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AP Physics B: 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. Period for a spring in simple harmonic motion
Adiabatic and isothermal processes ec= TH-TL/
Fb=mf g= rhof Vf g
Force of Spring
T=2pvm/k

2. Period for circular motion
?L=(coefficient of linear expansion)aLinitial?T
Bernoulli Principal
Power from Energy
T=2pr/v

3. 2nd right hand rule
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
General Pressure
T=2pvl/g
W=KEf-KEi

4. Change in pressure
Power from Force
V=Ed
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
?P=rho(g)?h

5. Carnot engine
billiard balls - no sticking total energy is conserved
Fny=FnCos?
Adiabatic and isothermal processes ec= TH-TL/
rho=m/v

6. Magnitude of gravitational forces between objects
F=Gm1m2/r²
Fnet=Fb-Fg
V=vFt/(m/l)
Constructive: 2t=m?+1/2? - Destructive: 2t=m?

7. Net work
W=KEf-KEi
P=mv (Kg m/s) or (N s)
T=2pvm/k
V=added - Q=constant - C= 1/C

8. P = Fvcos?
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
Power from Energy
billiard balls - no sticking total energy is conserved
Power from Force

9. P(avg) = W/?t
Power from Energy
Kinematic with Velocity - Acceleration - and Displacement
Force of Friction
T=2pvl/g

10. heat flow through a window or door
F=kQ1Q2/r² BREAK INTO VECTORS
q=K?AT/L
Thermal Conductivity
T=2pvl/g

11. Natural frequency open tube/not in a tub
Continuity
Ideal Gas Law
L=n/2?
V=added - I=constant - R= added

12. torque
?P=rho(g)?h
L=n/2?
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
1ev=1.6E-19J

13. F(friction) = µN
Fb=mf g= rhof Vf g
Force of Friction
L=n/2?
Fy=FnCos?-Fg

14. natural frequencies in a closed tube
n1sin?1=n2sin?2
Continuity
L=n/4? has to be odd numbers
Period in General

15. Velocity of a wave
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
V=?f
Fnet=Fb-Fg
Fx=mv²/r=FnSin?

16. Total internal reflection
n1sin?1=n2sin90
Fx=mv²/r=FnSin?
QH=QL +W and e=W/QH
F=kQ1Q2/r² BREAK INTO VECTORS

17. Voltage-parallel plates
Kavg=(3/2)kbT
Fgy=FgSin?
1/2QV=U
V=Ed

18. Flux
Work
Flux (in webers)=Bcos?A
n1sin?1=n2sin?2
P=mv (Kg m/s) or (N s)

19. e = (T(hot) - T(cold))/T(hot)
F=BIL
Q=CV
P=mv (Kg m/s) or (N s)
Efficiency of an Ideal Engine

20. Dialectrics insulating sheet between plates
SG=rho object/10³
Sum of all currents (I) entering=sum of all currents (I) leaving
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
C=KepA/d

21. Capacitors in parallel
F=Gm1m2/r²
V=constant - Q=added - C=added
Fnet=Fb-Fg
T=2pvl/g

22. Centripetal force
Kinematic with Displacement - Velocity - Acceleration - and Time
V=constant - I=added - R=1/r added
f=mv²/r
Pressure from Depth

23. Simple force equation
Kinematic with Velocity - Acceleration - and Displacement
L=n/2?
T=2pvm/k
F=ma

24. x = x0 + v0t + ½at²
T=2pvl/g
General Pressure
Kinematic with Displacement - Velocity - Acceleration - and Time
Flux (in webers)=Bcos?A

25. Power - simple formula (mechanics)
T=2pvl/g
P=W/T=FD/T=FV
V=Ed
Fy=FnCos?-Fg

26. r in torque
V=IR
moment arm - perpendicular distance from the force to the axis of rotation
Temperature is constant - ?U=0 - -Q=W
v3kT/m [mass per molecule] - v3RT/M [molar mass]

27. Ideal gas laws
?L=(coefficient of linear expansion)aLinitial?T
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
?P=rho(g)?h
F=Gm1m2/r²

28. W
Kavg=(3/2)kbT
Ideal Gas Law
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
?P=rho(g)?h

29. Specific gravity
Average Speed of each Molecule
Efficiency of a Heat Engine
F=Gm1m2/r²
SG=rho object/10³

30. Electric field intensity
F=BIL
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh

31. v = v(3RT)/M = v(3KT)/µ
Sum of all currents (I) entering=sum of all currents (I) leaving
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
Average Speed of each Molecule

32. Basic thermo equation
Efficiency of an Ideal Engine
Ug= Gm1m2/r
f=mv²/r
?U=Q + W - heat added= heat + work

33. Force buoyancy (2 formulas)
F=kx
Fb=mf g= rhof Vf g
Fgx=FgCos?
L=n/2?

34. Impulse
J=?vm=F?t
Kinematic with Displacement - Velocity - Acceleration - and Time
A1V1=A2V2
Temperature is constant - ?U=0 - -Q=W

35. Isovolumetric/isochoric
?v=0 - w=0 area under the curve is zero
QH=QL +W and e=W/QH
Power from Force
W=KEf-KEi

36. Net force/apparent weight in forces
F=kQ1Q2/r² BREAK INTO VECTORS
Fnet=Fb-Fg
F=BIL
Fx=mv²/r=FnSin?

37. Couloms law (force between two charged objects)
General Pressure
Ideal Gas Law
F=kQ1Q2/r² BREAK INTO VECTORS
Momentum

38. K = (3/2)kT
Average Molecular Kinetic Energy
Ideal Gas Law
Fny=FnCos?
Momentum

39. snells law
Pressure is constant ?P=0 w=-P?V
Average Molecular Kinetic Energy
n1sin?1=n2sin?2
J=?vm=F?t

40. vrms (2 equations)
Bernoulli Principal
rho=m/v
Gravitational Potential Energy Anywhere
v3kT/m [mass per molecule] - v3RT/M [molar mass]

41. Adiabatic process
billiard balls - no sticking total energy is conserved
Adiabatic and isothermal processes ec= TH-TL/
v3kT/m [mass per molecule] - v3RT/M [molar mass]
?U=W - no heat added system (Q=0)

42. v² = v0² + 2a(x-x0)
PE=mgh
Kinematic with Velocity - Acceleration - and Displacement
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion

43. Velocity of sound in a strong
L=n/4? has to be odd numbers
W=Fd=mad - direction of force must be same as direction of distance
V=vFt/(m/l)
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal

44. p = mv
Momentum
sum of voltages must be zero
F=Bvsin?q
Adiabatic and isothermal processes ec= TH-TL/

45. Work - simple formula
Kinematic with Displacement - Velocity - Acceleration - and Time
W=Fd=mad - direction of force must be same as direction of distance
F=kQ1Q2/r² BREAK INTO VECTORS
Fny=FnCos?

46. Voltage-charges formula (2)
Power from Force
Vab=Rated voltage-IR (r=internal resistance)
Temperature is constant - ?U=0 - -Q=W
V=W/Q=KQ/r NO VECTORS

47. e = abs(W/Q)
Bernoulli Principal
Efficiency of a Heat Engine
?U=W - no heat added system (Q=0)
V=vFt/(m/l)

48. PV = nRT = NkT
Ideal Gas Law
V=constant - Q=added - C=added
F=Gm1m2/r²
Force of Spring

49. Critical speed is
Efficiency of a Heat Engine
Power from Energy
Ft=0
T=2pvl/g

50. Energy in a capacitor
V=Ed
px and py are conserved
1/2QV=U
General Pressure