Aplanetary nebula is the phase of a

a) star in its late life
b) protostar before it becomes a white dwarf
c) star before it becomes a black hole
d) planet before it becomes a star

11. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

It is really hard for me right know