Ch. 13 Test Flashcards
What is the SI unit of pressure?
Pascal
What is the equation for pressure?
Pressure=Force/Area
Pressure is the greatest at where?
Greatest depth
Fluid can be a ________ or _________.
Gas or liquid
What does pressure depend on?
Type and amount
What is atmospheric pressure?
Air pressure increases as altitude decreases
State Archimedes’s Principle.
The buoyant force of an object is equal to the weight of the fluid displaced by the object
State Bernoulli’s Principle.
As the speed of a fluid increases, the pressure within the fluid increases
State Pascal’s Principle.
A change in pressure at any point in a fluid is transmitted equally and unchanged in a ll directions of the fluid
What is a hydraulics system?
A devise that uses pressurized fluid acting on pistons of different sizes to change a force
What is lift?
The pressure difference between the top and the bottom of a wing that creates an upward force
What is buoyant force?
An upward force that acts in the opposite direction of gravity
If the object’s density is greater than the density of a liquid, the objet will _____.
Sink
Why do hot air balloons float?
The pressure inside the balloon is lesser than the air outside the balloone
What happens to pressure as speed increases?
It decreases
