Liquids

Question 1

Define Pressure

Answer 1

Pressure is the amount of force per unit of area

Question 2

What is the equation for pressure

Answer 2

Pressure = Force/Area

Question 3

How is pressure measured

Answer 3

Because Pressure involves force and force is measured in Newtons

Pressure is measured in Pascals (Netwons per square meter)

Question 4

Explain Pressure

Real World example

Answer 4

Pressure decreases when you exert the same force over a large area rather than a small one.

For example, when you stand on one leg, you create more pressure than standing on two legs. This is because your mass is spread out in less area, (your one foot) rather than more area (your two feet).

Question 5

Define Liquid Pressure

Answer 5

Liquid pressure is the increase in pressure as you increase the depth of the liquid.

Question 6

What is the equation for liquid pressure

Answer 6

Liquid Pressure = Weight Density x Depth

Question 7

Explain Liquid Pressure

Real World example

Answer 7

The pressure of a liquid changes because the deeper you are, the more liquid that has to be supported.

For example, there is more pressure at the bottom of a swimming pool rather than the top. This is because the water at the bottom of the pool has to support the rest of the water at the top (pushing down).

Question 8

Define Density

Answer 8

Density is the amount of mass per unit of volume

Question 9

What is the equation for density

Answer 9

Density = Mass/Volume

Question 10

Explain Density

Real World example

Answer 10

An object that has more mass and less area is more dense than an object with less mass and more area.

For example, a feather wouldnt be very dense because it doesn’t have a lot of mass and takes up a large space. But a penny would be dense because there’s more mass covering less area.

Question 11

Define Buoyancy