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AP Physics Formulas

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. velocity of waves on a string if tension is known
h/wavelength
sqrt(T/(m/))
.5mV^2 + .5KA^2
(V^2)/R

2. electric potential a distance r from a charge
n(Cv)(deltaT)
hc/wavelength
1/4wavelength
KQ/r

3. formula for power with current and voltage
(V^2)/r
VI
perfectly inelastic collision
joules/second

4. formula for finding the momentum of a photon
(3/2)nRdeltaT
h/wavelength
V^2=(Vo)^2 +2a*change in x
MC(deltaT)

5. electric field in a distance r from a charge
.5CV^2 or .5 Q^2/C or .5QV
constant volume
G M/((d/2)^2)
k|Q|/r^2

6. new wavelength of light as it enters a new substance
opposite motion
Columbs/second
BLv
(No)(wavelength)=(Nn)(new wavelength)

7. formula for critical angle
.5CV^2 or .5 Q^2/C or .5QV
(N2)/(N1)
2Pi * sqrt(l/g)
constant volume

8. what direction is friction?
perfectly inelastic collision
mV -m(Vo)
net work = delta K
opposite motion

9. formula relating voltage and electric field
(Patm) + (Pgauge)
Ed=V
Joules/Columb
constant pressure

10. formula for efficiency of a heat engine using work out
qVB
Columbs/second
(Wnet)/(Qin)
(1/Do) + (1/Di) = (1/f)

11. formula for constructive interference in a diffraction grating
m(v^2)/qvB
V = (Vo) + at
dSintheta=mwavelength
(hc/wavelength)=h(Fo) +(Vs)

12. formula equating energy and mass
-KA
G M/((d/2)^2)
VI
e=mc^2

13. formula for finding the work function of a metal if the cutoff frequency is known
F/A
h(Fo)
(Wnet)/(Qin)
net work = delta K

14. second kinematic
sqrt(T/(m/))
E/B
delta x = (Vo)t + .5at^2
elastic collision

15. units for voltage other than volts
Joules/Columb
GM*M/(r^2)
.5mV^2 + .5KA^2
h(Fo)

16. magnification equation
roeVg
constant pressure
BA
(Di)/(Do) or (Hi)/(Ho)

17. forgotten power equation
roegh
J= Ft
(Di)/(Do) or (Hi)/(Ho)
FV

18. formula for Carnot efficiency
opposite motion
M(Lf)
m(v^2)/qvB
((Th) -(Tl))/(Th)

19. natural frequency of a closed tube of length L
no heat flow
(No)(wavelength)=(Nn)(new wavelength)
G M/((d/2)^2)
1/4wavelength

20. first kinematic
(No)(wavelength)=(Nn)(new wavelength)
roeVg
V = (Vo) + at
h/wavelength

21. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
constant pressure
deltaU = deltaQ + deltaW
E/B
(EMF)Rt/10

22. heat required to change temperature of a substance
(V^2)/r
F/A
mV -m(Vo)
MC(deltaT)

23. equation for the first law of thermodynamics
(hc/wavelength)=h(Fo) +(Vs)
(I^2)R
deltaU = deltaQ + deltaW
sqrt(3KT/m)

24. formula for the wavelength (debroglie wavelength) of a moving particle
1/2wavelength
h/mv
(No)(wavelength)=(Nn)(new wavelength)
d/2

25. pressure
(hc/wavelength)=h(Fo) +(Vs)
F/A
.5KA^2
opposite motion

26. focal length of a mirror with radius d
d/2
(EMF)Rt/10
h(Fo)
(hc/wavelength)=h(Fo) +(Vs)

27. force of gravity between two objects of mass m
GM*M/(r^2)
elastic collision
delta x = (Vo)t + .5at^2
perfectly inelastic collision

28. the force on a charge moving parallel to a magnetic field
KQ/r
no force (right hand rule)
no temp change
k|Q|/r^2

29. force a charge in a Bfield
(I^2)RT
h/mv
qVB
V+IR

30. formula for charge stored in a capciator
.5mV^2 + .5KA^2
BLv
(No)(wavelength)=(Nn)(new wavelength)
Q=CV

31. the units of power other than watts
qrB/m
h/wavelength
V+IR
joules/second

32. EMF of a battery having internal resistance R
2Pi * sqrt(l/g)
BA
GM*M/(r^2)
V+IR

33. voltage induced in a rod moving through a uniform magnetic field
sqrt(3KT/m)
no heat flow
-KA
BLv

34. energy of a photon if wavelength is known
1/((1/C)+(1/C)..........)
VI
hc/wavelength
frequency never changes for light problems

35. work energy theorum
F/A
net work = delta K
1/2wavelength
qrB/m

36. formula for energy of a spring mass when spring is at maximum displacement
nSintheta=nsintheta
qV
.5KA^2
delta x = (Vo)t + .5at^2

37. energy stored in a capacitor
GM*M/(r^2)
(I^2)RT
FV
.5CV^2 or .5 Q^2/C or .5QV

38. snells law
2Pi * sqrt(l/g)
(Patm) + (Pgauge)
nSintheta=nsintheta
h/wavelength

39. formula for power with current and resistance
hc/wavelength
(Patm) + (Pgauge)
m(v^2)/qvB
(I^2)R

40. formula for finding the energy required to move a charged particle from infinity to a point a certain distance away from a charged particle
qV
(V^2)/r
m(v^2)/qvB
Joules/Columb

41. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
.5CV^2 or .5 Q^2/C or .5QV
G M/((d/2)^2)
L -LCostheta
(Di)/(Do) or (Hi)/(Ho)

42. formula for current through the resistor when the ten coils are removed from the B field in an amount of time t
mV -m(Vo)
BA
(EMF)Rt/10
deltaU -deltaW

43. formula for impluse involving time
sqrt(3KT/m)
J= Ft
k|Q|/r^2
(No)(wavelength)=(Nn)(new wavelength)

44. force of frction on an incline
qrB/m
mgCostheta(mu)d
Ed=V
.5mV^2 + .5KA^2

45. type of collision where K is conserved
V = (Vo) + at
elastic collision
M(Lf)
F/A

46. formula for height of the block (at the start of a pendulum string) in terms of theta and L
L -LCostheta
dSintheta=mwavelength
nSintheta=nsintheta
frequency never changes for light problems

47. formula for finding magnetic flux
2nt=mwavelength
(EMF)Rt/10
BA
no temp change

48. formula for energy of a spring mass when spring is neither at maximum displacement nor at equilibrium
hc/wavelength
.5mV^2 + .5KA^2
(No)(wavelength)=(Nn)(new wavelength)
(N2)/(N1)

49. formula for change in internal energy in a cosnstat volume PV process
dSintheta=mwavelength
deltaU -deltaW
no heat flow
(3/2)nRdeltaT

50. lens/mirror equation
(1/Do) + (1/Di) = (1/f)
(Wnet)/(Qin)
0
k|Q|/r^2

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AP Physics Formulas

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