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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. P + pgy + ½pv² = const.
Fy=FnCos?-Fg
P=F/A=rho(g)h
Bernoulli Principal
?L=(coefficient of linear expansion)aLinitial?T

2. natural frequencies in a closed tube
L=n/4? has to be odd numbers
PE=mgh
?U=Q + W - heat added= heat + work
P=Patm + rho g h

3. v = v0 + at
Force of Spring
Kinematic with Velocity - Acceleration - and Time
Gravitational Potential Energy Anywhere
273K and 1.013E5 pa

4. Simple harmonic motion - pendulum
Adiabatic and isothermal processes ec= TH-TL/
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Force of Spring
T=2pvl/g

5. vrms (2 equations)
Kinetic Energy
J=?vm=F?t
n1sin?1=n2sin90
v3kT/m [mass per molecule] - v3RT/M [molar mass]

6. Force buoyancy (2 formulas)
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
Period in General
Fb=mf g= rhof Vf g
Fgx=FgCos?

7. F(gravity) = -(Gm1m2/r²)
T=2pvl/g
Kinematic with Velocity - Acceleration - and Time
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
Force of Gravity

8. x = x0 + v0t + ½at²
Kinematic with Displacement - Velocity - Acceleration - and Time
Efficiency of a Heat Engine
V=added - Q=constant - C= 1/C
Pin=Pout=Fin/Ain=Fout/Aout

9. Net work
Ideal Gas Law
W=KEf-KEi
rho=m/v
Force of Gravity

10. Kinetic energy
?U=W - no heat added system (Q=0)
KE=1/2mv²
V=?f
C=KepA/d

11. Force on a current carrying wire in a magnetic field
P=IV
F=BIL
Ideal Gas Law
Ft=0

12. Period for circular motion
Fnx=FnSin?
P=Patm + rho g h
T=2pr/v
F=Gm1m2/r²

13. W
Average Speed of each Molecule
Average Molecular Kinetic Energy
J=?vm=F?t
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion

14. T = 1/f
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
L=n/4? has to be odd numbers
Period in General
Kinematic with Velocity - Acceleration - and Time

15. Electron volts
V=added - Q=constant - C= 1/C
W=KEf-KEi
1ev=1.6E-19J
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force

16. Natural frequency open tube/not in a tub
Fx=mv²/r=FnSin?
L=n/2?
Centripetal Acceleration
PE=mgh

17. Resistivity in a wire
R=rho L/A A=cross sectional area
Vab=Rated voltage-IR (r=internal resistance)
Q=CV
q=K?AT/L

18. Voltmeter
F=Bvsin?q
Ft=0
Fgx=FgCos?
added in parallel - measures volts - high resistance

19. Momentum
P=mv (Kg m/s) or (N s)
?v=0 - w=0 area under the curve is zero
Force of Spring
Archimedes Principle/Bouyancy

20. r in torque
moment arm - perpendicular distance from the force to the axis of rotation
T=2pvl/g
T=2pvm/k
F=BIL

21. Magnitude of gravitational forces between objects
a=v²/r
Period in General
in series - measures current - low resistance
F=Gm1m2/r²

22. F(spring) = -kx
Ug= Gm1m2/r
Force of Spring
C=KepA/d
QH=QL +W and e=W/QH

23. v² = v0² + 2a(x-x0)
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
PE=mgh
Kinematic with Velocity - Acceleration - and Displacement
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field

24. PE of a spring
PE=1/2kx²
C=KepA/d
n1sin?1=n2sin?2
Centripetal Acceleration

25. Standard pressure and temperature and pressure
W=KEf-KEi
V=Ed
273K and 1.013E5 pa
W=Fd=mad - direction of force must be same as direction of distance

26. Impulse
?v=0 - w=0 area under the curve is zero
J=?vm=F?t
Thermal Conductivity
Temperature is constant - ?U=0 - -Q=W

27. Bernoulli's Equation [Conservation of energy]
V=added - Q=constant - C= 1/C
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
q=K?AT/L
Fy=FnCos?-Fg

28. Isothermal process
counterclockwise
Force of Spring
n1sin?1=n2sin?2
Temperature is constant - ?U=0 - -Q=W

29. Dialectrics insulating sheet between plates
Power from Force
C=KepA/d
P=Patm + rho g h
Adiabatic and isothermal processes ec= TH-TL/

30. Voltage-charges formula (2)
Average Molecular Kinetic Energy
V=W/Q=KQ/r NO VECTORS
?L=(coefficient of linear expansion)aLinitial?T
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal

31. Energy of gravitational attraction
1/2QV=U
Adiabatic and isothermal processes ec= TH-TL/
Ug= Gm1m2/r
P=IV

32. 2nd right hand rule
P=IV
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Average Molecular Kinetic Energy
F=Bvsin?q

33. On a banked curve in circular motion - Fn in the x is
q=K?AT/L
Fy=FnCos?-Fg
Fnx=FnSin?
a=v²/r

34. torque
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
Kinematic with Displacement - Velocity - Acceleration - and Time
t=Fr - force must be perpendicular to the moment arm and the axis of rotation

35. Potential energy
E=-N Change in flux/?t=Blv (v=velocity of the wire)
L=n/2?
PE=mgh
billiard balls - no sticking total energy is conserved

36. H = (kA?T)/L
Thermal Conductivity
v3kT/m [mass per molecule] - v3RT/M [molar mass]
Kinematic with Velocity - Acceleration - and Displacement
T=2pvl/g

37. e = (T(hot) - T(cold))/T(hot)
W=KEf-KEi
Efficiency of an Ideal Engine
F=Bvsin?q
Kinematic with Velocity - Acceleration - and Time

38. Negative torque
P=IV
Ideal Gas Law
px and py are conserved
clockwise

39. Kirchhoffs loop rule [conservation of energy]
T=2pvl/g
V=Ed
General Pressure
sum of voltages must be zero

40. heat flow through a window or door
q=K?AT/L
Power from Energy
Ft=0
V=constant - Q=added - C=added

41. On an inclined plane - gravity in the y
T=2pvm/k
Fgy=FgSin?
Spring Potential Energy
Kavg=(3/2)kbT

42. P = F/A
W=KEf-KEi
T=2pvm/k
General Pressure
on a solenoid wrap finger around direction of current - thumb will point in north pole direction

43. Centripetal acceleration
P=Patm + rho g h
Fy=FnCos?-Fg
a=v²/r
Kinematic with Velocity - Acceleration - and Time

44. Electric field intensity
Adiabatic and isothermal processes ec= TH-TL/
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
PE=1/2kx²

45. Current
I=?q/?t
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
T=2pvl/g
v3kT/m [mass per molecule] - v3RT/M [molar mass]

46. P = Fvcos?
V=?f
Power from Force
f=mv²/r
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force

47. Capacitors in parallel
V=constant - Q=added - C=added
P=F/A=rho(g)h
V=added - Q=constant - C= 1/C
Centripetal Acceleration

48. K = ½mv²
Kinetic Energy
Fb=mf g= rhof Vf g
T=2pvl/g
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal

49. Capacitors in series
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
I=?q/?t
V=added - Q=constant - C= 1/C

50. U(gravitational) = -(Gm1m2/r)
Gravitational Potential Energy Anywhere
Ug= Gm1m2/r
Centripetal Acceleration
F=kQ1Q2/r² BREAK INTO VECTORS