What is an upward force that keeps an object immersed or floating on a liquid?
Buoyant Force
100
Why do planes need different size wings?
Bonus: Use a vocabulary word to answer the question
Planes have different size engines and therefore different amounts of thrust.
100
What is the pressure exerted by a 200N object that has an area of 10m2?
Pressure= 200/10
Pressure= 20N/m2= 20Pa
100
Why does a helium balloon float in the air?
Helium is less dense than air.
200
True or False:
Fluids exert the most pressure downward.
If false, make it true
False
Fluids exert pressure equally in all directions.
200
What is the equation to calculate density?
Density= mass/volume
200
Fill in the Blank using Bernoulli's Principle:
The pressure in a fluid _____________ as the fluid's velocity _______________.
DECREASES, INCREASES
200
What is the pressure exerted by a 5cm2 object that weight 10N?
Pressure= 10N/5cm2
Pressure= 2N/cm2= 2Pa
200
In what direction do fluids exert pressure?
In all directions
300
What is the equation to calculate Pressure?
Pressure= Force/Area
300
What are TWO things you can change to change the density of an object?
Change the mass
Change the volume
300
What part of the plane causes lift?
BONUS: Does air flow FASTER over or under this part
wing
over
300
If an object that weighs 50N displaces a volume of water that weighs 10N, will the object FLOAT or SINK? Why?
Sink- The object weighs more than the displaced water.
300
Fill in the blanks:
Fluid flow from __________ to __________ pressure
High, Low
400
Fill in the sentence:
As Altitude INCREASES, atmospheric pressure ________________
(As you go move to higher elevations)
DECREASES
400
What is the definition of mass?
What is the definition of volume?
mass- the amount of matter in an object
volume- the amount of space an object takes up
400
What is the force that is parallel to the velocity of the flow that opposes motion?
Drag
400
What is the density of an object that has a mass of 50g and a volume of 100cm3?
BONUS: Will the object FLOAT or SINK in water? (water's density is 1g/cm3)
Density= 50/100
Density= 0.5g/cm3
400
How does the density of ice compare to the density of water?
Density of ice if less than the density of water.
500
Fill in the sentence:
As your depth under water INCREASES, the water pressure __________________.
INCREASES
500
Fill in the blank with SINK or FLOAT:
An object will ___________ if the weight of the object is LESS than the weight of the water it displaces.
An object will ___________ if the weight of the object is GREATER than the weight of the water it displaces.
FLOAT
SINK
500
How does Drag affect Lift?
Lift is reduced when turbulence causes drag.
500
A 10g object is placed in a graduated cylinder filled with 20mL of water. The water rose to 25mL.
What is the density of the object?
BONUS: Does the object FLOAT or SINK? (The density of water is 1g/mL)
Density= 10g/5mL
Density= 2g/mL
Object will SINK
500
Where is the water pressure greater: at a depth of 1 m in a large lake or at a depth of 2 m in a small pond?