Question

Urc, died and pressure related to each other?
4. Why do safety pins and drawing pins have narrow and sharp tips?
5. What do you understand by atmospheric pressure? H.​

Answer 1

Answer:

4. Pressure is the total force per unit area. The ends of the nails and pins are made sharp in order to minimize the area which in turn increases the pressure. So when you hit the nail on its head , even a small force converts into a large pressure due to the small area of the tail and the nail is able to insert in the wall.

5. That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer. In a barometer, a column of mercury in a glass tube rises or falls as the weight of the atmosphere changes.