The redshift of a star means that
a. the star is moving closer to the sun
b. the star is moving
c. the star is about to explode
d. the star is getting farther away

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.

What would people living along the coast in south florida do if there was a hurricane warning? move to locations away from the water flock along coasts to watch the natural phenomenon buy instruments to predict the exact location of the hurricane measure water levels to know the exact time of the hurricane

Acar is traveling 35 mph on a smooth surface . if a balanced force is applied to the car what happens?