Physics Past Questions and Answers

An astronaut is walking on the moon where the magnitude of the acceleration due to gravity "g’ is one-sixth that on earth. Compared with their magnitudes on the earth, his mass and weight on the moon are ____________

A Both less
B Less and the same respectively
C The same and less respectively
D The same as on earth
E Both greater.

Question 52:

Which statement is NOT correct about molecules?

A The number of molecules in a unit volume of a solid is greater than that in a unit volume of a liquid or gas.
B Molecules are made up of atoms
C The force of attraction between two molecules of a solid is greater than that between two molecules of a liquid or gas
D Molecules of gases are in regular motion
E Molecules of a solid vibrate about their mean positions.

Question 53:

The inside of a vacuum flask is usually coated with silver to reduce heat loss by ____________

A Condensation
B Conduction
C Convection
D Evaporation
E Radiation

Question 54:

What is the angular velocity of an object in a horizontal circular path of radius 1.5m with a constant speed of 12ms^-1?

A 1.6 rads^-1
B 4.0 rads^-1
C 8.0 rads^-1
D 16.0rads^-1
E 32.0 rads^-1

Question 55:

A wave is represented by the equation y = 0.5 sin 0.4 Ω(X - 60t), where the distance (X) is measured in centimetres and time (t) in seconds. What is the wave length of the wave?

A 0.2cm
B 0.4cm
C 0.8cm
D 5.0cm
E 10.0cm