An artificial earth satellite of mass m is circling around the earth in an orbit of radius R. If the mass of the Earth is M, then the told energy of the satellite is (a) 3GMm/2R (b) -GMm/2R (c) GMm/2R (d) -GMm/R​

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.