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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. velocity of an electrion as it exitws from the hole
roeVg
Ed=V
qrB/m
sqrt(3KT/m)

2. formula for constructive interference in a diffraction grating
joules/second
2nt=mwavelength
dSintheta=mwavelength
no force (right hand rule)

3. new wavelength of light as it enters a new substance
.5CV^2 or .5 Q^2/C or .5QV
K |q||Q|/r^2
(No)(wavelength)=(Nn)(new wavelength)
sqrt(3KT/m)

4. magnification equation
Joules/Columb
sqrt(3KT/m)
(Di)/(Do) or (Hi)/(Ho)
KQ/r

5. electric potential a distance r from a charge
.5mV^2 + .5KA^2
KQ/r
n(Cv)(deltaT)
constant volume

6. work energy theorum
K |q||Q|/r^2
AV=(A2)(V2)
qV
net work = delta K

7. formula for torque
.5mV^2 + .5KA^2
rF
-KA
(Patm) + (Pgauge)

8. formula for finding the magnetic field a distance r from a current carrying wire
.5CV^2 or .5 Q^2/C or .5QV
((Qin) -(Qout))/(Qin)
KI/r
M(Lf)

9. heat during an isometric process
constant pressure
.5KA^2
n(Cv)(deltaT)
GM*M/(r^2)

10. voltage induced in a rod moving through a uniform magnetic field
J= Ft
BLv
pL/A
AV=(A2)(V2)

11. formula for energy of a spring mass when spring is at maximum displacement
frequency never changes for light problems
hc/wavelength
.5KA^2
pL/A

12. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
elastic collision
G M/((d/2)^2)
roeVg
constant volume

13. formula for finding magnetic flux
BA
h(Fo)
elastic collision
(V^2)/r

14. energy of a photon if wavelength is known
Joules/Columb
(EMF)Rt/10
hc/wavelength
MC(deltaT)

15. focal length of a mirror with radius d
d/2
mgCostheta(mu)d
E/B
nSintheta=nsintheta

16. force of frction on an incline
mgCostheta(mu)d
d/2
(No)(wavelength)=(Nn)(new wavelength)
Columbs/second

17. formula for energy of a spring mass when spring is neither at maximum displacement nor at equilibrium
.5mV^2 + .5KA^2
(V^2)/R
2nt=mwavelength
2Pi * sqrt(l/g)

18. forgotten power equation
1/4wavelength
sqrt(3KT/m)
FV
K |q||Q|/r^2

19. what direction is friction?
(EMF)Rt/10
J= Ft
opposite motion
G M/((d/2)^2)

20. snells law
mV -m(Vo)
m(v^2)/qvB
pL/A
nSintheta=nsintheta

21. formula for current through the resistor when the ten coils are removed from the B field in an amount of time t
(Patm) + (Pgauge)
roegh
(EMF)Rt/10
2nt=mwavelength

22. equation for the first law of thermodynamics
deltaU = deltaQ + deltaW
(1/Do) + (1/Di) = (1/f)
rF
mV -m(Vo)

23. third kinematic
J= Ft
opposite motion
elastic collision
V^2=(Vo)^2 +2a*change in x

24. the force on a charge in an electric field
VI
qE
h(Fo)
no force (right hand rule)

25. formula for height of the block (at the start of a pendulum string) in terms of theta and L
perfectly inelastic collision
h(Fo)
L -LCostheta
(3/2)nRdeltaT

26. formula to find the absoluate pressure at the bottom of a pool
(Patm) + (Pgauge)
V = (Vo) + at
h/mv
(I^2)R

27. formula for power with Voltage and resistance
mgCostheta(mu)d
(V^2)/R
FV
pL/A

28. the units of power other than watts
G M/((d/2)^2)
L -LCostheta
joules/second
E/B

29. formula to find the gauge pressure at the bottom of a pool
(N2)/(N1)
inelastic collision
roegh
qVB

30. isothermal
opposite motion
perfectly inelastic collision
n(Cv)(deltaT)
no temp change

31. formula for impulse involving momentum
((Qin) -(Qout))/(Qin)
mV -m(Vo)
(V^2)/R
h/wavelength

32. type of collision where K is conserved
qrB/m
elastic collision
G M/((d/2)^2)
BLv

33. isobaric
constant pressure
(I^2)RT
V^2=(Vo)^2 +2a*change in x
frequency never changes for light problems

34. formula for finding the momentum of a photon
BA
Joules/Columb
constant pressure
h/wavelength

35. force of friction
1/2wavelength
(Fn)(mu)
((Th) -(Tl))/(Th)
G M/((d/2)^2)

36. formula equating energy and mass
n(Cv)(deltaT)
V = (Vo) + at
e=mc^2
KQ/r

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
qE
0
(I^2)RT
MC(deltaT)

38. heat during a cyclic process (net heat)
deltaU -deltaW
dSintheta=mwavelength
h(Fo)
(I^2)RT

39. the units of current other than amps
k|Q|/r^2
Columbs/second
qrB/m
(I^2)R

40. force a charge in a Bfield
BA
e=mc^2
(hc/wavelength)=h(Fo) +(Vs)
qVB

41. formula for efficiency not using work out
hc/wavelength
mgCostheta(mu)d
((Qin) -(Qout))/(Qin)
constant volume

42. formula relating voltage and electric field
V^2=(Vo)^2 +2a*change in x
KI/r
Ed=V
hc/wavelength

43. the force on a charge moving parallel to a magnetic field
(EMF)Rt/10
J= Ft
no force (right hand rule)
0

44. formula for impluse involving time
V^2=(Vo)^2 +2a*change in x
elastic collision
sqrt(3KT/m)
J= Ft

45. change in internal energy during a cyclic process
deltaU = deltaQ + deltaW
(V^2)/R
2nt=mwavelength
0

46. adibatic
1/((1/C)+(1/C)..........)
no heat flow
(1/Do) + (1/Di) = (1/f)
F/A

47. force of gravity between two objects of mass m
V+IR
(V^2)/R
(Patm) + (Pgauge)
GM*M/(r^2)

48. natural frequency of an open tube of length L
MC(deltaT)
roegh
1/2wavelength
perfectly inelastic collision

49. equation of continuity
joules/second
(V^2)/R
AV=(A2)(V2)
(N2)/(N1)

50. the electric force between two objects of charge Q
K |q||Q|/r^2
qVB
(hc/wavelength)=h(Fo) +(Vs)
(N2)/(N1)