# Question: What Is Atmospheric Pressure Class 11?

## What is normal atmospheric pressure class 9?

The value of what we call standard sea-level pressure is 760mm of mercury, 1013.25×103 dynes per square centimeter, 14.70 pounds per square inch, 1013.25 millibars, or simply one standard atmosphere which is 101.325 kilopascals..

The hydrostatic paradox states the fact that in different shaped containers, with the same base area, which are filled with a liquid of the same height, the applied force by the liquid on the base of each container is exactly the same.

## What is atmospheric pressure short answer?

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.

## What is normal atmospheric pressure?

Standard sea-level pressure, by definition, equals 760 mm (29.92 inches) of mercury, 14.70 pounds per square inch, 1,013.25 × 103 dynes per square centimetre, 1,013.25 millibars, one standard atmosphere, or 101.325 kilopascals.

## What is the cause of atmospheric pressure?

Air pressure is caused by the weight of the air molecules above. Even tiny air molecules have some weight, and the huge numbers of air molecules that make up the layers of our atmosphere collectively have a great deal of weight, which presses down on whatever is below.

## What is called atmospheric pressure?

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. … One atmosphere is 1,013 millibars, or 760 millimeters (29.92 inches) of mercury.

## What are the two types of pressure?

There are two basic pressure types: absolute and gauge, distinguished by what pressure they are compared to, which is called the reference pressure. Gauge pressure’s reference is ambient atmospheric pressure. Absolute pressure’s reference is an absolute vacuum.

## What is the meaning of 1 atmospheric pressure?

One atmosphere (101.325 kPa or 14.7 psi) is also the pressure caused by the weight of a column of fresh water of approximately 10.3 m (33.8 ft). Thus, a diver 10.3 m underwater experiences a pressure of about 2 atmospheres (1 atm of air plus 1 atm of water).

## What is the highest air pressure?

1083.8mbThe highest barometric pressure ever recorded was 1083.8mb (32 in) at Agata, Siberia, Russia (alt. 262m or 862ft) on 31 December 1968. This pressure corresponds to being at an altitude of nearly 600 m (2,000 ft) below sea level!

## How does atmospheric pressure affect humans?

Barometric pressure often drops before bad weather. Lower air pressure pushes less against the body, allowing tissues to expand. Expanded tissues can put pressure on joints and cause pain.

## What is gauge pressure class 11?

Gauge Pressure. Gauge Pressure. Pressure difference between the system and the atmosphere. From relation P=Pa+ ρgh where P= pressure at any point, Pa = atmospheric pressure. We can say that Pressure at any point is always greater than the atmospheric pressure by the amount ρgh.

## What is standard atmospheric pressure in ATM?

1 atmStandard atmospheric pressure is called 1 atm of pressure and is equal to 760 mmHg and 101.3 kPa. Atmospheric pressure is also often stated as pounds/square inch (psi). The atmospheric pressure at sea level is 14.7 psi.