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21 Cards in this Set
- Front
- Back
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What is buoyancy
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when an object is submerged in fluid, a force is created which acts upward and is equal to the weight of the fluid displaced by the volume of the object
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What is velocity
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speed of an object moving in a certain direction. velocities add
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what is the formula to find velocity
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velocity= distance/time
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what is the definition of work
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using a small force over a long distance, you exert a larger force over a short distance
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what is the formila to find the amount of work needed/done
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work = (force) x (distance)
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Work put in equals work coming out. how do you find efficiency
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efficiency = Wout/Win
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What is is pressure
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a force actin on a surface
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How do you find the amount of pressure
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pressure = force/area
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what is hydrostatic pressure
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pressure in liquids that are not moving , which is caused by gravity
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how do you calculate hydrostatic pressure
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hydrostatic pressure + atomspheric pressure =total pressure
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what are three ways heat can be transferrer
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conduction, convection, or radiation
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Explain conduction
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happens in solids or stationary fluids
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explain convection
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occurs in liquids and gasses by circulating currents caused by difference in density
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do electrical forces increase as the distance between charged particles increases
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no, they decrease
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what is a resistor
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dissipate energy through heat
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what is a capacitor
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stores electrical energy between two parallel plates
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what is an inductor
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stores magnectic energy
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what are diodes
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restricts current only to one direction. A semiconductor is a rectifer
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what does a rectifier do
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convers AC to DC
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transformer
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userd to conver electricity from one voltage to another
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how can you calculate the mechanical advantage of a lever
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MA = effort arm/ resisting arm
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