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Q: What kind of activity is pressing the palms of your heads against the wall?
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What is found everywhere on the skin except the palms of the hands and the soles of the feet?

hair


Why does rubbing of a matchstick on a rough surface lights up?

The rough surface causes a lot of friction when the matchstick rubs against it. Friction causes heat (try this for yourself by rubbing the palms of your hands together- they feel hot. Then consider how smooth our skin is in comparison to the rough surface, so you appreciate how much heat it generated.) The heat causes the wood of the matchstick to set alight. Actually, the head of the matchstick is coated in a more flammable substance (phosphorus), which makes lighting even easier.


What energy conversion occurs when a person rubs his or her hands together rapidly?

your palms would create friction, which would create heat, this would walm your hands, increasing blood flow due to the increased need of oxegen and due to the heat. you'd also get very tiered arms due to excersion


What are the surfaces in the body where friction ridges are found?

All surfaces that come into contact with each other generate friction. The magnitude of the friction depends on the specific properties the two surfaces. General rule: smooth surface --> less friction. But this fails sometimes too.


How could you levitate for real?

This is a very strange physical feat. Sit in a chair and put your hands between your knees, palms facing eachother. Now, push your hands out while at the same time, squeezing your knees in. Really struggle for one minute. Stand up and close your eyes. let your body relax and you feel like you're floating away.