» ANSWER: FE??,,,??,,....,,,,,'?. I'l-ls.,..

22.

& Forspeedspeedwalksa man who walks 720m at a coniformamof 2m/s, then runs at coniform speedomls for smin and then again,at Imls for aroun Find his averagespeed.

Answer»

ANSWER:

FE??,,,??,,....,,,,,'?. I'l-ls.,..

Discussion

23.	A cricket ball of mass 180g moving with velocity of 25m/s is stopped by a player in 0.6 sec. Calculate the force applied by him/her to stop it
Answer» Given , Mass of the BALL is 180 G = 180/1000 KG = 18/100 kg Force = mass × acceleration = 18 / 100 × ( v - u )/t = 9/50 × ( 0 - 25 ) / 0.6 = 9/50 × -25/0.6 = 9/2 × -1×10/6 = 9×-5/6 = 3 × -5/2 = -15/2 = -7.5 N

23.

A cricket ball of mass 180g moving with velocity of 25m/s is stopped by a player in 0.6 sec. Calculate the force applied by him/her to stop it

Answer»

Given ,

Mass of the BALL is 180 G = 180/1000 KG = 18/100 kg

Force = mass × acceleration

= 18 / 100 × ( v - u )/t

= 9/50 × ( 0 - 25 ) / 0.6

= 9/50 × -25/0.6

= 9/2 × -1×10/6

= 9×-5/6

= 3 × -5/2

= -15/2

= -7.5 N

Discussion

24.	7. What do you understand by the clockwise andanticlockwise moment of force ? When is it takenpositive ?anti
Answer» HEY dude your ANSWER is if the effect of the body is to turn in ANTICLOCKWISE,moment of FORCE is called anticlockwise moment and it is TAKEN positive . If the effect of the body is to turn it clockwise the moment of force is called clockwise moment and it is taken negative If the effect on the body is to turn it anticlockwise, moment of force is called the anticlockwise moment and it is taken positive, while if the effect on the body is to turn it clockwise, the moment of force is called the clockwise moment and it is taken negative. Hope it's help Mark as brainliest ❤️

24.

7. What do you understand by the clockwise andanticlockwise moment of force ? When is it takenpositive ?anti

Answer»

HEY dude your ANSWER is

if the effect of the body is to turn in ANTICLOCKWISE,moment of FORCE is called anticlockwise moment and it is TAKEN positive . If the effect of the body is to turn it clockwise the moment of force is called clockwise moment and it is taken negative

If the effect on the body is to turn it anticlockwise, moment of force is called the anticlockwise moment and it is taken positive, while if the effect on the body is to turn it clockwise, the moment of force is called the clockwise moment and it is taken negative.

Hope it's help

Mark as brainliest ❤️

Discussion

25.	If X equals to a-b then deltax/x is,?
Answer» EXPLANATION: *here* is *your* *ANSWER* *PLZ* *REFER* *ATTACHMENT* HOPE IT HELP**S

25.

If X equals to a-b then deltax/x is,?

Answer»

EXPLANATION:

here is your ANSWER

PLZ REFER ATTACHMENT

HOPE IT HELPS

Discussion

26.	Sin(a+b) =cos(a+b) =tana=
Answer» ANSWER: =TAN (a+b).................................

26.

Sin(a+b) =cos(a+b) =tana=

Answer»

ANSWER:

=TAN (a+b).................................

Discussion

27.	6.6710(-11)75610(24)/(6.4*10(6))2
Answer» ANSWER: -412,706.25 Explanation: it is the answer

27.

6.6710(-11)75610(24)/(6.4*10(6))2

Answer»

ANSWER:

-412,706.25

Explanation:

it is the answer

Discussion

28.	In the to setup X and Y is shown on the next page the wires ABC and pqr are made of the same material and have equal thickness the length of the wire AV in the setup x is equal to the diameter of the semicircle formed by the wire P Q R in the set a boy pin P1 and P2 are attached to the wires ABC and pqr respectively with the help of wax which of the two pins,p1 or p2, will fall off later ?give reason for your answer.
Answer» ANSWER: no it will not FALL off LATER

28.

