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Physics Equations P1-4 (Power (POWER p = W/T (work done in j, power in W,…
Physics Equations P1-4
Energy
KINETIC ENERGY Ek = 0.5mv2 (mass in kg, energy in j, speed in m/s2)
GRAVITATIONAL POTENTIAL Ep = mgh (mass in kg, gravitational field strength in N/Kg, height in M)
ELASTIC POTENTIAL Ee = 0.5ke2 (energy in j, spring constant in N/m, extension in m)
SPECIFIC HEAT CAPACTIY change in E = mcdeltaegg (mass in kg, energy in j, specific heat capacity in J/kg degrees C, temperature change in degrees C0
Power
POWER p = W/T (work done in j, power in W, time in S)
POWER p = E/T (power in W, energy transferred in j, time in S)
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ENERGY TRANSFERRED E = QV (energy in j, charge flow in C, pd in V)
POWER P = V x A (power in w, pd in V, current in A)
POWER (if no pd) P = I2R (power in w, current in A, resistance in ohms)
Circuits
POTENTIAL DIFFERENCE V = Current x resistance (pd in v, current in A, resistance in ohms)
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CHARGE FLOW Q = It (charge in C, current in A, time in S)
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MATTER
DENSITY D = mass/volume (density in kg/m3, mass in kg, volume in m3)
SPECIFIC LATENT HEAT E = mL (energy in j, mass in kg, specific latent heat in J/kg)
PRESSURE pV = constant (pressure in Pa, volume in m3)