Ch. 11 - 8th Grade

pressure

the amount of force exerted per unit area of a surface

pascal

the SI unit of pressure

fluid

any substance that can flow

barometer

an instrument used to measure atmospheric pressure

density

mass/volume

buoyant force

upward force exerted on an object immersed in a fluid

Archimedes' principle

the buoyant force on an object is equal to the weight of the fluid displaced by the object

Pascal's principle

pressure applied to a fluid is transmitted unchanged throughout the fluid

hydraulic system

a device that uses a pressurized fluid acting on pistons of different sizes to increase force

Bernoulli's principle

as the velocity of a fluid increases, the pressure exerted by the fluid decreases

lift

an upward force

Higher elevations have

less pressure

air pressure

the pressure exerted by Earth's atmosphere

flow of smoke up a chimney

Bernoulli's principle and hot air rises

water pressure increases as

depth increases

hydraulic systems can multiply

force

An object will float when weight and buoyant force are

equal

An object will sink if weight is __________ than buoyant force

greater

An object floats best when weight is _______ than buoyant force

less

Liquids and ____________ are fluids

gases

pressure

the amount of force exerted per unit area of a surface

pascal

the SI unit of pressure

fluid

any substance that can flow

barometer

an instrument used to measure atmospheric pressure

density

mass/volume

buoyant force

upward force exerted on an object immersed in a fluid

Archimedes' principle

the buoyant force on an object is equal to the weight of the fluid displaced by the object

Pascal's principle

pressure applied to a fluid is transmitted unchanged throughout the fluid

hydraulic system

a device that uses a pressurized fluid acting on pistons of different sizes to increase force

Bernoulli's principle

as the velocity of a fluid increases, the pressure exerted by the fluid decreases

lift

an upward force

Higher elevations have

less pressure

air pressure

the pressure exerted by Earth's atmosphere

flow of smoke up a chimney

Bernoulli's principle and hot air rises

water pressure increases as

depth increases

hydraulic systems can multiply

force

An object will float when weight and buoyant force are

equal

An object will sink if weight is __________ than buoyant force

greater

An object floats best when weight is _______ than buoyant force

less

Liquids and ____________ are fluids

gases