It Matters
Fluid Facts
Go with the Flow
It's the Principle
Under Pressure
Don't be a Drag
100
Any substance that can flow to take on the shape of the container that holds it would be this.
What is a fluid?
100
If a cork floats in water, we know that the cork must be more dense or less dense than water?
What is less dense?
100
This is the density of water.
What is 1.0 g/cm3? This would be for fresh water. Salt water would have a higher density.
100
The buoyant force acting on an object in a fluid would be equal to this.
What is the weight of the fluid displaced by the object?
100
This is the SI unit for pressure.
What is the Pascal (Pa), which equals 1 Newton per square meter?
100
This is the force that opposes the motion of an object through a fluid.
What is drag force?
200
These are the two common types of fluids.
What are gases and liquids?
200
A cup that weighs 2 N and displaces 1 N of water when submerged will do this.
What is sink?
200
If the following liquids are poured into a cylindrical container, this would be their order from bottom to top.
Water (density of 1.0g/cm3), Honey (density of 1.36 g/cm3), Ethanol (density of 0.79 g/cm3), and Vegetable Oil (density of 0.91 g/cm3)
What is honey, water, vegetable oil, and ethanol?
200
The buoyant force acting on an object equals the weight of this.
What is the fluid it displaces?
200
When an object is in a fluid, the pressure will be applied in this direction.
What is perpendicular to the surface in contact with the fluid?
200
A ship is moving from a freshwater lake to a saltwater inlet. If the owner marked the waterline for each, this would be the area in which the boat floats higher in the water.
What is the saltwater inlet?
300
This state of matter has a definite shape and volume.
What is a solid?
300
A piece of iron has a weight of 3.5 N when it is in air and a weight of 2.0 N when it is submerged in water. This would be the buoyant force acting on the piece of iron.
What is 1.5 N?
300
The upward force applied by a fluid to objects in that fluid would be this.
What is buoyant force?
300
This principle states the when pressure is applied to a confined fluid, the increase in pressure is applied equally throughout.
What is Pascal's Principle?
300
Lily is pushing on a box with 50 N of force. This describes how the pressure will change if she pushes with one finger instead of both hands using the same force.
What is the pressure will increase as the surface area decreases? The pressure she experiences pushing only with one finger will be much greater than the pressure she experiences when pushing with both hands.
300
When someone is underwater, the pressure they experience would the the sum of these two factors.
What is the atmospheric pressure of the air over them and the pressure of the water over them?
400
This state of matter has no definite shape. It can flow to take the shape of its container, but it does have a definite volume. It can only take up a certain amount of space.
What is a liquid?
400
An airplane experiences lift because the air molecules on top of the wing travel more quickly than those on the bottom. What principle explains why this speed would result in lower pressure?
What is Bernoulli's Principle?
400
Because a helium balloon will rise, we know that the buoyant force acting on it must be greater than this.
What is the weight of the balloon?
400
If the wind is blowing and speeding up molecules over the roof of the house, what direction would this cause the roof to move?
What is upward? The pressure decreases where the air molecules are speeding up. This would allow the greater pressure underneath to push the roof upward.
400
Given three scenarios-a diver under water, a person at the beach, and a person on a mountaintop-this person would experience the least amount of pressure.
What is the person on the mountaintop? The higher the elevation, the lower the atmospheric pressure.
400
These three factors impact the strength of the drag force acting on the object.
What is the density of the fluid it's moving through, the size and shape of the object, and the speed of the object.
(more speed or density=more drag force)
(bigger shape or less aerodynamic shape=more drag force)
500
This state of matter has no definite shape or volume. It can flow to take the shape of its container, and it can expand or contract to fit the space.
What is a gas?
500
A small canoe has a weight of 550 Newtons. It is floating on the surface of a pool. This is how large the buoyant force is on the canoe.
What is 550 Newtons?
500
If a 600 Pascals of pressure is applied to a closed system, all other areas of the system would have a pressure of this.
What is 600 Pascals? Any pressure applied to a closed system will be transmitted to all areas of the system equally.
500
Looking at the closed system below, the force applied to the piston on the left is 15 N, and the area of that piston is 1 square meter. The piston on the right is 6 square meters. This would be the amount of upward force exerted by the piston on the right.
What is 90 Newtons?
500
Looking at the closed system below. The area of the piston on the left is 1 square meter. The area of the piston on the right is 6 square meters. If the piston on the left is pushed down 12 meters, the larger piston on the right will rise this much.
What is 2 meters?
500
Reagan has a sample of matter with a mass of 40 grams. The volume is 5 cm3. This would be the density of her matter sample.
What is 8 g/cm3?
Remember: density=mass/volume.