Go With The Flow:

Under Pressure

The Pressures of Life

Fluid Math

Float This Idea

Fluid Theory

1 1 1 1 1

2 2 2 2 2

3 3 3 3 3

4 4 4 4 4

Fluid Math 1

• Equations for this chapter are:• Pressure =? And units?• Density= ? And Units?

• (four answers must be correct!)

Fluid Math 2

• A tree falls into a river. It displaces 1020 kg of water. What is the strength of the buoyant force on the tree?

Fluid Math 3

• A person’s 2 shoes cover a total area of 200 cm squared. The pressure each shoe exerts on the floor is 5 N/cm squared. What is the weight of the person?

Float this Idea 1

• Which soda has more buoyant force acting on it?

Fluid Math 4

• One piston in a hydraulic device has 5 Newtons of force applied to it. Its area is 10 cm squared. The other piston 50 cm squared.

• What is the pressure in the hydraulic device?• How much force does the larger piston apply?

Under Pressure 1

• Name the 3 things you can do to a container of gas to get the gas to change its pressure

Under Pressure 2

• What causes pressure to exist in fluids? (2 things)

The Pressures of Life 3

• Why does the balloon inflate with air?• What body organ does the bottle with the

balloon in it represent?• What body organ does the balloon on the

bottom represent?

The Pressures of Life 1

• When I was a kid, my best friend’s mom would smoke cigarettes all the time. When she drove us somewhere, she would crack her window open a little so the smoke could escape. Would more smoke get sucked out if the car was parked, or if it was going slow, or going fast?

• What principle does this show?

The Pressures of Life 2

• You want to get across some very thin ice in order to get a cookie. Without anything to use but your own body, what are going to do to get across the ice without breaking it?

• HINT: One trick has direct use of concept of pressure.

Float this Idea 2

• Watch the demonstration with the rock in the boat and answer Mr Jones’ question

Under Pressure 3

• Would you expect a bubble of air to stay the same size as it rises from deep in the ocean? Defend your answer.

Under Pressure 4

• Balanced pressure systems cause weather to move from one place to another (T/F?)

The Pressures of Life 4

• If a fish goes deeper into the water, why doesn’t it get crushed?

Fluid Theory 1

• Fluids hold their shape easily (t/f)

Fluid Theory 2

• Can pressure of a fluid be expressed in pounds per inch?

Float This Idea 3

• Oil is thick and has high viscosity. This makes oil denser than water. (t/f)

• Support your answer

Float this Idea 4

• When Mr Jones squeezes the Cartesian Diver, it sinks. How can its density change to make it dive?