A bungee jumper has a mass of 74.3 kg and falls a distance of 113 m before the bungee catches and sends the jumper upwards. 1. Assuming the jumper starts from rest, find their total mechanical energy.
2. Assuming energy is conserved, find the speed of the jumper just before the bungee catches.
3. After the bungee catches, the jumper returns to a maximum height of 98.3 m. How efficient is the bungee in returning the stored energy to the jumper?

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

conduction, convection, radiation

a skateboard rolling across the street - apex