SI Units, Constants, and prefixes Flashcards
distance
d = meters = m
mass
m = kilograms = kg
time
t = seconds = s
velocity/speed
v = meters/second = m/s
acceleration
a = meters/second squared = m/s^2
force
F = newtons = N
torque
τ = newton-meters = N•m
Vector!
momentum
ρ = kg•m/s
impulse
J = newton-seconds = N•s
work
W = joules = J = kg•m^2/s^2
energy
KE/PE/E = joules = J = kg•m^2/s^2
power
P = watts = W = J/s
pressure
P = pascals = Pa = N/m^2
density
ρ = kilograms per cubic meter = kg/m^3
flow rate
f = m^3/s
electric charge
q = coulombs = C
electric field
E = Newtons per coulomb = N/C (or volts per meter = V/m)
electric potential
φ = volts = V = J/C
voltage
V = volts = J/C
current
I = amps = A = C/s
resistance
R = ohms = Ω = V/A
resistivity
ρ = ohm-meters = Ω•m
capacitance
C = farads = F = C/V
magnetic field
B = tesla = T = N/A•m
frequency
f = hertz = Hz = s^-1
period
T = seconds = s
sound level
β = decibals = dB
lens power
P = diopters = D = m^-1
gravity
10 m/s^2
density of water
ρ = 1000kg/m^3 = 1g/cm^3
elementary electric charge
e = 1.6x10^-19 C
Coulomb’s constant
k = 9x10^9 N•m^2/C^2
threshold of human hearing
I = 10^-12 W/m^2
speed of light in a vacuum
v = 3x10^8 m/s
pico
p = 10^-12
nano
n = 10^-9
micro
μ = 10^-6
milli
m = 10^-3
centi
c = 10^-2
kilo
k = 10^3
mega
M = 10^6
giga
G = 10^9
speed of sound
340 m/s (in air)
