Author Question: Suppose you try to bring two protons close together. Because of the electromagnetic force, the two ... (Read 20 times)

nramada · **on:** Jul 27, 2018

Suppose you try to bring two protons close together. Because of the electromagnetic force, the two protons will

A) attract one another.
B) remain stationary.
C) repel one another.
D) collide.
E) join together to form a deuterium nucleus.

Question 2

Algol consists of a 3.7 MSun main-sequence star and a 0.8 MSun subgiant. Why does this seem surprising, at least at first?

A) A star with a mass of 3.7 MSun is too big to be a main sequence star.
B) The two stars should be the same age, so we'd expect the subgiant to be more massive than the main-sequence star.
C) It doesn't make sense to find a subgiant in a binary star system.
D) The two stars in a binary system should both be at the same stage of life; that is, they should either both be main sequence stars or both be subgiants.