How large an expansion gap should be left between steel railroad rails if they may reach a maximum temperature 35.0C greater than when they were laid? Their original length is 10.0 m. (expansion coefficient of steel: 1.2x10-5 / °C)

hello there!

your answer is a “generator”

a generator does not create energy but instead it transforms it.

it’s basically a motor working in reverse.

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.

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.