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AP Physics Formulas

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Answer 50 questions in 15 minutes.
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1. EMF of a battery having internal resistance R
V+IR
pL/A
hc/wavelength
(Fn)(mu)

2. formula equating energy and mass
e=mc^2
V+IR
nSintheta=nsintheta
constant volume

3. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
(N2)/(N1)
E/B
pL/A
opposite motion

4. hooke's law force of a spring
Ed=V
sqrt(3KT/m)
-KA
V+IR

5. type of collision where K is conserved
.5mV^2 + .5KA^2
elastic collision
(Wnet)/(Qin)
no heat flow

6. isometric
AV=(A2)(V2)
1/((1/C)+(1/C)..........)
k|Q|/r^2
constant volume

7. the units of power other than watts
opposite motion
pL/A
d/2
joules/second

8. work energy theorum
net work = delta K
constant pressure
qVB
2nt=mwavelength

9. lens/mirror equation
(hc/wavelength)=h(Fo) +(Vs)
M(Lf)
constant volume
(1/Do) + (1/Di) = (1/f)

10. focal length of a mirror with radius d
d/2
qE
Ed=V
1/4wavelength

11. resistance of a wire
V = (Vo) + at
pL/A
2Pi * sqrt(l/g)
(V^2)/r

12. formula for change in internal energy in a cosnstat volume PV process
(3/2)nRdeltaT
V = (Vo) + at
constant pressure
E/B

13. formula for height of the block (at the start of a pendulum string) in terms of theta and L
(V^2)/R
(Patm) + (Pgauge)
L -LCostheta
0

14. natural frequency of a closed tube of length L
Ed=V
BA
mV -m(Vo)
1/4wavelength

15. formula for efficiency of a heat engine using work out
(Wnet)/(Qin)
perfectly inelastic collision
inelastic collision
dSintheta=mwavelength

16. force a charge in a Bfield
no temp change
dSintheta=mwavelength
qrB/m
qVB

17. forgotten power equation
constant volume
delta x = (Vo)t + .5at^2
M(Lf)
FV

18. heat required to melt a substance
(Di)/(Do) or (Hi)/(Ho)
qrB/m
((Th) -(Tl))/(Th)
M(Lf)

19. formula for energy of a spring mass when spring is neither at maximum displacement nor at equilibrium
1/2wavelength
V = (Vo) + at
qE
.5mV^2 + .5KA^2

20. heat during an isometric process
2Pi * sqrt(l/g)
n(Cv)(deltaT)
roeVg
BLv

21. second kinematic
no heat flow
K |q||Q|/r^2
nSintheta=nsintheta
delta x = (Vo)t + .5at^2

22. type of collision where objects stick togerther
Q=CV
joules/second
2nt=mwavelength
perfectly inelastic collision

23. third kinematic
elastic collision
V^2=(Vo)^2 +2a*change in x
2Pi * sqrt(l/g)
V = (Vo) + at

24. what direction is friction?
(Fn)(mu)
no force (right hand rule)
opposite motion
.5CV^2 or .5 Q^2/C or .5QV

25. first kinematic
(1/Do) + (1/Di) = (1/f)
V = (Vo) + at
(3/2)nRdeltaT
KI/r

26. energy stored in a capacitor
.5CV^2 or .5 Q^2/C or .5QV
(3/2)nRdeltaT
KI/r
qE

27. formula for finding the stopping potential of a metal for a wavelength if the cutoff frequency is known
(hc/wavelength)=h(Fo) +(Vs)
.5CV^2 or .5 Q^2/C or .5QV
h/wavelength
net work = delta K

28. force of friction
(Fn)(mu)
d/2
h(Fo)
KI/r

29. radius of curvature of a charged particle as it enters a uniform magnetic field
h/wavelength
m(v^2)/qvB
inelastic collision
qE

30. formula used to find the heat generated by a resistor after a certain amount of time if the current through the resistor is known
(I^2)RT
(Fn)(mu)
(Wnet)/(Qin)
sqrt(3KT/m)

31. formula for period of a pendulum
.5CV^2 or .5 Q^2/C or .5QV
qV
2Pi * sqrt(l/g)
E/B

32. velocity of waves on a string if tension is known
sqrt(T/(m/))
V^2=(Vo)^2 +2a*change in x
delta x = (Vo)t + .5at^2
no force (right hand rule)

33. formula for constructive interference in a thin membrane with two phase changes
(V^2)/r
(hc/wavelength)=h(Fo) +(Vs)
E/B
2nt=mwavelength

34. formula for power with current and resistance
Columbs/second
k|Q|/r^2
(I^2)R
roegh

35. voltage induced in a rod moving through a uniform magnetic field
BLv
J= Ft
VI
1/((1/C)+(1/C)..........)

36. new frequency of light as it enters a new substance
frequency never changes for light problems
deltaU -deltaW
Ed=V
roegh

37. equation of continuity
delta x = (Vo)t + .5at^2
(Fn)(mu)
pL/A
AV=(A2)(V2)

38. formula for the wavelength (debroglie wavelength) of a moving particle
k|Q|/r^2
sqrt(3KT/m)
h/mv
h/wavelength

39. formula for constructive interference in a diffraction grating
(Patm) + (Pgauge)
no heat flow
V = (Vo) + at
dSintheta=mwavelength

40. formula for impulse involving momentum
Columbs/second
mV -m(Vo)
AV=(A2)(V2)
e=mc^2

41. heat during a cyclic process (net heat)
deltaU -deltaW
h(Fo)
FV
e=mc^2

42. units for voltage other than volts
mV -m(Vo)
1/((1/C)+(1/C)..........)
Joules/Columb
frequency never changes for light problems

43. magnification equation
k|Q|/r^2
qV
(Di)/(Do) or (Hi)/(Ho)
-KA

44. formula for current through the resistor when the ten coils are removed from the B field in an amount of time t
(EMF)Rt/10
h/mv
e=mc^2
V = (Vo) + at

45. isobaric
perfectly inelastic collision
(N2)/(N1)
2Pi * sqrt(l/g)
constant pressure

46. electric potential a distance r from a charge
qrB/m
F/A
KQ/r
pL/A

47. formula relating voltage and electric field
1/2wavelength
no temp change
Ed=V
BLv

48. isothermal
AV=(A2)(V2)
G M/((d/2)^2)
no temp change
KQ/r

49. natural frequency of an open tube of length L
V+IR
no force (right hand rule)
1/2wavelength
J= Ft

50. type of collision where K is not conserved
((Qin) -(Qout))/(Qin)
inelastic collision
mgCostheta(mu)d
(Fn)(mu)

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AP Physics Formulas

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