What effect does frequency have on wave height?

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

The speed of light can be used to measure the

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.