An unknown resistor is connected between the terminals of a 2.5 V battery. Energy is dissipated in the resistor at the rate of 0.580 W. The same resistor is then connected between the terminals of a 1.12 V battery. At what rate is energy now dissipated?

ill do it for 100, also this isnt 80 its 40

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.