Formulas and Units Flashcards
Energy transferred, charge and voltage
E(J) = Q(c) x V(v)
Voltage, current and resistance
V(v) = I(a) x R(Ω)
Power, current and voltage
P(W) = I(a) x V(v)
also P = I^2R
Energy transferred, current. voltage and time
E(J) = I(a) x V(v) x t(s)
since It = Q and E = Q x V
1W, 1000W, 1,000,000W
Watt, Kilowatt, Megawatt
Work Done, Force and Distance
W(J) = F(N) x d(m)
GPE =
mgh
KE =
1/2 x m x v^2
Power, Work Done and Time taken
P(W) = W(J)/T(s) or P = E/T
Final speed, initial speed, acceleration and distance moved
v^2 = u^2 - 2as
Density, mass and volume
P(denoted in pho - kg/m^3 or g/cm^3) = m(kg)/v(m^3)
Pressure, force and area
P(Pa) = F(N)/A(m^2)
Pressure difference, height, density and gravitational force
p(pressure diff.) = h(m) x p(density) x g(N/m)
Initial and final pressure and temp
P1/T1(K) = P2/T2 at a fixed mass of gas at a constant volume
MAKE SURE TEMPERATURE IS IN KELVIN
Initial pressure and volume
p1V1 = p2V2