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:)

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.