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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.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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 of a heat engine using work out
m(v^2)/qvB
(V^2)/R
(Wnet)/(Qin)
F/A

2. the units of power other than watts
(EMF)Rt/10
joules/second
KI/r
frequency never changes for light problems

3. formula for finding the magnetic field a distance r from a current carrying wire
(I^2)R
KI/r
(Patm) + (Pgauge)
constant pressure

4. forgotten power equation
2nt=mwavelength
FV
roegh
dSintheta=mwavelength

5. formula used to find the heat generated by a resistor after a certain amount of time if the current through the resistor is known
qVB
V+IR
(I^2)RT
(1/Do) + (1/Di) = (1/f)

6. the force on a charge moving parallel to a magnetic field
Joules/Columb
J= Ft
h(Fo)
no force (right hand rule)

7. formula for finding magnetic flux
k|Q|/r^2
elastic collision
BA
n(Cv)(deltaT)

8. formula for the wavelength (debroglie wavelength) of a moving particle
Columbs/second
h/mv
Ed=V
AV=(A2)(V2)

9. resistance of a wire
qE
elastic collision
pL/A
(V^2)/R

10. equation for the first law of thermodynamics
qV
deltaU = deltaQ + deltaW
opposite motion
GM*M/(r^2)

11. velocity of waves on a string if tension is known
(N2)/(N1)
sqrt(T/(m/))
0
hc/wavelength

12. electric potential a distance r from a charge
constant volume
(Patm) + (Pgauge)
GM*M/(r^2)
KQ/r

13. the units of current other than amps
((Th) -(Tl))/(Th)
Columbs/second
GM*M/(r^2)
rF

14. formula relating voltage and electric field
net work = delta K
BLv
GM*M/(r^2)
Ed=V

15. formula for period of a pendulum
constant volume
2Pi * sqrt(l/g)
no force (right hand rule)
KQ/r

16. heat required to melt a substance
(No)(wavelength)=(Nn)(new wavelength)
elastic collision
M(Lf)
1/((1/C)+(1/C)..........)

17. energy of a photon if wavelength is known
hc/wavelength
(1/Do) + (1/Di) = (1/f)
J= Ft
(N2)/(N1)

18. formula for change in internal energy in a cosnstat volume PV process
(3/2)nRdeltaT
Columbs/second
2Pi * sqrt(l/g)
inelastic collision

19. formula for constructive interference in a thin membrane with two phase changes
2nt=mwavelength
K |q||Q|/r^2
.5mV^2 + .5KA^2
(Fn)(mu)

20. second kinematic
k|Q|/r^2
L -LCostheta
delta x = (Vo)t + .5at^2
sqrt(3KT/m)

21. type of collision where K is conserved
V+IR
elastic collision
Ed=V
(N2)/(N1)

22. hooke's law force of a spring
-KA
MC(deltaT)
h(Fo)
V^2=(Vo)^2 +2a*change in x

23. formula equating energy and mass
e=mc^2
J= Ft
AV=(A2)(V2)
Q=CV

24. new frequency of light as it enters a new substance
roeVg
k|Q|/r^2
2Pi * sqrt(l/g)
frequency never changes for light problems

25. formula for critical angle
net work = delta K
(N2)/(N1)
(V^2)/r
sqrt(T/(m/))

26. focal length of a mirror with radius d
inelastic collision
d/2
constant volume
V+IR

27. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
M(Lf)
G M/((d/2)^2)
delta x = (Vo)t + .5at^2
V^2=(Vo)^2 +2a*change in x

28. energy stored in a capacitor
.5CV^2 or .5 Q^2/C or .5QV
VI
Joules/Columb
qE

29. lens/mirror equation
(1/Do) + (1/Di) = (1/f)
inelastic collision
h/wavelength
qVB

30. formula for torque
deltaU = deltaQ + deltaW
sqrt(3KT/m)
rF
h(Fo)

31. new wavelength of light as it enters a new substance
sqrt(T/(m/))
(No)(wavelength)=(Nn)(new wavelength)
J= Ft
delta x = (Vo)t + .5at^2

32. formula for power with current and voltage
(Wnet)/(Qin)
Columbs/second
VI
(I^2)RT

33. units for voltage other than volts
2Pi * sqrt(l/g)
Joules/Columb
(No)(wavelength)=(Nn)(new wavelength)
(Patm) + (Pgauge)

34. formula for efficiency not using work out
((Qin) -(Qout))/(Qin)
qrB/m
nSintheta=nsintheta
(1/Do) + (1/Di) = (1/f)

35. isothermal
no temp change
constant pressure
qrB/m
2Pi * sqrt(l/g)

36. formula for finding the work function of a metal if the cutoff frequency is known
mV -m(Vo)
G M/((d/2)^2)
(EMF)Rt/10
h(Fo)

37. force of friction
(Fn)(mu)
(3/2)nRdeltaT
L -LCostheta
V^2=(Vo)^2 +2a*change in x

38. formula for finding the stopping potential of a metal for a wavelength if the cutoff frequency is known
.5KA^2
k|Q|/r^2
opposite motion
(hc/wavelength)=h(Fo) +(Vs)

39. adibatic
GM*M/(r^2)
no heat flow
(I^2)RT
(hc/wavelength)=h(Fo) +(Vs)

40. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
perfectly inelastic collision
E/B
2Pi * sqrt(l/g)
qrB/m

41. force of frction on an incline
mgCostheta(mu)d
(I^2)RT
GM*M/(r^2)
sqrt(T/(m/))

42. formula for power with Voltage and resistance
(V^2)/R
((Qin) -(Qout))/(Qin)
qE
KI/r

43. formula for constructive interference in a diffraction grating
((Qin) -(Qout))/(Qin)
Q=CV
inelastic collision
dSintheta=mwavelength

44. formula for height of the block (at the start of a pendulum string) in terms of theta and L
1/4wavelength
Ed=V
elastic collision
L -LCostheta

45. change in internal energy during a cyclic process
net work = delta K
0
2nt=mwavelength
no heat flow

46. formula for energy of a spring mass when spring is neither at maximum displacement nor at equilibrium
rF
0
.5mV^2 + .5KA^2
opposite motion

47. formula for finding the energy required to move a charged particle from infinity to a point a certain distance away from a charged particle
sqrt(3KT/m)
qV
deltaU = deltaQ + deltaW
net work = delta K

48. third kinematic
V^2=(Vo)^2 +2a*change in x
(Wnet)/(Qin)
2nt=mwavelength
.5CV^2 or .5 Q^2/C or .5QV

49. magnification equation
nSintheta=nsintheta
qE
((Qin) -(Qout))/(Qin)
(Di)/(Do) or (Hi)/(Ho)

50. heat required to change temperature of a substance
roegh
sqrt(3KT/m)
(Wnet)/(Qin)
MC(deltaT)