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26 terms

Science

STUDY
PLAY
Formula for PE
GPE (J) = weight (N) x height (M)
Formula for KE
KE = 1/2 MV²
Law of Conservation of Energy
energy neither created nor destroyed, only transformed or transferred. Energy absorbed = energy released
Energy efficiency
Ratio of useful energy to total energy
Energy Conservation
Saving total amount of energy to begin with
TE (not def)
KE increases, TE increases, temp increases, only 40% usuable
Transfer
moves from 1 place to another
Transformation
changes from 1 type to another
Qualitative
subjective, descriptions
Quantitative
objective, measurements, real numbers
Precision
set of numbers close to one another
Accuracy
numbers closest to the true value
GPE
stored energy due to object being above ground
Friction
force on objects/substances in contact; resists motion
Heat
movement of TE from hot to cold (b/c of temp dif)
Temperature
measure of average energy per molecule
Scientific Law
any theory not disproven (disproved)
Chemical (PE)
energy stored in bonds of atoms
Light (KE)
energy transferred by rapid movement of electromagnetic fields
Sound KE
energy transferred by vibration of object
Nuclear PE
energy stored in nucleus of atoms
Elastic PE
energy stored by stretching or compresion
Electric (static) PE
energy stored by buildup of charges (electrons or ions)
Electric (current) KE
movement of charge/energy from 1 place to another
Conduction
process by which energy is transferred dicrectly when materials touch
Conductor
Materials w/structure that easily allows energy transfer (ex. copper)