What word means what scientists do that is the basis for their investigation

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

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?

The amount of potential energy possessed by an elevated object is equal to