Fluid Flow
Fluid Flow/Viscosity
Mass, Weight, Volume
Density
Buoyancy
100
What is a force?
It's a push or pull that causes a change in movement.
100
What is the difference between laminar and turbulent flow?
Laminar flow is when a fluid flows in straight, smooth lines around an object. Turbulent flow is when a fluid flows in choppy lines and creates instability.
100
What's the difference between mass and weight?
Mass is the amount of matter in an object, but weight is the measurement of the force of gravity pulling on the object.
100
If the mass is 200g and the volume is 10mL, what is the density?
It's 20g/mL.
100
What is buoyancy?
It is the upward force exerted by a fluid.
200
What is flow rate?
It's how quickly a fluid flows in a given amount of time.
200
Why do engineers use wind tunnels?
They use wind tunnels to study how air/fluid moves around a solid object, so they can improve their design.
200
What happens to your mass and weight if you go to the Moon?
Your mass stays the same, but your weight changes because the Moon's gravity is different.
200
Why does oil "float" on top of water?
It floats on top of water because it has a lower density.
200
How did Archimedes prove that the king's gold crown was fake?
He used displacement to prove that the crown had a different density than pure gold of the same mass.
300
What's the difference between hydrodynamics and aerodynamics?
Aerodynamics is air or gas moving around solid objects, while hydrodynamics is liquid moving around a solid object.
300
What is viscosity?
It's the resistance of a fluid to flowing and movement.
300
What is volume?
Volume is the amount of space taken up by an object.
300
The mass is 150g and the density is 50g/mL. What is the volume?
The volume is 3mL.
300
What's the difference between positive, neutral, and negative buoyancy?
Positive: force of gravity < buoyant force SO object floats Neutral: force of gravity = buoyant force SO object stays in middle Negative: force of gravity > buoyant force SO object sinks
400
Name all the changes in state going from a solid to a gas and back again.
Melting, evaporation, condensation, freezing. (sublimation)
400
What's the difference between cohesion and adhesion?
Cohesion is the attractive force that exists between particles of the same substance. Adhesion is the attractive force that exists between the particles of a fluid and another substance.
400
How would you measure the volume of a perfect cube?
length x width x height
400
Compare the densities of a solid, liquid, and gas using the KMT.
Solid = particles closer together = highest density Liquid = particles farther apart = lower density Gas = particles very far apart = lowest density
400
Who made the best boat?
JIM KIM!
500
What are the three parts of the Kinetic Molecular Theory?
1. All matter is made of particles. 2. Particles are always moving. 3. There are forces of attraction among the particles.
500
Which instrument can be used to measure viscosity?
A viscometer.
500
How would you measure the volume of something with an irregular shape?
1. Fill a graduated cylinder with water and record the volume. 2. Drop the object in the water and record the change in volume.
500
What happens to the density of honey when it is a) heated b) cooled?
The density of honey becomes lower as it is heated and higher as it is cooled.
500
What is the name of the boy from The Iron Giant?
Hogarth Hughes
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