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.
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