A gas in a heat engine expands from 2 x 10-3 m3 to 4 x 10-3 m3 at constant pressure of 5 atmospheres. How much work does it do during that process

According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?

Can a molecule have bond dipoles but not have a molecular dipole?

Why are nonmetals more likely to react with eachother by sharing electrons