Science chapter 4 Maps | Quizlet

the ability to do work , more energy = more work : unit - J

Energy :

energy from reaction between substances . Electricity from fossil fuels burning ( combustion ) of oil : very polluting ( non renewable )

chemical

energy found in a circuit , supplied by a battery.non renewable

electrical

energy from the sun . No pollution ( renewable )

solar

energy released by the splitting of an atom ex ) Uranium ground pollution , nuclear waste . ( non renewable )

nuclear

mechanical

energy due to the motion of an object . renewable

mechanical

energy from the motion of water . water pollution flooding ( renewable )

hydro

energy from the motion of a mass of air . Clean ( renewable )

wind

energy associated with the motion of atoms or molecules . Heat is a form of waste energy . Non renewable

heat

energy associated with the motion of air molecules . renewable

sound

Heat Oxygen Fuel

The Fire Triangle :

1) a spark or high enough temperature to begin combustion 2) necessary for combustion to occur 3) substance that has the ability to burn . Ex ) fossil fuels wood , metals etc.

Step for fire triangle

Oxygen

which part of the fire triangle is removed for the following situations . Fire extinguisher on a flame .

Heat

which part of the fire triangle is removed for the following situations . Water poured on a flame .

1. V = 1 x R

2. P = 1x V

3. E = Pxt

electrical system formulas :

Kw—w x1000 kw —- w divide 1000

Energy in kilowatt * hours : kwh

% eff = ( Energy out useful

/ Energy in ) X 100

Percent Efficiency