Under Pressure
Pressure --- as the area over which a force is distributed increases.
Decreases
Buoyant force and force of gravity work in --- directions.
Opposite directions
Buoyant Force: Up
Force of Gravity: Down
The unit of pressure, Pa, can be written in terms of its SI base units as ---.
N/m2
The wings of an airplane, or bird, produce this force.
Lift
How many kilograms are in 10,000grams?
10 kg
The formula for pressure is written as ---
An object that is more dense than the fluid in which it is immersed will ---.
Sink
Pascal's Principle states that pressure in a fluid is transmitted --- in all directions.
Equally/Evenly
Fluids typically like to move from areas of --- pressure to areas of --- pressure.
High/Low
How many liters are in 5,200 milliliters?
5.2 L
As we increase altitude there is less air above pushing down.
Archimedes' principle states what?
The magnitude of buoyant force on an object is equal weight of fluid displaced.
Name an example of a hydraulic system in which force is multiplied.
Hydraulic brakes, car lift, bottle jack, cranes, forklifts, heavy machinery, etc.
Bernoulli's Principle tells us that as a fluid's velocity increases, the pressure within the fluid ---.
Decreases
If a hydraulic system contains a large piston that is 15 times larger than its small piston. How much will the force by multiplied by?
15
How does wearing cleats, or spikes, help athletes grip the ground?
(Explain using the following terms: area, pressure)
Cleats decrease the area that an athlete comes into the contact with the ground. Decreasing the area increases the pressure.
A 5mL sample of mercury has a mass of 67.65g. What is its density in g/mL?
13.53 g/mL
Hydraulic systems use two pistons with different --- to multiply force.
Areas
Wind blowing across a chimney or smoke stack induces an upward draft. This is due, in part, to ---.
5.7x106
A can of soda has an internal surface area of 300cm2 and the force exerted on it's wall is 6000Pa. What force is the can experiencing in Newtons?
180 N
A wooden block floats both in water, which has a density of 1.0 g/cm3, and in corn oil, which has a density of 1.38 g/cm3. Less of the wooden block will be submerged in the ---.
Increasing the area a force is exerted does what to the pressure?
Decreases/Lowers
On an airplane, air moves fastest on this side of the wing, causing a region of relatively low pressure.
Top/Above
How would you write 0.000725 in scientific notation?
7.25x10-4