In which situations is work being done? (I put the choices below, also I need more than one answer)
1. Hannah leans against her locker, but it doesn't move
2. Andy's car rolls down a hill with the engine off
3. A wind turbine stands still on a sunny, windless day
4. A balloon expands as its heated by the sun
5. James pedals a stationary exercise cycle that doesn't move

2 Andy's car rolls down a hill with the engine off

Explanation:

work is said to be done whenever a force moves a body a distance in the direction of the force note stationary object don't move so no distance is covered.

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.