Physics Past Questions and Answers

Which of the following concept is not an evidence of the particle nature of matter?

A Diffusion
B Brownian motion
C Diffraction
D Crystallization

Question 957:

A diver is 5.2m below the surface of water of density 1000Kgm^-3. If the atmospheric pressure is 1.02 x 10⁵pa. Calculate the pressure on the diver [g = 10ms^-2]

A 6.20 x 10⁴ pa
B 1.02 x 10⁵ pa
C 1.54 x 10⁵ pa
D 5.20 x 10⁵ pa

Question 958:

A steel needle floating on water, sinks when kerosine is added to the water. This is because the kerosine

A Increased the surface tension of the water
B Reduces the density of the water
C Reduces the surface tension of the water
D Reduces the upthrust on the needle

Question 959:

On which of the following factor does the viscosity of a liquid depend? i. Nature of the liquid. ii. Temperature of the liquid. iii. Area of the liquid surface

A I and ii only
B Ii and iii only
C I and iii only
D I, ii and iii

Question 960:

An elastic string of force constant 200N m^-1 is stretched through 0.8m within its elastic limit. Calculate the energy stored in the string

A 64.0J
B 80.0J
C 128.0J
D 160.0J