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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. Magnetic force formula (for particle)?
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
1/f= 1/di + 1/do
Distance= velocity * time
KEmax= hf-F (= E-F= Energy of a photon - work function)

2. energy in a reaction q formula?
E= V/d
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Large/high
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)

3. ß? decay?
Ni sin?i=nrsin?r
Positive - focus in front of the lens (=real image)
W=qVoltage. (think C* J/C and C's cancel out)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)

4. Relativistic formula for time
W=qVoltage. (think C* J/C and C's cancel out)
PE=mgh
?Tstationary= Y (?Tmoving)
Length stationary=Length moving/Y

5. Critical angle is...
1.6*10?¹? C
The incident angle at which total internal reflection occurs (use ?r=90°)
Q=m*L (where L is the latent heat of fusion or vaporization)
Threshold frequency=F/h (= work functions/planck's constant)

6. Sign of focus for convex lens?
931MeV=1amu
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Negative - focus behind the lens (= virtual image)
1/f= 1/di + 1/do

7. Momentum formula?
6.6310 ?³4 Js
Ebinding= ?m * c² (= (?m)c²)
P=mv (?p=m?v)
KEmax= hf-F (= E-F= Energy of a photon - work function)

8. Beat frequency
Beat frequency= |F1-F2|
Length stationary=Length moving/Y
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)
E= kq/r² (= f/q)

9. Formula for energy of a photon?

10. Relativistic formula for (kinetic) energy
C= 3*108 m/s
K= 9 * 10? Nm²/C²
KE= (Y-1)mc² (= (Y-1)E)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)

11. Sign of focus for concave lens?
?Tstationary= Y (?Tmoving)
Positive - focus in front of the lens (=real image)
F= (9/5)C+ 32
Ebinding= ?m * c² (= (?m)c²)

12. Total KE formula
(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)
Etotal= E rest + KE= mc² + (Y-1)mc²
Shorter ? - less diffraction - bigger shadow.
The incident angle at which total internal reflection occurs (use ?r=90°)

13. Potential Energy formula
Fnet=ma
PE=mgh
V=f?
Shorter ? - less diffraction - bigger shadow.

14. Index of refraction formula
N= C/velocity.
The volume of the object.
Product of each lens's magnification
E= V/d

15. Formula for electric potential energy?
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
W=qVoltage. (think C* J/C and C's cancel out)

16. Formula for energy levels within any atom?

17. Newton's third law
Length stationary=Length moving/Y
6.6310 ?³4 Js
For every action there is an equal and opposite reaction
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)

18. Gravitational constant
Ni sin?i=nrsin?r
G= 6.67 * 10?¹¹ Nm²/kg²
Momentum is always conserved in the absence of an outside force
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V

19. Efficiency of an engine formula
For every action there is an equal and opposite reaction
E= kq/r² (= f/q)
Eff= 1- Qc/Qh = 1- Tc/Th
1.67*10?²7kg

20. Formula for diffraction pattern - Anti-node to node (A-N)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Product of each lens's magnification
(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)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)

21. If speed is slow/low - index of refraction is...
Etotal= E rest + KE= mc² + (Y-1)mc²
Large/high
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
?Tstationary= Y (?Tmoving)

22. Heat of fusion/vaporization fromula
Q=m*L (where L is the latent heat of fusion or vaporization)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
E=hf (= Planck's constant*frequency)
Induced current will flow opposite direction of magnetic flux.

23. Capacitance constant
E0= 8.85 * 10?¹² C²/(Nm²)
Fb= mass of displaced fluid * gravity
Length stationary=Length moving/Y
F=GM1M2/r²

24. Faraday's law
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)
Longer ? - larger diffraction - smaller shadow.
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)

25. Capacitance formula? (there are two)
C= Q/V = e0 *A/d
Intensity a Amplitude/ d²
Ni sin?i=nrsin?r
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)

26. Formula for resistance of an OBJECT
Q=m*L (where L is the latent heat of fusion or vaporization)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Ebinding= ?m * c² (= (?m)c²)

27. speed of light
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
C= 3*108 m/s
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
?p=f?t (where f is AVERAGE force and t is how long force is applied)

28. Distance formula?
(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)
G= 6.67 * 10?¹¹ Nm²/kg²
KEmax= hf-F (= E-F= Energy of a photon - work function)
Distance= velocity * time

29. deBrolglie wavelength formula

30. mass of a proton/neutron (there's a slight difference but ignore it - neutron has slightly more mass)
Q=mc?T (where T is temperature)
1.67*10?²7kg
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
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. Light intensity is proportional to..
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)
KEmax= hf-F (= E-F= Energy of a photon - work function)
Intensity a Amplitude/ d²
Ni sin?i=nrsin?r

32. ONE END CAPPED PIPE FREQUENCY (Frequency/Harmonic series of a pipe closed at one ned)
F=mv²/ r
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Vfinal= V0 +at

33. Kinetic Energy formula
KE=1/2mv²
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)
Positive - focus in front of the lens (=real image)
PE=mgh

34. ß? decay?
N= C/velocity.
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
F= (9/5)C+ 32
Momentum is always conserved in the absence of an outside force

35. Magnification equation
P=IV=I²R=V² /R = Fd/t= Force*velocity
M= -di/do (=-hi/ho)
C= Q/V = e0 *A/d
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted

36. Power formula?
P=IV=I²R=V² /R = Fd/t= Force*velocity
P=mv (?p=m?v)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
F=mv²/ r

37. How to find total magnification?

38. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
?= 4L + 1.6d
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
Voltage=PE/q (remember Joules/Coulomb= volt)
V=IR

39. Relativistic formula for velocity
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
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)
C= Q/V = e0 *A/d
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)

40. Newton's second law
Length stationary=Length moving/Y
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)
Fnet=ma
Felec=qE=[kq1q2]/r²

41. Voltage formula (think units of volts are what?) (NOT in terms of I and R)
Longer ? - larger diffraction - smaller shadow.
Voltage=PE/q (remember Joules/Coulomb= volt)
1/f= 1/di + 1/do
For every action there is an equal and opposite reaction

42. OPEN PIPE FREQUENCY (Frequency/Harmonic series of a pipe opened at both ends)
N= C/velocity.
(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)
E=hf (= Planck's constant*frequency)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)

43. What is the apparent weight of a floating object?
C= 3*108 m/s
KE= (Y-1)mc² (= (Y-1)E)
Zero.
E=hf (= Planck's constant*frequency)

44. Converting Fahrenheit to Celsius
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
V= 331 m/s + (.6 m/s°C)Temperature
F= (9/5)C+ 32
Distance= velocity * time

45. Torque formula
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
KE= (Y-1)mc² (= (Y-1)E)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Vfinal= V0 +at

46. Transformer formula

47. Heat formula
Q=mc?T (where T is temperature)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Fb= mass of displaced fluid * gravity
I=mr²

48. Magnetic force formula (for wire)?
Angle of incidence=Angle of reflection
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
F=ILBsin? (?= angle btw. L and B)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

49. Binding energy formula
?= 4L + 1.6d
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Ebinding= ?m * c² (= (?m)c²)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V

50. Binding energy explanation
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
The volume of the object.
V=f?