Question

When you pump a bicycle tire, what is happening to the particles inside the tire?

A:Nothing, because pumping in more air does not affect the particles inside.
B:They are moving closer together and contracting, filling the tire and making it more firm.
C:They are moving farther and farther apart, which is what expands the tire.
D:They are moving faster and faster, making the tire feel more full.

Answer 1

Answer:B

Explanation: Just did it

Answer 2

collisions of particles with the inside walls of the tire cause the pressure that is exerted by the enclosed gas. because of the increasing the number of air particles increases the number of collisions, which then increased the pressure of the tire.