1C is equal to
6.24*10^18 electrons
pC is equal to
10^-12C
nC is equal to
10^-9C
uC is equal to
10^-6
Coulomb’s law
F = k * (abs(q_1 * q_2) / r^2)
Coulomb’s constant is equal to
8.99 * 10^9 N*m^2/C^2
wave frequency (f) =
1/Period(T)
wave speed (v) =
frequency x wavelength
V_wave of string =
sqrt(T*L/m)
frequency of wave in a string =
1/(2L)* sqrt((TL)/m)
Speed of sound in air in temp less than or equal to 20 formula
331.45 + 0.6Tc
Speed of sound in air in temp more than 20 formula
331.45 * sqrt(Tk / 273)
farenheit to Celcius formula
C = 5/9 * (F - 32)
Celcius to farenheit formula
F = 9/5 * C + 32
1Hz =
1/s
1N =
1kg*m/s^2
Celcius to kelvin
K = C + 273.15
Wave frequency=
1/Period(T)
Doppler effect formula
f * [(v +- v_o) / (v +- v_s)]
Doppler effect formula when source is moving towards a stationary observer
f * [ v / (v - v_s)]
Doppler effect when source is moving away from the observer at rest
f * [v / (v + v_s)]
Observer moving towards a stationary source
f * [(v + v_o) / v ]
Speed of sound
343 m/s