In the to setup X and Y is shown on the next page the wires ABC and pqr are made of the same material and have equal thickness the length of the wire AV in the setup x is equal to the diameter of the semicircle formed by the wire P Q R in the set a boy pin P1 and P2 are attached to the wires ABC and pqr respectively with the help of wax which of the two pins,p1 or p2, will fall off later ?give reason for your answer.

Answer»

ANSWER:

no it will not FALL off LATER

Discussion

29.	Explain why personal identity changes during adolescence
Answer» Answer: BECAUSE CHANGING THE PHYSICAL CHANGE PSYCHICH,MIND PATTERNS,SOCIAL PROBLEMS,AND PERSONAL PROBLEMS. Explanation:

29.

Explain why personal identity changes during adolescence

Answer»

Answer:

BECAUSE CHANGING THE PHYSICAL CHANGE PSYCHICH,MIND PATTERNS,SOCIAL PROBLEMS,AND PERSONAL PROBLEMS.

Explanation:

Discussion

30.	Tell me about crona virus
Answer» It's a VIRUS... It's ALSO KNOW as COVID 19

Discussion

31.	What is SONAR? Explain the working of a Sonar.
Answer» HOPE it HELP you mark me as a BRAINLIST

31.

What is SONAR? Explain the working of a Sonar.

Answer»

HOPE it HELP you

mark me as a BRAINLIST

Discussion

32.	Stopping distance for a car moving with a speed v is x if car is moving with a speed 3v, then the stopping distance will be
Answer» HOPE it will HELP you :-)

32.

Stopping distance for a car moving with a speed v is x if car is moving with a speed 3v, then the stopping distance will be

Answer»

HOPE it will HELP you :-)

Discussion

33.	Are korona virus walking of a speed of 10 kilometre calculate the time taken by him to cover 1 km
Answer» EXPLANATION: 10 km = 1 hour 1 km = 1/10 hour = 60/10 minutes = 6 minutes = 3600 seconds

33.

Are korona virus walking of a speed of 10 kilometre calculate the time taken by him to cover 1 km

Answer»

EXPLANATION:

10 km = 1 hour

1 km = 1/10 hour = 60/10 minutes = 6 minutes

= 3600 seconds

Discussion

34.	Please help me with this question...
Answer» Electric - iron, MOBILE PHONE Thermal - thermal POWER PLANTS SOLAR energy

34.

Please help me with this question...

Answer»

Electric - iron, MOBILE PHONE

Thermal - thermal POWER PLANTS

SOLAR energy

Discussion

35.	two particles are performing circular motion with same linear momentum if ratio of the kinetic energy of two particles is 4 is to 1 then the ratio of their masses is
Answer» <P>Answer: 1 is to 4 Explanation: m=p^/2k so p is inversely proportional to KE since MOMENTUM is same so the ratio will be reverse of KE so 1 is 4

35.

two particles are performing circular motion with same linear momentum if ratio of the kinetic energy of two particles is 4 is to 1 then the ratio of their masses is

Answer»

<P>Answer:

1 is to 4

Explanation:

m=p^/2k

so p is inversely proportional to KE

since MOMENTUM is same so the ratio will be reverse of KE

so 1 is 4

Discussion

36.	What type of energy is stored in the spring of watch
Answer» Answer: potential energy is STORED in the SPRING of watch . The spring does not have kinetic energy until it is RELEASED and starts to move .In a watch a spring is allowed to move in a regulated WAY .

36.

What type of energy is stored in the spring of watch

Answer»

Answer:

potential energy is STORED in the SPRING of watch . The spring does not have kinetic energy until it is RELEASED and starts to move .In a watch a spring is allowed to move in a regulated WAY .

