Physics Past Questions and Answers

The derived unit of pressure can be expressed as

A Kgms-2
B Kg m-1s-2
C Kg m-2s-2
D Kg m-1s2

Question 3657:

The diagram above illustrates trapped air in a syringe placed in water that is gradually heated. It is observed that the piston rises as the temperature of the water rises. Which of the following statements explains this observation?

A Frequency of collision of trapped air molecules with walls of the syringe is more
B Molecules of trapped air expands more
C Speed of the trapped air molecules decreases
D Number of molecules of trapped air increases

Question 3658:

Which of the following devices is used to determine the relative density of an acid?

A Manometer
B Hydrometer
C Hypsometer
D Hygrometer

Question 3659:

A block of wood of density 0.6 gcm\(^{-3}\), weighing 3.06N in air, floats freely in a liquid of density 0.9 gcm\(^{-3}\). Calculate volume of the portion immersed (g = 10ms\(^{-2}\))

A 510cm3
B 340cm3
C 254cm3
D 170cm3

Question 3660:

A metal ball of weight W falls through a column of glycerine of viscosity V. If the ball experiences an upthrust U and terminal velocity is attained, then

A W > U + V
B W = U + V
C W = U - V
D W < U + V