2. 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 ata distance of 1 Mpc.) About how far away is the star?

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lol I have no idea

Explanation:

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the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy

2%? i tried finding the exact sorry if it's not 100% correct ; -;