Discussion

37.	Four point electric charge each of +2micro coulomb are at corners of a square of side 2cm in free space.calculate total electric force acting on +1 micro coulomb placed at centre of the square
Answer» Explanation: VECTOR SUM of the FORCES due to INDIVIDUAL charges

37.

Four point electric charge each of +2micro coulomb are at corners of a square of side 2cm in free space.calculate total electric force acting on +1 micro coulomb placed at centre of the square

Answer»

Explanation:

VECTOR SUM of the FORCES due to INDIVIDUAL charges

Discussion

38.	Name the contact force responsible in briniging the car to rest
Answer» ANSWER: It is FRICTIONAL FORCE.

38.

Name the contact force responsible in briniging the car to rest

Answer»

ANSWER:

It is FRICTIONAL FORCE.

Discussion

39.	(a) JUUK (DJ JIHIs the motion of a body uniform or accelerated if it goesround the sun with constant speed in a circular orbit? (1)
Answer» ANSWER: Accelerated Explanation: Even though the speed is CONSTANT, velocity is not constant. Velocity is a vector. It has both magnitude and DIRECTION. When a body is being ROTATED in a circular orbit it's direction continously changes. So the body is in non-uniform motion. It also has a Centripetal ACCELERATION.

39.

(a) JUUK (DJ JIHIs the motion of a body uniform or accelerated if it goesround the sun with constant speed in a circular orbit? (1)

Answer»

ANSWER:

Accelerated

Explanation:

Even though the speed is CONSTANT, velocity is not constant. Velocity is a vector. It has both magnitude and DIRECTION. When a body is being ROTATED in a circular orbit it's direction continously changes. So the body is in non-uniform motion. It also has a Centripetal ACCELERATION.

Discussion

40.	This is electrostatics . answer this
Answer» 1. ELECTRIC flux doesn't DEPEND on guassian surface. It only DEPENDS on the charge enclosed. 2. a) theta=0° B) theta=180° 3. W=2qE

40.

This is electrostatics . answer this

Answer»

1. ELECTRIC flux doesn't DEPEND on guassian surface. It only DEPENDS on the charge enclosed.

2. a) theta=0°

B) theta=180°

3. W=2qE

Discussion

41.	A car is travelling at 20 m/s. It makes an emergency stop to avoid hitting a badger in the road. If the car has a mass of 1000 kg and it travels 48 m before it comes to a stop, how much braking force did the driver apply? Use the equations below to help you and give your answer to the nearest hundred.
Answer» ANSWER: OK here is your answer Explanation: BYE

41.

A car is travelling at 20 m/s. It makes an emergency stop to avoid hitting a badger in the road. If the car has a mass of 1000 kg and it travels 48 m before it comes to a stop, how much braking force did the driver apply? Use the equations below to help you and give your answer to the nearest hundred.

Answer»

ANSWER:

OK here is your answer

Explanation:

BYE

Discussion

42.	Guys Pls answer my question and btw stay safe
Answer» Answer: The electrons first enter the lowest energy ORBITALS. This can be explained by the aufbau PRINCIPLE which states that electrons are ALWAYS ARRANGED in the order of their increasing energy. Explanation:

42.

Guys Pls answer my question and btw stay safe

Answer»

Answer:

The electrons first enter the lowest energy ORBITALS. This can be explained by the aufbau PRINCIPLE which states that electrons are ALWAYS ARRANGED in the order of their increasing energy.

Explanation:

Discussion

43.	A ten paisa coin places on the revolving table flies off tangentially due to
Answer» DUE to CENTRIFUGAL FORCE...

Discussion

44.	The temperature of ice can be decreasedbelow zero degree celsius by mixing dash in it
Answer» HIIII MATE i think that helps U THANKS mark it's BRAINLIEST and please follow me

44.

