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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. formula for finding magnetic flux
(Wnet)/(Qin)
2Pi * sqrt(l/g)
BA
no force (right hand rule)

2. the electric force between two objects of charge Q
hc/wavelength
K |q||Q|/r^2
E/B
joules/second

3. new wavelength of light as it enters a new substance
(No)(wavelength)=(Nn)(new wavelength)
(Fn)(mu)
rF
qVB

4. formula relating voltage and electric field
n(Cv)(deltaT)
(I^2)RT
Ed=V
(Wnet)/(Qin)

5. the units of power other than watts
delta x = (Vo)t + .5at^2
(No)(wavelength)=(Nn)(new wavelength)
joules/second
Q=CV

6. formula for power with current and voltage
V+IR
VI
mV -m(Vo)
n(Cv)(deltaT)

7. voltage induced in a rod moving through a uniform magnetic field
L -LCostheta
BLv
frequency never changes for light problems
roeVg

8. electric field in a distance r from a charge
k|Q|/r^2
(Patm) + (Pgauge)
J= Ft
(N2)/(N1)

9. new frequency of light as it enters a new substance
frequency never changes for light problems
Joules/Columb
BA
FV

10. isothermal
n(Cv)(deltaT)
qE
qrB/m
no temp change

11. units for voltage other than volts
qVB
Joules/Columb
no force (right hand rule)
(V^2)/R

12. isometric
(EMF)Rt/10
elastic collision
1/2wavelength
constant volume

13. the units of current other than amps
Columbs/second
hc/wavelength
((Qin) -(Qout))/(Qin)
K |q||Q|/r^2

14. formula for Carnot efficiency
K |q||Q|/r^2
-KA
((Th) -(Tl))/(Th)
n(Cv)(deltaT)

15. pressure
rF
elastic collision
.5mV^2 + .5KA^2
F/A

16. second kinematic
delta x = (Vo)t + .5at^2
BA
(hc/wavelength)=h(Fo) +(Vs)
n(Cv)(deltaT)

17. formula for buoyant force
Columbs/second
V+IR
roeVg
(V^2)/R

18. heat required to melt a substance
MC(deltaT)
M(Lf)
constant pressure
(V^2)/R

19. electric potential a distance r from a charge
qVB
constant pressure
KQ/r
(No)(wavelength)=(Nn)(new wavelength)

20. formula for impulse involving momentum
(Wnet)/(Qin)
mV -m(Vo)
d/2
GM*M/(r^2)

21. total capacitance of capacitors in series
(V^2)/R
frequency never changes for light problems
-KA
1/((1/C)+(1/C)..........)

22. velocity of a molecule of gas
elastic collision
BA
sqrt(3KT/m)
.5mV^2 + .5KA^2

23. force of frction on an incline
GM*M/(r^2)
deltaU = deltaQ + deltaW
(V^2)/r
mgCostheta(mu)d

24. change in internal energy during a cyclic process
((Th) -(Tl))/(Th)
pL/A
deltaU -deltaW
0

25. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
Q=CV
G M/((d/2)^2)
(V^2)/R
(Fn)(mu)

26. formula for period of a pendulum
K |q||Q|/r^2
F/A
2Pi * sqrt(l/g)
(N2)/(N1)

27. formula for charge stored in a capciator
Q=CV
rF
V+IR
.5KA^2

28. heat required to change temperature of a substance
m(v^2)/qvB
mV -m(Vo)
MC(deltaT)
roegh

29. formula for finding the work function of a metal if the cutoff frequency is known
V = (Vo) + at
hc/wavelength
h(Fo)
m(v^2)/qvB

30. formula for energy of a spring mass when spring is at maximum displacement
constant volume
.5KA^2
((Th) -(Tl))/(Th)
n(Cv)(deltaT)

31. EMF of a battery having internal resistance R
V+IR
net work = delta K
deltaU -deltaW
qrB/m

32. velocity of an electrion as it exitws from the hole
(1/Do) + (1/Di) = (1/f)
deltaU = deltaQ + deltaW
M(Lf)
qrB/m

33. formula for torque
1/2wavelength
dSintheta=mwavelength
rF
d/2

34. heat during a cyclic process (net heat)
(V^2)/r
L -LCostheta
deltaU -deltaW
E/B

35. energy stored in a capacitor
no heat flow
(No)(wavelength)=(Nn)(new wavelength)
deltaU = deltaQ + deltaW
.5CV^2 or .5 Q^2/C or .5QV

36. velocity of waves on a string if tension is known
deltaU -deltaW
.5KA^2
sqrt(T/(m/))
sqrt(3KT/m)

37. 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
no temp change
qV
h(Fo)

38. formula for constructive interference in a diffraction grating
((Qin) -(Qout))/(Qin)
VI
dSintheta=mwavelength
(Patm) + (Pgauge)

39. isobaric
constant pressure
rF
deltaU = deltaQ + deltaW
no force (right hand rule)

40. lens/mirror equation
0
no temp change
d/2
(1/Do) + (1/Di) = (1/f)

41. natural frequency of an open tube of length L
1/2wavelength
.5KA^2
(Wnet)/(Qin)
V+IR

42. resistance of a wire
roeVg
pL/A
sqrt(3KT/m)
h/wavelength

43. force a charge in a Bfield
no temp change
qE
qV
qVB

44. formula for finding the energy required to move a charged particle from infinity to a point a certain distance away from a charged particle
roeVg
no heat flow
FV
qV

45. snells law
J= Ft
roeVg
nSintheta=nsintheta
d/2

46. hooke's law force of a spring
mgCostheta(mu)d
(Wnet)/(Qin)
-KA
d/2

47. formula for change in internal energy in a cosnstat volume PV process
(3/2)nRdeltaT
inelastic collision
BLv
(I^2)RT

48. type of collision where K is conserved
Ed=V
elastic collision
no heat flow
F/A

49. energy of a photon if wavelength is known
hc/wavelength
((Th) -(Tl))/(Th)
qV
M(Lf)

50. formula for efficiency not using work out
V = (Vo) + at
no temp change
rF
((Qin) -(Qout))/(Qin)

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AP Physics Formulas

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