Which best describes the composition, or make-up, of clouds?
a) they are made of heated air.
b) they are made of air pollution.
c) they are made of tiny droplets of water.
d) they are made of carbon dioxide and oxygen.

Aneutron and a proton combine to form a nucleus. why does the mass of the nucleus differ from the sum of the masses of the individual nucleons?

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers total displacement?