Two planets both have the same mass, but different sizes. Planet Bluper has 3 times the radius as planet Ruper. If your weight on planet Ruper was 180 N, what would be your weight on planet Bluper?

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.