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21 Cards in this Set
 Front
 Back
What is buoyancy

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


What is velocity

speed of an object moving in a certain direction. velocities add


what is the formula to find velocity

velocity= distance/time


what is the definition of work

using a small force over a long distance, you exert a larger force over a short distance


what is the formila to find the amount of work needed/done

work = (force) x (distance)


Work put in equals work coming out. how do you find efficiency

efficiency = Wout/Win


What is is pressure

a force actin on a surface


How do you find the amount of pressure

pressure = force/area


what is hydrostatic pressure

pressure in liquids that are not moving , which is caused by gravity


how do you calculate hydrostatic pressure

hydrostatic pressure + atomspheric pressure =total pressure


what are three ways heat can be transferrer

conduction, convection, or radiation


Explain conduction

happens in solids or stationary fluids


explain convection

occurs in liquids and gasses by circulating currents caused by difference in density


do electrical forces increase as the distance between charged particles increases

no, they decrease


what is a resistor

dissipate energy through heat


what is a capacitor

stores electrical energy between two parallel plates


what is an inductor

stores magnectic energy


what are diodes

restricts current only to one direction. A semiconductor is a rectifer


what does a rectifier do

convers AC to DC


transformer

userd to conver electricity from one voltage to another


how can you calculate the mechanical advantage of a lever

MA = effort arm/ resisting arm
