What would be the magnitude of a star with a temperature of 25,000 located on
the main sequence?

How do you tell if someone actually cares about you? and just say they do?

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present