According to the kinetic theory, what happens when the temperature of water increases?
The water molecules increase their speed.
The water molecules do not change speed.
The water molecules decrease their speed.

Consider lifting a box of mass m to a height h using two different methods: lifting the box directly or lifting the box using a pulley (as in the previous part). what is wd/wp, the ratio of the work done lifting the box directly to the work done lifting the box with a pulley?