Will a body weigh more in air or in vacuum when weiged with a spring balance? Give a reasonfor you answer.

Is 45975 divisible by 15? Give reason for you answer.

Read the following statements : S_(1) : An object shall weigh more at pole than at equator when weighed by using a physical balance. S_(2) : It shall weigh the same at pole and equator when weighed by using a physical balance. S_(3) : It shall weigh the same at pole and equator when weighed by using a spring balance. S_(4) : It shall weigh more at the pole than at equator when weighed using a spring balance. Which of the above statements is/are correct ?

In which medium the speed of sound is more : humid air or dry air ? Give a reason to your answer.

a metal solid cylinder tied ot a thread is hanging from the hook of a spring balance. The cylinder is gradually immersed into water contaned in a jar. What changes do you expect in the readings of spring balance? Explain your answer.

A block of mass m is placed on weighing machine and it is also attached with a spring balance. The whole system is placed in a lift as shown in figure. Left is moving with constant acceleration 10 m//s^(2) in upward direction. The reading of the weighing machine is 500 N and the reading of spring balance is 300 N. Find the actual mass of the block in kg. (Takr g = 10 m//s^(2) )

The angular velocity of the earth's rotation about its axis is omega . An object weighed by a spring balance gives the same reading at the equator as at height h above the poles. The value of h will be

Name the form of energy which a body may possess even when it is not in motion. Give an example to support your answer.

Fig. shows I-V graph for two conductors A and B. Which conductor has more resistance ? Give reason to you r answer.

A 20 N metal block is suspended by a spring balance. A beaker containing some water is placed on a weighing machine which reads 40 N . The spring balance is now lowered so that the block gets immersed in the water. The spring balance now reads 16 N . The reading of the weighing machine will be.

"Terminal velocity is more if surface area of the body is more ".Give reasons in support of your answer