## AP Physics Formulas 1st Semester

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piccirilloj1  on December 17, 2011

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# AP Physics Formulas 1st Semester

 Coulomb's LawF=kq1q2/r2
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#### Math / Symbols

Coulomb's Law F=kq1q2/r2
Electric Field E=F/q
Electric Potential Energy PE=qV=kq1q2/r
Electric Field between Parallel Plates Eavg=-V/d
Potential due to Point Charge(s) V=kq1/r1+kq2/r2+kq3/r3
Capacitance C=Q/V
Parallel Plate Capacitor C=eA/d
Energy stored in a Capacitor Uc=.5QV=.5CV2
Current I=dQ/dt
Resistance/Resistivity R=rhol/a
Ohm's Law V=IR
Power P=IV
Capacitors in Parallel Cp=C1+C2+C3
Capacitors in Series 1/Cs=1/C1+1/C2+1/C3
Resistors in Series Rs=R1+R2+R3
Resistors in Parallel 1/Rp=1/R1+1/R2+1/R3
Speed of a Wave v=flamda
Index of Refraction n=c/v
Snell's Law nsin=nsin
Critical Angle sinc=n2/n1
Lens/Mirror Equation 1/f=1/di+1/do
Magnification M=hi/ho=-di/do
Focal Length f=.5C
Diffraction dsin=mlamda
Small Angle Approximation dy/L=mlamda
Vf Kinematic vf=vi+at
d kinematic d=vit+.5at2
Vf2 kinematic vf2=vi2+2ad
Centripetal acceleration ac=v2/r
Torque t=rfsintheta
Momentum p=mv
Impulse momentum theorem fdeltat=deltap
Kinetic Energy K=.5mv2
Potential Energy PE=mgh
Power P=fvcostheta
Period of a Pendulum T=2x(l/g).5
Period/frequency relationship T=1/f
Newton's Law of Gravitation Fg=-(Gm1m2)/r2
Gravitational Potential Energy Ug=-(Gm1m2)/r
Density p=m/V
Absolute Pressure P=Po+pgh
Archimedes Principle Fbouy=pVg
Bernoulli's Principle P+pgy+.5pv2=constant
Thermal Expansion deltal=alodeltat
Thermal Conductivity H=kAdeltaT/L
Pressure P=F/A
Kinetic Theorey 3/2kbT
Work(thermodynamics) W=-PdeltaV
1st Thermo Law U=Q+W
2nd Thermo Law e=abs(W/Q)
Carnot Engine ec=(Th-Tc)/Th
Quantum Energy E=hf=pc
Photoelectric Effect Kmax=hf-phi
deBroglie Wavelength wavelength=h/p

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