Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
An example of a mechanical wave is---------
water waves
radio waves
x-rays
light rays
Correct answer is A
A mechanical wave is a wave that is an oscillation of matter.
A sound wave is a mechanical wave that propagates along or through a medium by particle-to-particle interaction.
Sound waves, water waves and seismic waves are some examples of mechanical waves mechanical wave.
I. The average speed of the molecules increases
II. The temperature of the gas increases
III. The molecules hit the walls of the container more often than before the compression
I only
I and II only
I, II, and III only
I and III
Correct answer is C
The kinetic-molecular theory of gases assumes that ideal gas molecules:
(1) are constantly moving;
(2) have negligible volume;
(3) have negligible intermolecular forces;
(4) undergo perfectly elastic collisions; and
(5) have an average kinetic energy proportional to the ideal gas's absolute temperature.
Which of the illustrated graphs above represents a body moving with uniform retardation?
A
B
C
D
Correct answer is D
If a body moves with uniform retardation, the velocity-time graph is a straight line.