What amount of heat is required to raise the temperature of 25 grams of copper to cause a 15? c change? the specific heat of copper is 0.39 j/g? c.

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 direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.

The resistance of 100 w bulb is less than resistance of 40 w bulb. explain the reason.