Explica porque é que, partindo de uma certa altura, do repouso e sem qualquer sistema auxiliar de movimento, “o carrinho não alcança em parte nenhuma do percurso ponto mais alto do que aquele de onde partiu”

Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!

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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.

measuring things 1 litre of water