M2.2 Pressure in fluids

Front

What is the unit of pressure?

Back

Pascal

Front

What happens to the pressure in a liquid as the depth increases?

Back

It increases

Front

What is the formula for calculating pressure in a column of water?

Back

p = h ρ g

Front

What causes atmospheric pressure to decrease with increasing altitude?

Back

Decrease in the weight of air above the surface

Answer explanation

In this type of question about the atmosphere, the examiner is looking for you to consider give context, rather than the more general response about collisions (which is also true).

Front

What is the key reason behind why an object floats or sinks in water?

Back

The object's density compared to water

Front

What is a fluid?

Back

A substance that can flow (liquid or gas)

Front

What is the unit of pressure that is equal to one newton per square metre?

Back

Pascal (Pa)

Front

Why does the pressure in a liquid increase with depth?

Back

Pressure at any point in a liquid is due to the weight of the liquid above that point

Front

What is upthrust?

Back

The resultant force due to the difference in pressure between the top and bottom surfaces of an object submerged in a fluid

Front

What will an object placed in a fluid do if its weight is equal to the upthrust?

Back

Float