Which action best demonstrates the transformation of mechanical energy to heat energy? digesting a meal

burning a candle

rubbing hands vigorously

melting a piece of ice in sunlight

rubbing hands vigorously

Explanation:

you can try it your self right now you know like when your outside playing with snow?and you rub your hands?it makes heat.thats is my explantion:)

your best option is 5,000 kg

the calvin cycle has three stages. in stage 1, the enzyme rubisco incorporates carbon dioxide into an organic molecule. in stage 2, the organic molecule is reduced. in stage 3, rubp, the molecule that starts the cycle, is regenerated so that the cycle can continue