The temperature of ice can be decreasedbelow zero degree celsius by mixing dash in it

Answer»

HIIII MATE

i think that helps U THANKS

mark it's BRAINLIEST and please follow me

Discussion

45.	Where do we use these materials?? which of these forms virtual or real image?? 1.Concave mirror 2.Convex mirror
Answer» ANSWER: CONCAVE mirror forms real and virtual image PLS mark as BRAINLIEST

45.

Where do we use these materials?? which of these forms virtual or real image?? 1.Concave mirror 2.Convex mirror

Answer»

ANSWER:

CONCAVE mirror forms real and virtual image

PLS mark as BRAINLIEST

Discussion

46.	Show that the following are dimensionally correct.a) a=v-u÷t
Answer» Using LHS: The DIMENSIONAL formula will be, ${M}^{0} {L}^{1} {T}^{ - 2}$ For RHS, $\frac{v - u}{t} = \frac{v}{t} - \frac{u}{t} \\$ SHOWING both the terms have the same dimensional formula we can prove the terms on LHS and RHS are EQUAL, hence it's dimensionally correct. For the first term on RHS, $\frac{ {L}^{1} {T}^{ - 1} }{ {T}^{1} } \\ = {M}^{0}{L}^{1} {T}^{ - 2}$ Similarly for second term, $\frac{ {L}^{1} {T}^{ - 1} }{ {T}^{1} } \\ = {M}^{0}{L}^{1} {T}^{ - 2} \\$ Since both terms' DF MATCH on the Dimensional formula on RHM. Hence proved.

Discussion

47.	State conventions for the use of si units
Answer» Answer: The NAMES of all UNITS must be written in lower case when written in full form. The symbols of units derived from names of scientists are written in UPPER case (only the FIRST letter; EG.: N). The symbols of units not derived from names of scientists are written in lower case (eg: s). Mark as BRAINLIST❤️

47.

State conventions for the use of si units

Answer»

Answer:

The NAMES of all UNITS must be written in lower case when written in full form. The symbols of units derived from names of scientists are written in UPPER case (only the FIRST letter; EG.: N). The symbols of units not derived from names of scientists are written in lower case (eg: s).

Mark as BRAINLIST❤️

Discussion

48.	What is a lightning conductor
Answer» ANSWER: it's a U shaped device.......which ABSORBS the heat and electricity from lightning and DIRECTLY TRANSFERS it to GROUND.

48.

What is a lightning conductor

Answer»

ANSWER:

it's a U shaped device.......which ABSORBS the heat and electricity from lightning and DIRECTLY TRANSFERS it to GROUND.

Discussion

49.	Definition of half life and avarage life with example
Answer» ANSWER: half life is when you are half the age of when you will DIE if you will live 80 years the half life is 40 years and avrage life MEANS the doctor tells that he will aproax 80 years this is CALLED average life

49.

Definition of half life and avarage life with example

Answer»

ANSWER:

half life is when you are half the age of when you will DIE if you will live 80 years the half life is 40 years and avrage life MEANS the doctor tells that he will aproax 80 years this is CALLED average life

Discussion

50.	A solid has a mass of 200g in air and when partly immersed in a certain liquid it has a mass of 160g. Given that the relative density of the liquid is 0.80. calculate the volume of the solid immersed in the liquid
Answer» Answer: 250 CM3 is the answer Explanation: RELATIVE DENSITY = density of solid/density of liquid (apply this formula you get the density of solid) relative density =0.80 density of liquid=1 density of solid = 0.8 put the formula of BUOYANT FORCE and get the volume

50.

A solid has a mass of 200g in air and when partly immersed in a certain liquid it has a mass of 160g. Given that the relative density of the liquid is 0.80. calculate the volume of the solid immersed in the liquid

Answer»

Answer:

250 CM3 is the answer

Explanation:

RELATIVE DENSITY = density of solid/density of liquid

(apply this formula you get the density of solid)

relative density =0.80

density of liquid=1

density of solid = 0.8

put the formula of BUOYANT FORCE and get the volume

Discussion

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