The image shows a person looking at the Moon through a telescope. Describe how light travels from the sky to the viewer’s eye.

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Which transition by an electron will release the greatest amount of energy? oa ob oc od