Physics MCQS

931. Sublimation refers to:
A. Vaporization of a solid without first transforming it into a liquid
B. The melting of a solid
C. The vaporization of a liquid
D. Condensation of a gas into a liquid

932. Under conditions corresponding to its triple point, a substance:
A. Is in the solid state
B. Is in the liquid state
C. Is in the gaseous state
D. May be in any or all of the above states

933. Instantaneous change of momentum is called:
A. Impulse
B. Force
C. Pressure
D. Acceleration

934. The SI unit of impulse is:
A. N/s
B. Kgm/s
C. Newton
D. None of the above

935. An alternate unit to kgm/s is:
A. N
B. Nm
C. Ns
D. J sec

936. Total change in momentum of a moving body is equal to:
A. Impulse
B. Force
C. Inertia
D. Kinetic energy

937. If a force of 10 N acts on a body of mass 5 kg for one second. Then its rate of change of momentum will be:
A. 2 kgms-2
B. 5 kgms-2
C. 50 kgms-2
D. 10 kgms-2

938. If the force acting on a body is doubled then the acceleration becomes:
A. Half
B. Double
C. One-fourth
D. Constant

939. Impulse can be defined as:
A. I = F × d
B. I = F × t
C. I = F × v
D. I = F/p

940. Which among the following is a scalar quantity?
A. Momentum
B. Gravitational force
C. Orbital velocity
D. Mass