1. calculate the weight of a watermelon with a mass of 2 kg on the earth (g = 9.80 m/s2) and on the moon (g = 1.63 m/s2). use this example to describe the differences between mass and weight and how mass and weight are related.
2. apply newton’s second law to calculate the frictional force needed to hold a 0.02 kg pen in your fingers and keep it from falling. (g = 9.8 m/s2)

Fg=mass x gravity

Fg is the same as weight

so Fg=(1360kg)(9.8m/s^2)

He weighs 13,328N or 1.3x10^4N if you use the proper significant digits

volume: 22

density: 7.04

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.​