My Science School

The human foot is designed to walk on grassy or muddy surfaces not on hard concrete or marble. Walking barefoot on such hard artificial surfaces jolts our body and jars the spine. Heels on shoes provide cushioning to the body. The heel requires more cushioning than the rest of the foot because it bears the brunt of the impact with the ground.

In addition to cushioning the foot, the heel also ensures durability of the shoe. A shoe without a heel would soon wear out in the heel region. You can do it because your shoes cushion your feet from injury.

Picture Credit : Google 

What you will need

A wad of old newspaper, large plastic tub, glass tumbler, water.

What you do:

• Fill the tub with water.
• Scrunch up the newspaper and stuff it in the bottom of the glass tumbler. upside down to make sure that the paper does not slip out.
• Holding the tumbler upside down, plunge it straight down to the bottom of the tub.
• Pull out the glass from the water.
• Do not tip the glass to the side at any time during the experiment.

What do you observe?

 When you take out the newspaper, you will find that it is absolutely dry!

Why does this happen?

 Air occupies space. When you submerge the tumbler, the air inside the glass cannot escape. It acts as a block, preventing the water from entering the glass. Hence the newspaper does not get wet.

Picture Credit : Google