A Cepheid variable star has an apparent brightness of 85 and a period of 14.3 days. This means the star is 85 times brighter than the Sun would appear at a distance of 1 Megaparsec. About how far away is this star?

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

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.

Which of these questions might a character ask if the conflict is man versus self? a. which path should i take to better myself? b. which boulder will be too heavy for me to carry? c. which friend is going to ditch me today? d. all of the above