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AP Physics Formulas

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Answer 50 questions in 15 minutes.
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1. the units of power other than watts
K |q||Q|/r^2
sqrt(T/(m/))
J= Ft
joules/second

2. 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
opposite motion
1/2wavelength
V = (Vo) + at

3. new frequency of light as it enters a new substance
(I^2)RT
.5mV^2 + .5KA^2
(Wnet)/(Qin)
frequency never changes for light problems

4. the electric force between two objects of charge Q
K |q||Q|/r^2
opposite motion
GM*M/(r^2)
k|Q|/r^2

5. formula for critical angle
.5KA^2
(N2)/(N1)
1/4wavelength
k|Q|/r^2

6. heat required to melt a substance
mgCostheta(mu)d
M(Lf)
(N2)/(N1)
((Qin) -(Qout))/(Qin)

7. electric potential a distance r from a charge
BLv
KQ/r
qVB
V+IR

8. EMF of a battery having internal resistance R
V+IR
(Patm) + (Pgauge)
F/A
2Pi * sqrt(l/g)

9. formula equating energy and mass
k|Q|/r^2
dSintheta=mwavelength
e=mc^2
MC(deltaT)

10. heat during an isometric process
(Patm) + (Pgauge)
n(Cv)(deltaT)
.5mV^2 + .5KA^2
V^2=(Vo)^2 +2a*change in x

11. formula for torque
(I^2)R
h/wavelength
h(Fo)
rF

12. formula for finding the stopping potential of a metal for a wavelength if the cutoff frequency is known
deltaU -deltaW
.5mV^2 + .5KA^2
opposite motion
(hc/wavelength)=h(Fo) +(Vs)

13. formula for height of the block (at the start of a pendulum string) in terms of theta and L
e=mc^2
(EMF)Rt/10
L -LCostheta
(hc/wavelength)=h(Fo) +(Vs)

14. force of friction
(Fn)(mu)
net work = delta K
F/A
(1/Do) + (1/Di) = (1/f)

15. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
V = (Vo) + at
E/B
1/4wavelength
qV

16. formula for power with current and resistance
(3/2)nRdeltaT
mgCostheta(mu)d
V^2=(Vo)^2 +2a*change in x
(I^2)R

17. equation of continuity
AV=(A2)(V2)
.5KA^2
mgCostheta(mu)d
qVB

18. units for voltage other than volts
Joules/Columb
perfectly inelastic collision
((Qin) -(Qout))/(Qin)
1/4wavelength

19. formula for the wavelength (debroglie wavelength) of a moving particle
pL/A
h/mv
mV -m(Vo)
sqrt(T/(m/))

20. formula for energy of a spring mass when spring is at maximum displacement
MC(deltaT)
constant volume
sqrt(3KT/m)
.5KA^2

21. formula for charge stored in a capciator
sqrt(3KT/m)
F/A
qE
Q=CV

22. isobaric
constant pressure
d/2
(No)(wavelength)=(Nn)(new wavelength)
qV

23. formula for finding the magnetic field a distance r from a current carrying wire
no temp change
KI/r
constant volume
deltaU = deltaQ + deltaW

24. natural frequency of an open tube of length L
BA
F/A
1/2wavelength
(Wnet)/(Qin)

25. formula for finding magnetic flux
h/mv
delta x = (Vo)t + .5at^2
Joules/Columb
BA

26. change in internal energy during a cyclic process
0
1/4wavelength
dSintheta=mwavelength
roegh

27. the force on a charge moving parallel to a magnetic field
no force (right hand rule)
0
2Pi * sqrt(l/g)
(Wnet)/(Qin)

28. snells law
deltaU -deltaW
nSintheta=nsintheta
frequency never changes for light problems
constant volume

29. isometric
Ed=V
V = (Vo) + at
joules/second
constant volume

30. force of frction on an incline
mgCostheta(mu)d
qrB/m
1/2wavelength
FV

31. type of collision where objects stick togerther
KI/r
perfectly inelastic collision
.5CV^2 or .5 Q^2/C or .5QV
h/mv

32. velocity of waves on a string if tension is known
sqrt(T/(m/))
delta x = (Vo)t + .5at^2
(I^2)R
KQ/r

33. formula to find the gauge pressure at the bottom of a pool
roegh
BLv
joules/second
1/4wavelength

34. adibatic
no heat flow
rF
deltaU = deltaQ + deltaW
sqrt(T/(m/))

35. formula for period of a pendulum
pL/A
2Pi * sqrt(l/g)
(V^2)/R
.5mV^2 + .5KA^2

36. formula for centripetal acceleration
h(Fo)
mgCostheta(mu)d
rF
(V^2)/r

37. formula for impluse involving time
V^2=(Vo)^2 +2a*change in x
(1/Do) + (1/Di) = (1/f)
sqrt(3KT/m)
J= Ft

38. type of collision where K is conserved
frequency never changes for light problems
no force (right hand rule)
(Patm) + (Pgauge)
elastic collision

39. heat required to change temperature of a substance
MC(deltaT)
(EMF)Rt/10
1/2wavelength
VI

40. formula for constructive interference in a diffraction grating
inelastic collision
Ed=V
perfectly inelastic collision
dSintheta=mwavelength

41. heat during a cyclic process (net heat)
G M/((d/2)^2)
deltaU -deltaW
KQ/r
h(Fo)

42. second kinematic
(1/Do) + (1/Di) = (1/f)
no force (right hand rule)
delta x = (Vo)t + .5at^2
(I^2)R

43. the force on a charge in an electric field
net work = delta K
qE
Ed=V
.5mV^2 + .5KA^2

44. isothermal
.5mV^2 + .5KA^2
KQ/r
no temp change
MC(deltaT)

45. force of gravity between two objects of mass m
VI
GM*M/(r^2)
roeVg
nSintheta=nsintheta

46. total capacitance of capacitors in series
1/((1/C)+(1/C)..........)
(N2)/(N1)
opposite motion
k|Q|/r^2

47. formula for constructive interference in a thin membrane with two phase changes
mV -m(Vo)
Columbs/second
2Pi * sqrt(l/g)
2nt=mwavelength

48. formula for buoyant force
roeVg
E/B
rF
V+IR

49. force a charge in a Bfield
qVB
net work = delta K
2Pi * sqrt(l/g)
(I^2)R

50. equation for the first law of thermodynamics
deltaU = deltaQ + deltaW
no heat flow
nSintheta=nsintheta
Joules/Columb

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AP Physics Formulas

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