pressure and hydrauloics Flashcards
define force
anything that causes an object to change in motion
what is gravity
force that acts down (center of the earth)
what is buoyancy
tendency for materials to rise or float in fluids
define buoyancy force
upwards force exerted on objects submerged in fluids
what is the symbol for buoyant force
capital F with a capital B in a smaller font
what are the units for buoyant force
N
what happens to gravity when you have a strong buoyant force
it means that the gravity is weak
what is Archimedes principle
buoyant force acting on an object equal’s the weight of the displaced fluids
explain how hot air balloons use the principle of buoyancy
it uses a gas that is less dense than the air and it allows the balloon to raise
what is average density
total mass of all materials enclosed in an object by its total volume
what is hydrometer
a tool that is designed to measure the density of a liquid.
what is pressure
it is a measure of the force acting perpendicular to a unit or area
what are the units for pressure
Pa
what is pascals law
it states when pressure is exerted on one part of a fluid the same pressure is transmitted to all parts of the fluid
what is compressibility
the ability to press gases into a smaller volume
