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SAT Subject Test: 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 electric potential energy?
?p=f?t (where f is AVERAGE force and t is how long force is applied)
E=hf (= Planck's constant*frequency)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V

2. Ideal gas law
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
M= -di/do (=-hi/ho)
(n-1/2)?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)
I=mr²

3. Electric force formula? (two)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Felec=qE=[kq1q2]/r²
The volume of the object.

4. Newton's third law
For every action there is an equal and opposite reaction
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)

5. ONE END CAPPED PIPE FREQUENCY (Frequency/Harmonic series of a pipe closed at one ned)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Product of each lens's magnification
F=GM1M2/r²
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)

6. Magnetic force formula (for particle)?
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Voltage=PE/q (remember Joules/Coulomb= volt)
Vfinal²=V0²+ 2ad
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)

7. Formula for energy levels within any atom?

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8. Graviational force formula
Y= 1/ v(1-(v/c)²)
4.14 10?¹5 eVs
F=GM1M2/r²
PE=mgh

9. Moment of Inertia (a.k.a. rotational mass)
Q=mc?T (where T is temperature)
Felec=qE=[kq1q2]/r²
E= kq/r² (= f/q)
I=mr²

10. Sign of focus for concave lens?
Low
Positive - focus in front of the lens (=real image)
931MeV=1amu
E= kq/r² (= f/q)

11. High frequency wave shave...
Shorter ? - less diffraction - bigger shadow.
F=mv²/ r
Longer ? - larger diffraction - smaller shadow.
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)

12. Faraday's law
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
The incident angle at which total internal reflection occurs (use ?r=90°)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
(n-1/2)?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)

13. Threshold frequency formula?

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14. Relativistic factor Y formula
Y= 1/ v(1-(v/c)²)
Product of each lens's magnification
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Vfinal= V0 +at

15. Magnetic force formula (for wire)?
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
V= 331 m/s + (.6 m/s°C)Temperature
Momentum is always conserved in the absence of an outside force
F=ILBsin? (?= angle btw. L and B)

16. If you drop an object into water the volume displaced equals...
V=f?
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
The volume of the object.
W=qVoltage. (think C* J/C and C's cancel out)

17. Electron capture
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Difference between mass of nucleus and sum of it's constituent nucleons (protons/neutrons ...WHY?) energy lost when atom created. (That energy lost is the same energy it takes to break a nucleus into separate protons and neutrons)
(n-1/2)?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)

18. Heat formula
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Q=mc?T (where T is temperature)
Positive - focus in front of the lens (=real image)
E=hf (= Planck's constant*frequency)

19. Formula for diffraction pattern - Anti-node to Anti-node (A-A)
N?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)
M= -di/do (=-hi/ho)
4.14 10?¹5 eVs
Q=mc?T (where T is temperature)

20. Right-hand rule
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
F=ILBsin? (?= angle btw. L and B)

21. Conservation of momentum
Fb= mass of displaced fluid * gravity
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Y= 1/ v(1-(v/c)²)
Momentum is always conserved in the absence of an outside force

22. Power formula?
C= 3*108 m/s
N= C/velocity.
Intensity a Amplitude/ d²
P=IV=I²R=V² /R = Fd/t= Force*velocity

23. (Full/Final) Velocity formula
Vfinal= V0 +at
Positive - focus in front of the lens (=real image)
K= 9 * 10? Nm²/C²
Intensity a Amplitude/ d²

24. Capacitance constant
E0= 8.85 * 10?¹² C²/(Nm²)
Fnet=ma
Q=m*L (where L is the latent heat of fusion or vaporization)
?Tstationary= Y (?Tmoving)

25. Work function F is..?
?IE= - W (work)
?= 4L + 1.6d
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)

26. Total KE formula
Momentum is always conserved in the absence of an outside force
931MeV=1amu
Etotal= E rest + KE= mc² + (Y-1)mc²
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V

27. Velocity formula if time not given
For every action there is an equal and opposite reaction
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Vfinal²=V0²+ 2ad
Momentum is always conserved in the absence of an outside force

28. Sign of focus for convex lens?
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Negative - focus behind the lens (= virtual image)
KE= (Y-1)mc² (= (Y-1)E)
K= 9 * 10? Nm²/C²

29. Law of reflection
1/f= 1/di + 1/do
Felec=qE=[kq1q2]/r²
Angle of incidence=Angle of reflection
Low

30. Thin lens equation
E0= 8.85 * 10?¹² C²/(Nm²)
1/f= 1/di + 1/do
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Vstationary obj.= [u+v] / [1 + uv/c²] (where u is velocity of large object - and v is velocity of "thrown" object relative to large object)

31. Relativistic formula for (kinetic) energy
PE=mgh
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
KE= (Y-1)mc² (= (Y-1)E)
Fnet=ma

32. Formula for diffraction pattern - Anti-node to node (A-N)
E= kq/r² (= f/q)
(n-1/2)?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Low

33. Formula for velocity of waves?
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
Ni sin?i=nrsin?r
V=f?
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)

34. energy in a reaction q formula?
Distance= velocity * time
Beat frequency= |F1-F2|
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Large/high

35. Distance formula?
Positive - focus in front of the lens (=real image)
Distance= velocity * time
N?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)
K= 9 * 10? Nm²/C²

36. Internal energy....equals?
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
?IE= - W (work)
Q=m*L (where L is the latent heat of fusion or vaporization)

37. Capacitance formula? (there are two)
C= Q/V = e0 *A/d
The incident angle at which total internal reflection occurs (use ?r=90°)
N?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)

38. Conversion factor from atomic mass units to MeV?
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
W=qVoltage. (think C* J/C and C's cancel out)
931MeV=1amu
C= Q/V = e0 *A/d

39. Relativistic formula for time
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
F=mv²/ r
?Tstationary= Y (?Tmoving)
W=qVoltage. (think C* J/C and C's cancel out)

40. Impulse formula
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
The incident angle at which total internal reflection occurs (use ?r=90°)
1/f= 1/di + 1/do

41. Work formula
N?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
F=GM1M2/r²
Intensity a Amplitude/ d²

42. Transformer formula

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43. Light intensity is proportional to..
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Intensity a Amplitude/ d²
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Shorter ? - less diffraction - bigger shadow.

44. If speed is slow/low - index of refraction is...
Large/high
Vstationary obj.= [u+v] / [1 + uv/c²] (where u is velocity of large object - and v is velocity of "thrown" object relative to large object)
1.67*10?²7kg
?Tstationary= Y (?Tmoving)

45. Gravitational constant
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
G= 6.67 * 10?¹¹ Nm²/kg²
For every action there is an equal and opposite reaction
Ni sin?i=nrsin?r

46. Torque formula
Angle of incidence=Angle of reflection
Q=m*L (where L is the latent heat of fusion or vaporization)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V

47. Magnification equation
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
M= -di/do (=-hi/ho)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
V= 331 m/s + (.6 m/s°C)Temperature

48. Buoyant force formula
Large/high
V= 331 m/s + (.6 m/s°C)Temperature
Length stationary=Length moving/Y
Fb= mass of displaced fluid * gravity

49. Critical angle is...
The incident angle at which total internal reflection occurs (use ?r=90°)
W=qVoltage. (think C* J/C and C's cancel out)
Angle of incidence=Angle of reflection
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

50. ß? decay?
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)