Q = It - Q = charge in coulombs (C), I = current in amperes (A), t = time in seconds (S), V = IR - V = voltage in volts (V), I = current in amperes (A), R = resistance in ohms (, V1/R1= V2/R2 - V1 = voltage 1 (V), R1= resistance 1 (ohms), V2 = voltage 2 (V), R2 = resistance 2 (ohms), V2 = (R2/R1+R2)Vs - V2 = voltage across resistor 2 (V), R1, R2 = resistances (ohms), Vs = supply voltage (V), RT = R1+R2+.... - RT = total series resistance in ohms R1, R2=resistance values in ohms, 1/RT = 1/R1+1/R2 +... - RT = total parallel resistance in ohms, R1, R2 = resistance values in ohms , P = E/t - P = power in watts (W), E = energy in joules (J), time in seconds (s), P = IV - P = power in watts (W), I = current in amperes (A), V = voltage in volts (V), P = I2R - P = power in watts (W), I = current in amperes (A), R = resistance in ohms (), P = V2/R - P = power in watts (W), V = voltage in volts (V), R = resistance in ohms (), p1V1= p2V2 - p1 = initial pressure in pascals (Pa), V1 initial volume in cubic metres (m3) p2 = final pressure in pascals (Pa), V2 = final volume in cubic metres (m3) , Eh = cm∆T - Eh = heat energy in joules (J), c = specific heat capacity (Jkg-1oC-1), m = mass in kilograms (kg), ∆T = change in temperature (oC), Eh = ml - Eh = heat energy in joules (J), m = mass in kilograms (kg), l = specific latent heat in Jkg-1, p = F/A - p = pressure in pascals (pa), F = force in newtons (N), A = area in square metres (m2), p1/T1 = P2/T2 - p1 = initial pressure in pascals (Pa) T1 = initial temperature in kelvins (K), p2 = final pressure in pascals (Pa), T2 = final temperature in kelvins (K), V1/T1 = V2/T2 - V1 = initial volume (m3), T1 = initial temperature (K), V2 = final volume (m3), T2 = final temperature (K), PV/T = constant P1V1/T1=P2V2/T2 - P1, P2 = initial and final pressure (Pa), V1, V2 = initial and final volume (m3), T1, T2 = temperature in kelvins (K), v = f⋋ - v = wave speed in metres per second (ms-1), f = frequency in hertz (Hz), ⋋= wavelength in metres (m), T = 1/f - T = period in seconds (s), f = frequency in hertz (Hz), f = N/t - f = frequency in hertz (Hz), N = number of waves, t = time in seconds (s), W = mg - W = weight in newtons (N), m = mass in kilograms (kg), g = gravitational field strenghth in newtons per kilogram (Nkg-1),

National 5 Physics formulae

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