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# Physics Formulas

TermDefinition
frequency f=1/T
period T=1/f
wavelength lambda=c/f
density p=mass/volume
pressure P=force/area
power W=work/time
intensity I=power/beam area
impedance Z=p x c
conservation of energy Ii = Ir + It
total attenuation a=ac x l
half intensity depth Dcm=3dB/ac
partner of Mega is: micro
partner of Kilo is: milli
partner of Hecto is: centi
units of frequency are: Hz, KHz, MHz
units for period are: sec, msec, usec
units for wavelength are: m, cm, mm
units for density are: Kg/m cubed, g/cm cubed, g/mL
units for pressure are: newton/cm squared, Pascal, Torr, mmHg, lbs/in squared
units for power are: Watt, mWatt, KWatt, Joule/sec
unit for intensity is: Watt/cm squared
units for impedance are: RAYL, MRAYL
Created by: ginaliane

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