Pressure

Question 1

What is the unit of Pressure?

Answer 1

Pascals Pa

Question 2

Give the formula for pressure

Answer 2

P= Force/ Area

Question 3

How can you increase the pressure?

Answer 3

By reducing the area

Question 4

How can you decrease the pressure?

Answer 4

By increasing the area

Question 5

What are properties of stationary liquid in an open container?

Answer 5

Pressure acts in all directions
Pressure increases with depth
Pressure depends in the density of the liquid
Pressure does not depend on the shape of the container

Question 6

State the equation of pressure in liquids

Answer 6

Pressure= Density * Gravitational Potential * Height

Question 7

What happens to the air pressure as you go up?

Answer 7

It becomes less because there is less weight above

Question 8

What is the atmospheric pressure at sea level?

Answer 8

100,000Pa

Question 9

How much is 1 atm?

Answer 9

10^5 Pa

Question 10

What is the unit for pressure in barometers?

Answer 10

mmHg

Question 11

How much is 1 atm in mmHg?

Answer 11

760mmHg

Question 12

Why is mercury used in a barometer?

Answer 12

Mercury is the densest liquid and therefore it has the shortest height of liquid compared with other liquids

Question 13

What is the air at the top of the barometer called?

Answer 13

Vacuum

Question 14

Give an equation for the manometre

Answer 14

Pressure of gas= Pressure of liquid+ Pressure of atmosphere