Answer:
Redshift, or lower power
Explanation:
doppler effect
waves get stretched when you are moving away from something, and squished when you are moving towards it. Imagine you have a long, bent wire. if you stretch out the wire, the wavelength becomes longer. This also applies to sound.
Answer:
212.5
Explanation:
25(F) times 8.5(d)=212.5(W)
Answer:
White dwarf stars are still burning fuel black dwarf stars have died.