Pressure
Force/area
Pressure
An object under water feels lighter than it does in air because of
Buoyancy
Pascal's Principle
When pressure is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid. The fact is calledPascal’s principle
If you blow a stream of air between two balloons that are next to each other, the balloons.
Move toward each other
What is a pascal?
a unit of pressure
Fluids exert pressure because they are made up of tiny
Moving molecules that exert forces
An object is dropped into a beaker containing a liquid. The object drops to the bottom of the beaker. Therefore, the
Density of the object is greater than the density of the liquid
A device that increases force that works because of Pascal’s principle, such as the braking system of a car, is called a _________ device.
Hydraulic
Air above an airplane wing is moving faster than air below an airplane wing. This causes the plane to
Increase its elevation
At higher elevations, air pressure is less because
there is less air above
The pressure exerted by the gas in Earth’s atmosphere is called.
Atmospheric pressure
Bubbles rise in water because they are
Less dense than water
The outward pressure exerted by by a fluid decreases as the speed of the fluid
Increases
The flow of smoke up a chimney is explained by ___________ principle
Bernoulli’s
A fluid is a substance whose _________ can easily change
Shape
Archimedes principle states that the buoyant force on an object is equal to the ______ of the fluid displaced by the object.
Volume
Water pressure ______________ as depth increases.
increases
The bouyant force always acts in an _________ direction
Upward