Formulas and Units

Question 1

Energy transferred, charge and voltage

Answer 1

E(J) = Q(c) x V(v)

Question 2

Voltage, current and resistance

Answer 2

V(v) = I(a) x R(Ω)

Question 3

Power, current and voltage

Answer 3

P(W) = I(a) x V(v)
also P = I^2R

Question 4

Energy transferred, current. voltage and time

Answer 4

E(J) = I(a) x V(v) x t(s)
since It = Q and E = Q x V

Question 5

1W, 1000W, 1,000,000W

Answer 5

Watt, Kilowatt, Megawatt

Question 6

Work Done, Force and Distance

Answer 6

W(J) = F(N) x d(m)

Question 7

GPE =

Answer 7

mgh

Question 8

KE =

Answer 8

1/2 x m x v^2

Question 9

Power, Work Done and Time taken

Answer 9

P(W) = W(J)/T(s) or P = E/T

Question 10

Final speed, initial speed, acceleration and distance moved

Answer 10

v^2 = u^2 - 2as

Question 11

Density, mass and volume

Answer 11

P(denoted in pho - kg/m^3 or g/cm^3) = m(kg)/v(m^3)

Question 12

Pressure, force and area

Answer 12

P(Pa) = F(N)/A(m^2)

Question 13

Pressure difference, height, density and gravitational force

Answer 13

p(pressure diff.) = h(m) x p(density) x g(N/m)

Question 14

Initial and final pressure and temp

Answer 14

P1/T1(K) = P2/T2 at a fixed mass of gas at a constant volume
MAKE SURE TEMPERATURE IS IN KELVIN

Question 15

Initial pressure and volume

Answer 15

p1V1 = p2V2

Question 16

Converting Kelvin to Celsius

Answer 16

T(K) = T(C) + 273