What is the area of a window that measures 2m by 4m?
8 m^2
100
State Pascal's Principle.
When pressure is applied to a confined fluid, the pressure is applied evenly to the entire fluid.
100
What allows vehicles such as hot-air balloons and blimps to fly?
Buoyancy.
100
What is density?
Mass divide by volume
100
What is the formula to calculate pressure?
P = F/A
200
What is the volume of a block with measurements 2cm by 4cm by 5 cm?
40 cm^3
200
What is the primary practical use of Pascal's Principle?
Hydraulics.
200
The Wright Brothers were the first to achieve what type of flight?
Heavier-than-air flight.
200
What is a fluid?
Anything that flows/has no fixed shape (liquid or gas)
200
What happens to fluid pressure as depth increases?
It increases.
300
Convert 254g to kg.
.254kg
300
Describe a hydraulic system.
Two pistons contain fluid between them, and force applied to one piston results in pressure in the fluid and thus a force on the other piston.
300
State Bernoulli's Principle.
When a fluid moves, the faster its speed, the less pressure it exerts.
300
State Archimedes' Principle.
The buoyant force on an object is equal to the weight of the displaced fluid.
300
What is the pressure when a 200-N force is applied to an area of .5m^2?
400 Pa
400
What is the weight in Newtons of a piece of lead with mass 10kg?
10kg*9.8m/s^2=98N
400
What is the primary benefit of hydraulic systems?
You get more force out than you put in.
400
Describe how the shape of an airplane's wing allows for lift.
The greater curve on the top forces the air to move more quickly over it, which results in less pressure on the top.
400
What are the two forces that determine whether an object sinks or floats?
Weight/gravity and buoyancy
400
Explain how snowshoes allow one to walk on snow.
They increase the area and so decrease the pressure.
500
What is the density of piece of wood which has a volume of 1000cm^3 and a mass of 550 g?
5.5 g/cm^3.
500
A hydraulic system has pistons with areas of 1 cm^2 and 10 cm^2. If we want to get 1000 N of force from the large piston, how much force must we apply to the smaller piston?
100 N.
500
Describe how a chimney works making use of Bernoulli's Principle.
The wind causes the air to move over the top which results in less pressure, pulling the smoke up and out of the house.
500
If a piece of sulfur (density 2.0 g/cm^3) is placed in a tub of bromine (density 3.1 g/cm^2), will it float or sink, and how do you know?
Float, because the density is lower.
500
If a .5m by 1m window experiences pressure of 2000 Pa, what will the force in Newtons be?