If you were in a spaceship travelling at 0.80 c away from a star, at what speed would the star's light pass you? Still travelling at 0.80 c you see another spaceship approaching you, and the star. You measure its speed to be 0.84 c.

What is the other spaceship's speed in the star's frame of reference?

If you put a helium-filled balloon in the refrigerator, what will happen?

Due sun 06/09/2019 11: 59 pm skip navigation questions correct q 1 [1/1] correct q 2 [1/1] correct q 3 [1/1] untried q 4 (0/1) untried q 5 (0/1) untried q 6 (0/1) untried q 7 (0/1) untried q 8 (0/1) untried q 9 (0/1) untried q 10 (0/1) grade: 3/10 print version start of questions two cyclists, 42 miles apart, start riding toward each other at the same time. one cycles 2 times as fast as the other. if they meet 2 hours later, what is the speed (in mi/h) of the faster cyclist?

Which wave is the result of amplification and produces a louder sound