Physics

Problem

A typical molecule of gas in the air has a mass of

4.8 \times 10^{-26} \text{ kg}

and moves at

500 \text{ ms}^{-1}

. If such a molecule collides with, and rebounds elastically from, a flat surface, a. calculate the impulse felt by the molecule. b. state the impulse felt by the flat surface. c. if

2.1 \times 10^{27}

molecules collide with, and bounce off,

1 \text{ m}^2

of the surface every second, calculate the pressure that the air exerts on the surface.

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