Fluids & Force
Fluids & Pressure
Fluids & Motion
Who Said That?
Extra
100
This is a material that can flow, and has no definite shape. Both gases and liquids are these.
What are fluids.
100
A fish rests on the bottom of a bucket of water while the bucket is being weighed. When the fish begins to swim around in the bucket, how does the reading on the scale change?
The mass of the system, and so the scale reading, will remain unchanged.
100
Moving fluids can exhibit __________ flow or turbulent flow.
What is laminar (smooth)
100
He developed this principle: Fb = Fg (displaced fluid) = mfg magnitude of buoyant force = weight of fluid displaced
Who is Archimedes'
100
When drinking through a straw, you reduce the pressure in your mouth and the atmosphere moves the liquid. Could you use a straw to drink on the moon? (Assume you can survive on the moon without any space gear)
The pressure that pushes the liquid through the straw is non-existent on the moon. No
200
Represented by the Greek Letter P; is the mass per unit volume of a substance.
What is mass density.
200
What is the main difference between a solid and a fluid?
Fluids can not resist forces no matter what the magnitude.
200
The pressure in a fluid decreases as the fluid's velocity increases.
What is Bernoulli's Principle
200
He developed this principle: Pressure applied to a fluid in a closed container is transmitted equally to every point of the fluid and to the walls of the container.
Who is Pascal
200
He was a Greek mathematician; born on the island of Sicily.
Who is Archimedes
300
If you've ever rested an air mattress in a swimming pool, you have experienced this.
What is buoyant force.
300
This is a measure of how much force is applied over a given area.
What is pressure.
300
This type of fluid is incompressible, nonviscous, and, when undergoing ideal flow, nonturbulent.
What is Ideal Fluid
300
The Pascal was named after Pascal. One pascal is equal to this.
What is 1 N/m^2
300
An ice cube is submerged in a glass of water. What happens to the level of the water as the ice melts?
Increases...
400
Force is this type of quantity that causes change in motion.
What is vector quantity.
400
The pressure in a fluid _________ in depth.
What is increases.
400
According to Bernoulli's principle, swift-moving fluids exert ____________ pressure than slower-moving fluids.
What is less
400
If an inflated beach ball is placed beneath the surface of a pool of water and released, the ball shoots upward. Why?
The water "repels" the ball with a force that is exactly the weight of the volume occupied by the ball... (Archimede's principle)..
400
Steel is much denser than water. How do steel boats float?
Displacement...
500
Which of the following will float in a tub of mercury? a. Solid Gold Bead b. An Ice Cube c. An Iron Bolt d. 5 mL of water
bcd
500
Pressure = force/[this]
What is area.
500
Pressure is measured in these kinds of units.
What are pascals.
500
Will a ship ride higher in an inland freshwater lake or in the ocean? Why?
Salt water as the density is higher.
500
Why do balloonists use helium instead of air in balloons?
Hydrogen is to flammable. Nobody wants to sit there and blow up balloons. Balloons were meant to float.
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