1.4)Pressure

Question 1

Pressure in solids =

Answer 1

Pressure = force/area , Pa

Question 2

5 things to know about liquid pressure

Answer 2

1.Liquid pressure acts in all directions
2.As depth increases, liquid pressure increase
3.As density of liquid increases, liquid pressure increases
4. P = ρ g h
5. Points at same level have same level

Question 3

Pressure in liquid =

Answer 3

P = ρ g h , Pa

Question 4

Explain gas pressure in terms of momentum

Answer 4

1.Moving gas molecules collide with inner walls container
2.Causing change in momentum of gas molecules
3.Change in momentum over time = force on inner walls of the container
4.The force applied per unit area is the pressure of the gas

Question 5

Explain why juice can collapses

Answer 5

-Because number of air molecules inside decreases, so frequency of collisions with inner walls of the can decrease
-Causing the pressure inside the can to be smaller than atmospheric pressure, so collapse