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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. Isovolumetric/isochoric
L=n/2?
?v=0 - w=0 area under the curve is zero
Pin=Pout=Fin/Ain=Fout/Aout
T=2pvm/k

2. Elastic collision
Pin=Pout=Fin/Ain=Fout/Aout
Fy=FnCos?-Fg
billiard balls - no sticking total energy is conserved
?v=0 - w=0 area under the curve is zero

3. Net force/apparent weight broken done
Gravitational Potential Energy Anywhere
Pressure is constant ?P=0 w=-P?V
273K and 1.013E5 pa
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal

4. Velocity of sound in a strong
q=K?AT/L
Kinematic with Velocity - Acceleration - and Time
F=Gm1m2/r²
V=vFt/(m/l)

5. F(gravity) = -(Gm1m2/r²)
Force of Gravity
T=2pvm/k
Efficiency of a Heat Engine
P=W/T=FD/T=FV

6. r in torque
V=added - I=constant - R= added
?U=Q + W - heat added= heat + work
moment arm - perpendicular distance from the force to the axis of rotation
Force of Spring

7. Electric field intensity
SG=rho object/10³
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
V=added - I=constant - R= added
Power from Energy

8. F-NF or vice versa
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Fy=FnCos?-Fg
V=added - I=constant - R= added
Q=CV

9. Dialectrics insulating sheet between plates
I=?q/?t
Spring Potential Energy
C=KepA/d
A1V1=A2V2

10. a(centripetal) = v²/r
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
Thermal Conductivity
Centripetal Acceleration
R=rho L/A A=cross sectional area

11. Simple harmonic motion - pendulum
R=rho L/A A=cross sectional area
J=?vm=F?t
F=kQ1Q2/r² BREAK INTO VECTORS
T=2pvl/g

12. Voltage-charges formula (2)
V=W/Q=KQ/r NO VECTORS
P=Patm + rho g h
T=2pvl/g
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion

13. PV = nRT = NkT
P=W/T=FD/T=FV
Fnx=FnSin?
V=?f
Ideal Gas Law

14. The three kinematics equations
F=ma
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
?L=(coefficient of linear expansion)aLinitial?T
F=Bvsin?q

15. Capacitors in series
V=added - Q=constant - C= 1/C
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
Adiabatic and isothermal processes ec= TH-TL/
Constructive: 2t=m?+1/2? - Destructive: 2t=m?

16. F(spring) = -kx
Sum of all currents (I) entering=sum of all currents (I) leaving
Force of Spring
V=W/Q=KQ/r NO VECTORS
F=kx

17. W = F?rcos?
Ideal Gas Law
Work
Sum of all currents (I) entering=sum of all currents (I) leaving
Fnx=FnSin?

18. Positive torque
counterclockwise
?v=0 - w=0 area under the curve is zero
F=kQ1Q2/r² BREAK INTO VECTORS
J=?vm=F?t

19. v² = v0² + 2a(x-x0)
Kinematic with Velocity - Acceleration - and Displacement
v3kT/m [mass per molecule] - v3RT/M [molar mass]
PE=1/2kx²
I=?q/?t

20. P = P0 + pgh
Fy=FnCos?-Fg
Fnx=FnSin?
T=2pvm/k
Pressure from Depth

21. Period for a spring in simple harmonic motion
F=kx
Ideal Gas Law
moment arm - perpendicular distance from the force to the axis of rotation
T=2pvm/k

22. Simple harmonic motion - spring
T=2pvm/k
P=mv (Kg m/s) or (N s)
Work
V=vFt/(m/l)

23. Electron volts
1ev=1.6E-19J
?U=W - no heat added system (Q=0)
V=W/Q=KQ/r NO VECTORS
Continuity

24. Continuity equation [Conservation of mass]
A1V1=A2V2
1/2QV=U
V=added - I=constant - R= added
v3kT/m [mass per molecule] - v3RT/M [molar mass]

25. Vectors in momentum
px and py are conserved
Force of Friction
Kavg=(3/2)kbT
Pressure from Depth

26. A1V1 = A2V2
Kavg=(3/2)kbT
rho=m/v
Continuity
Fy=FnCos?-Fg

27. Pascals principle
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
Pin=Pout=Fin/Ain=Fout/Aout
in series - measures current - low resistance
L=n/2?

28. 2nd right hand rule
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Momentum
PE=1/2kx²

29. Parallel Circuits
Fnx=FnSin?
Centripetal Acceleration
Momentum
V=constant - I=added - R=1/r added

30. Voltage (circuts)
counterclockwise
C=KepA/d
Continuity
V=IR

31. Period for a pendulum in simple harmonic motion
Fny=FnCos?
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
QH=QL +W and e=W/QH
T=2pvl/g

32. Force buoyancy (2 formulas)
V=W/Q=KQ/r NO VECTORS
Adiabatic and isothermal processes ec= TH-TL/
Fb=mf g= rhof Vf g
sum of voltages must be zero

33. Potential energy
PE=mgh
f=mv²/r
R=rho L/A A=cross sectional area
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS

34. Change in pressure
?P=rho(g)?h
R=rho L/A A=cross sectional area
L=n/4? has to be odd numbers
Fnet=Fb-Fg

35. Standard pressure and temperature and pressure
273K and 1.013E5 pa
F=Bvsin?q
q=K?AT/L
moment arm - perpendicular distance from the force to the axis of rotation

36. Specific gravity
a=v²/r
SG=rho object/10³
Q=CV
Fny=FnCos?

37. W
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
Period in General
Bernoulli Principal
W=Fd=mad - direction of force must be same as direction of distance

38. Resistivity in a wire
R=rho L/A A=cross sectional area
P=W/T=FD/T=FV
Adiabatic and isothermal processes ec= TH-TL/
added in parallel - measures volts - high resistance

39. Adiabatic process
T=2pvl/g
n1sin?1=n2sin90
Efficiency of an Ideal Engine
?U=W - no heat added system (Q=0)

40. Voltage across a battery terminal
Vab=Rated voltage-IR (r=internal resistance)
Momentum
Force of Gravity
1ev=1.6E-19J

41. P = F/A
General Pressure
P=F/A=rho(g)h
Kavg=(3/2)kbT
clockwise

42. Voltage-parallel plates
V=Ed
Period in General
Q=CV
Pressure is constant ?P=0 w=-P?V

43. Engines (2 equations)
F=kx
QH=QL +W and e=W/QH
Power from Force
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS

44. K = ½mv²
Kinetic Energy
Pressure from Depth
J=?vm=F?t
?v=0 - w=0 area under the curve is zero

45. F(buoy) = pVg
Bernoulli Principal
Archimedes Principle/Bouyancy
Flux (in webers)=Bcos?A
J=?vm=F?t

46. Impulse
J=?vm=F?t
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal

47. Net force/apparent weight in forces
R=rho L/A A=cross sectional area
Fnet=Fb-Fg
L=n/2?
moment arm - perpendicular distance from the force to the axis of rotation

48. Ammeter
in series - measures current - low resistance
?U=W - no heat added system (Q=0)
Vab=Rated voltage-IR (r=internal resistance)
L=n/4? has to be odd numbers

49. PE of a spring
PE=1/2kx²
L=n/4? has to be odd numbers
T=2pvl/g
Constructive: 2t=m? - Destructive: 2t=m?+1/2?

50. Critical speed is
Average Molecular Kinetic Energy
Ug= Gm1m2/r
E=-N Change in flux/?t=Blv (v=velocity of the wire)
Ft=0