A stationary pollen grain suspended in water is hit by a fast-moving water molecule.
Which row in the table correctly describes the motion of the pollen grain and of the water molecule after the collision?
| Pollen grain | Water molecule | |
|---|---|---|
| A | remains stationary | rebounds |
| B | remains stationary | stops |
| C | moves | stops |
| D | moves | rebounds |
Row A
Row B
Row C
Row D
321 exam-style questions on CIE IGCSE Physics 2.1 Kinetic particle model of matter, covering 2.1.1 States of matter and changes of state, 2.1.2a Particle structure and motion in solids, liquids and gases, 2.1.2b Gas pressure and particle collisions, 2.1.2c Brownian motion, 2.1.3a The absolute scale of temperature, and 2.1.3b Pressure, volume and temperature of a gas. Each one has a worked solution and a mark scheme showing where the marks go.