What chemical bond is formed when an equal exchange of electrons occurs?
a) covalent
b) hydrate
c) ionic
d) magnetic

What happens to light waves from a star as the star moves away from earth?

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

Could someone . i have tried to solve myself but my calculation is off