On Earth, friction can be but not removed.

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 energy released by a nuclear fusion reaction is produced when

Asimple electrochemical cell contains two electrodes? t or f