Pressure and Density

How to calculate density?

• $E\ =\ \frac{P}{t}$

• $\rho\ =\ \frac{m}{v}$

• $\mu\ =\ \frac{m}{v}$

• $\rho\ =\ m\ \times\ v$

Why are solids more dense than liquids?

• All of the following

• More atoms

• No free moving ions

• Have a high mass for a certain volume

Which of the following is needed in order to calculate density?

• Gravity

• Mass

• Height

• Force

• Volume

What is the unit for density?

• $\rho$

• $\mu$

• $\lambda$

• $\gamma$

• $\sigma$

Define ‘Pressure’

• The force per unit area

• The are per unit force

When there is a small surface area, the pressure is _______________

• Low

• High

When there is a large surface area, the pressure is _________________

• Low

• High

What is the unit for pressure?

• $Nm^2$

• Pascals

• Joules

• None of the

How is the pressure in liquids calculated?

• $\rho\ =\ \frac{m}{V}$

• $P\ =\ \frac{F}{A}$

• $P\ =\ \rho gh$

• None of the above

What are the properties of the pressure in liquids?

• Pressure is exerted in one direction

• Pressure depends on the density of the liquid

• Pressure depends on the depth

• Pressure is independent from th e shape of the container

• All of the above