Equations Flashcards
(29 cards)
Wave speed formula
V = f x λ
Wave speed word equation
speed = frequency x wavelength
Frequency units
Hz
Echo calculation formula (remember to divide by 2)
d = s x t
Echo calculation word equation
D = speed x time
Wave speed units
v = m/s
f = hz
λ = m
charge equation
Q=I X t
Charge word equation
Charge = current x time
Charge units and symbols
q = charge c
i = current a
t= s
Cells and polarity rules
If cells have same orientation add voltages
Cells have opposite orientation subtract voltages
Current in a series circuit formula
A1 = A2 = A3
Voltage in a series circuit formula
Vs = V1 + V2
Current in parallel circuit formula
A1 = A2 + A3 = A4
A3 = A4
Voltage in a parallel circuit formula
Vs = V1 = V2 + V3
Ohms law equation
V= IR
Ohms Law word equation
voltage = current x resistance
ohms law units
v = voltage v
I = a
r resistance omega
resistor in series
R = R1 + R2
2 Resistors in Parallel
R1 x R2/ R1+R2
2 equal resistors in parallel
rt = r/2
Electrical energy equation
E = Pt
electrical energy word equation
energy = power x time
energy symbols
e = j or kwh
p = w or kw
t = t or s
cost of electricity (formula)
kilowatt hours x cost of unit
