Author Question: When the nuclear reactions begin making too little energy in a star, by virtue of the natural ... (Read 83 times)

LaDunn · **on:** Jul 27, 2018

When the nuclear reactions begin making too little energy in a star, by virtue of the natural thermostat, the star:

A) would expand slightly.
B) would reduce its central temperature.
C) would increase its density.
D) would increase the mass by a factor of 2.

Question 2

Only photons with wavelengths _____ can ionize hydrogen.

A) shorter than 91.2 nm
B) longer than 104.3 nm
C) shorter than 40 nm
D) longer than 80 nm