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AP Physics Formulas

Instructions:

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 efficiency not using work out
(V^2)/r
elastic collision
((Qin) -(Qout))/(Qin)
Q=CV

2. formula for critical angle
(N2)/(N1)
KI/r
dSintheta=mwavelength
(Fn)(mu)

3. formula to find the absoluate pressure at the bottom of a pool
sqrt(3KT/m)
(Patm) + (Pgauge)
roeVg
(Wnet)/(Qin)

4. 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
deltaU -deltaW
h/wavelength
roeVg

5. energy stored in a capacitor
elastic collision
((Th) -(Tl))/(Th)
opposite motion
.5CV^2 or .5 Q^2/C or .5QV

6. formula for impulse involving momentum
deltaU = deltaQ + deltaW
(I^2)R
mV -m(Vo)
opposite motion

7. formula for impluse involving time
.5mV^2 + .5KA^2
mgCostheta(mu)d
1/4wavelength
J= Ft

8. force of frction on an incline
m(v^2)/qvB
mgCostheta(mu)d
opposite motion
GM*M/(r^2)

9. formula for period of a pendulum
e=mc^2
d/2
2Pi * sqrt(l/g)
BA

10. formula for Carnot efficiency
J= Ft
((Th) -(Tl))/(Th)
FV
delta x = (Vo)t + .5at^2

11. formula for height of the block (at the start of a pendulum string) in terms of theta and L
(EMF)Rt/10
GM*M/(r^2)
L -LCostheta
hc/wavelength

12. natural frequency of an open tube of length L
1/2wavelength
qrB/m
.5CV^2 or .5 Q^2/C or .5QV
.5mV^2 + .5KA^2

13. velocity of waves on a string if tension is known
sqrt(T/(m/))
(EMF)Rt/10
G M/((d/2)^2)
d/2

14. isobaric
.5CV^2 or .5 Q^2/C or .5QV
h/mv
(V^2)/r
constant pressure

15. force of gravity between two objects of mass m
rF
(Patm) + (Pgauge)
GM*M/(r^2)
V^2=(Vo)^2 +2a*change in x

16. formula for constructive interference in a thin membrane with two phase changes
MC(deltaT)
roegh
2nt=mwavelength
pL/A

17. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
h/wavelength
mV -m(Vo)
E/B
((Th) -(Tl))/(Th)

18. heat during a cyclic process (net heat)
deltaU -deltaW
no force (right hand rule)
KI/r
qE

19. formula for finding the magnetic field a distance r from a current carrying wire
L -LCostheta
d/2
KI/r
opposite motion

20. formula for the wavelength (debroglie wavelength) of a moving particle
KI/r
(Patm) + (Pgauge)
h/mv
joules/second

21. heat required to change temperature of a substance
perfectly inelastic collision
dSintheta=mwavelength
(V^2)/r
MC(deltaT)

22. new wavelength of light as it enters a new substance
h/mv
qE
L -LCostheta
(No)(wavelength)=(Nn)(new wavelength)

23. the units of current other than amps
Columbs/second
no heat flow
(N2)/(N1)
AV=(A2)(V2)

24. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
(Patm) + (Pgauge)
G M/((d/2)^2)
k|Q|/r^2
h(Fo)

25. pressure
((Qin) -(Qout))/(Qin)
F/A
(I^2)R
opposite motion

26. velocity of a molecule of gas
sqrt(3KT/m)
FV
(Wnet)/(Qin)
no temp change

27. resistance of a wire
(3/2)nRdeltaT
joules/second
K |q||Q|/r^2
pL/A

28. the force on a charge in an electric field
MC(deltaT)
AV=(A2)(V2)
qV
qE

29. formula for finding the momentum of a photon
h/wavelength
deltaU = deltaQ + deltaW
pL/A
sqrt(3KT/m)

30. adibatic
qE
mgCostheta(mu)d
no heat flow
FV

31. units for voltage other than volts
.5KA^2
Joules/Columb
KQ/r
VI

32. force a charge in a Bfield
E/B
G M/((d/2)^2)
e=mc^2
qVB

33. formula equating energy and mass
((Qin) -(Qout))/(Qin)
V+IR
e=mc^2
k|Q|/r^2

34. formula for energy of a spring mass when spring is at maximum displacement
.5KA^2
elastic collision
((Th) -(Tl))/(Th)
VI

35. formula for efficiency of a heat engine using work out
1/((1/C)+(1/C)..........)
sqrt(T/(m/))
(Wnet)/(Qin)
perfectly inelastic collision

36. natural frequency of a closed tube of length L
hc/wavelength
1/4wavelength
frequency never changes for light problems
MC(deltaT)

37. work energy theorum
net work = delta K
rF
Ed=V
inelastic collision

38. focal length of a mirror with radius d
(I^2)RT
d/2
BLv
(1/Do) + (1/Di) = (1/f)

39. voltage induced in a rod moving through a uniform magnetic field
BLv
sqrt(3KT/m)
net work = delta K
h/mv

40. formula for finding magnetic flux
perfectly inelastic collision
dSintheta=mwavelength
BA
mV -m(Vo)

41. first kinematic
0
V = (Vo) + at
d/2
(V^2)/R

42. lens/mirror equation
Q=CV
(1/Do) + (1/Di) = (1/f)
1/2wavelength
MC(deltaT)

43. what direction is friction?
elastic collision
opposite motion
inelastic collision
perfectly inelastic collision

44. electric potential a distance r from a charge
no temp change
inelastic collision
KQ/r
MC(deltaT)

45. equation for the first law of thermodynamics
deltaU = deltaQ + deltaW
opposite motion
L -LCostheta
.5CV^2 or .5 Q^2/C or .5QV

46. change in internal energy during a cyclic process
GM*M/(r^2)
V^2=(Vo)^2 +2a*change in x
roeVg
0

47. electric field in a distance r from a charge
no force (right hand rule)
qV
Joules/Columb
k|Q|/r^2

48. formula for power with Voltage and resistance
(V^2)/R
((Th) -(Tl))/(Th)
h/wavelength
qE

49. heat during an isometric process
(V^2)/R
(I^2)R
n(Cv)(deltaT)
F/A

50. formula for constructive interference in a diffraction grating
pL/A
0
k|Q|/r^2
dSintheta=mwavelength