What is magnetism caused by?
a. the motion of protons
b. the motion of electrons
c. the attraction between protons and electrons
d. the interaction between neutrons and protons

Anne applies a force on a toy car and makes it move forward. what can be said about the forces acting on the toy car at the moment anne applies the force?

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

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