Dara ran on a treadmill that had a readout indicating the time remaining in her exercise session. when the readout indicated 24 min 18 sec, she had completed 10% of her exercise session. the readout indicated which of the following when she had completed 40% of her exercise session?

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.