Applying E = hf to photon emission from an atom, the symbol E ...

[yoooooman]

Applying E = hf to photon emission from an atom, the symbol E represents the energy
 
  A) of the emitted photon.
  B) difference between atomic energy levels producing the photon.
  C) both of these
  D) neither of these

Question 2

Why are planets and stars approximately spherical, whereas asteroids and meteorites are shaped like ordinary rocks?
 
  What will be an ideal response?

[yahahah24021]

Answer to Question 1

Answer: C

Answer to Question 2

In large bodies, the gravitational forces are much larger than the elastic forces, so the body takes on a spherical shape (except for a slight oblateness due to rotation,) whereas in small bodies the elastic forces are much larger, so the bodies retain their shape.

[yoooooman]

Excellent

[ecabral0]

Gracias!