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Science Fluid Stuff
Science fluid displacement, floating, sinking, density, and more
Question | Answer |
---|---|
weight | the force of gravity acting on an object |
mass | the amount of matter that makes up an object or substance |
volume | the amount of space an object or substance takes up |
displace | to take the place of |
density | a measure of the mass per unit volume of a substance |
characteristic property | a property that makes a particular substance distinct from others |
buoyancy | the upward supportive force on an object in a fluid |
swim bladder | a controllable, balloon-like chamber that allows fish to alter their buoyancy |
ballast tanks | compartments in a ship or submarine that take in water to keep the ship stable or help a submarine dive below the surface |
pressure (scientifi c defi nition) | the force per unit area |
pressure formula | force/area |
pressure measured in | pascals(Pa)1 Pa = 1 N/m2 |
atmospheric pressure | the force the atmosphere exerts on a unit of surface area |
Pascal’s Law | states that a force applied to a fluid is distributed equally through all parts of the fluid |
compress | to pack closely together; squeeze |
compressibility | the ability to be squeezed into a smaller volume |
pneumatic system | a system that uses gases under pressure |
hydraulic system | a system that uses liquids under pressure |
Hydraulic and pneumatic fluid systems consist 1 | a pump (sometimes including cylinders and pistons) forces fluids through a system • conductors (tubing, hoses, or pipes) provide a pathway to carry the fluid |
Hydraulic and pneumatic fluid systems consist 2 | valves keep the fluid moving in the desired direction at the desired time • a pressure gauge monitors pressure within the system Each component has its own job to do |
density formula | mass/volume |