The gymnast swings from one bar to the other bar several times Describe how the gravitational potential energy store and the kinetic energy store of the gymnast change as she moves between the bars ​

If you put a helium-filled balloon in the refrigerator, what will happen?

Three resistors are connected in series across a 15-v power supply. if the potential drops across resistors 1 and 2 are 4.1 volts and 3.1 volts, what is the exact potential drop (in volts) across resistor 3?

How many electrons does each element require in its valence shell to become stable?