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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. Buoyant force formula
Fb= mass of displaced fluid * gravity
1.67*10?²7kg
KE=1/2mv²
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)

2. K constant for electric field formula?
Low
Large/high
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
K= 9 * 10? Nm²/C²

3. Internal energy....equals?
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Longer ? - larger diffraction - smaller shadow.
?IE= - W (work)
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)

4. Law of reflection
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
The volume of the object.
Threshold frequency=F/h (= work functions/planck's constant)
Angle of incidence=Angle of reflection

5. High frequency wave shave...
Ebinding= ?m * c² (= (?m)c²)
Shorter ? - less diffraction - bigger shadow.
?Tstationary= Y (?Tmoving)
F=ILBsin? (?= angle btw. L and B)

6. Threshold frequency explanation?
W=qVoltage. (think C* J/C and C's cancel out)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Positive - focus in front of the lens (=real image)
931MeV=1amu

7. Work function F is..?
?p=f?t (where f is AVERAGE force and t is how long force is applied)
PE=mgh
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Fb= mass of displaced fluid * gravity

8. Right-hand rule
G= 6.67 * 10?¹¹ Nm²/kg²
Product of each lens's magnification
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
931MeV=1amu

9. Heat formula
Q=mc?T (where T is temperature)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Momentum is always conserved in the absence of an outside force
Length stationary=Length moving/Y

10. Formula for electric potential energy?
?= 4L + 1.6d
Q=mc?T (where T is temperature)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V

11. Formula for energy levels within any atom?

12. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
?= 4L + 1.6d
Zero.
I=mr²
Beat frequency= |F1-F2|

13. Apparent weight (weight of submerged object)
PE=mgh
F= (9/5)C+ 32
KE= (Y-1)mc² (= (Y-1)E)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)

14. Distance formula?
Intensity a Amplitude/ d²
W=qVoltage. (think C* J/C and C's cancel out)
Distance= velocity * time
W= - kq1q2 (1/r2 - 1/r1)

15. Electric force formula? (two)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Beat frequency= |F1-F2|
Felec=qE=[kq1q2]/r²

16. What is the photoelectric effect?
M= -di/do (=-hi/ho)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
V=f?
Q=m*L (where L is the latent heat of fusion or vaporization)

17. Planck's constant in J*s?
6.6310 ?³4 Js
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Intensity a Amplitude/ d²
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)

18. Voltage formula (for circuit - etc.)
Momentum is always conserved in the absence of an outside force
V=IR
Ni sin?i=nrsin?r
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)

19. Thin lens equation
1/f= 1/di + 1/do
F=mv²/ r
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Vfinal= V0 +at

20. Energy of an emitted photon formula?
P=IV=I²R=V² /R = Fd/t= Force*velocity
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)

21. deBrolglie wavelength formula

22. Formula for diffraction pattern - Anti-node to node (A-N)
(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)
For every action there is an equal and opposite reaction
Voltage=PE/q (remember Joules/Coulomb= volt)
Threshold frequency=F/h (= work functions/planck's constant)

23. Centripetal acceleration formula
A=v²/ r
P=mv (?p=m?v)
Induced current will flow opposite direction of magnetic flux.
KEmax= hf-F (= E-F= Energy of a photon - work function)

24. Sign of focus for concave lens?
Product of each lens's magnification
Positive - focus in front of the lens (=real image)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
G= 6.67 * 10?¹¹ Nm²/kg²

25. Relativistic formula for time
Angle of incidence=Angle of reflection
?Tstationary= Y (?Tmoving)
?IE= - W (work)
Etotal= E rest + KE= mc² + (Y-1)mc²

26. Work performed by charge displacement? (hopefully...won't have to know)
6.6310 ?³4 Js
W= - kq1q2 (1/r2 - 1/r1)
I=mr²
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage

27. What is the apparent weight of a floating object?
C= 3*108 m/s
Ni sin?i=nrsin?r
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
Zero.

28. OPEN PIPE FREQUENCY (Frequency/Harmonic series of a pipe opened at both ends)
For every action there is an equal and opposite reaction
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
F= (9/5)C+ 32

29. Formula for magnetic flux?
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Q=mc?T (where T is temperature)

30. Kinetic Energy formula
KE=1/2mv²
Intensity a Amplitude/ d²
?IE= - W (work)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted

31. Relativistic formula for length
931MeV=1amu
W= - kq1q2 (1/r2 - 1/r1)
Intensity a Amplitude/ d²
Length stationary=Length moving/Y

32. Work formula
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
W=qVoltage. (think C* J/C and C's cancel out)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)

33. (Full/Final) Velocity formula
931MeV=1amu
F=ILBsin? (?= angle btw. L and B)
Vfinal= V0 +at
Induced current will flow opposite direction of magnetic flux.

34. Electric field between two plates formula?
E= V/d
E= kq/r² (= f/q)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
W= - kq1q2 (1/r2 - 1/r1)

35. Velocity formula if time not given
I=mr²
Vfinal²=V0²+ 2ad
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
Fnet=ma

36. Ideal gas law
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
KE=1/2mv²
?p=f?t (where f is AVERAGE force and t is how long force is applied)

37. Gravitational constant
G= 6.67 * 10?¹¹ Nm²/kg²
E0= 8.85 * 10?¹² C²/(Nm²)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
4.14 10?¹5 eVs

38. Planck's constant in electronvolts* seconds?
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
KEmax= hf-F (= E-F= Energy of a photon - work function)
4.14 10?¹5 eVs
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)

39. Conversion factor from atomic mass units to MeV?
Threshold frequency=F/h (= work functions/planck's constant)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
931MeV=1amu
P=mv (?p=m?v)

40. (Full) Displacement formula
C= Q/V = e0 *A/d
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)

41. Newton's third law
For every action there is an equal and opposite reaction
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
Vfinal= V0 +at

42. Impulse formula
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Voltage=PE/q (remember Joules/Coulomb= volt)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Angle of incidence=Angle of reflection

43. Formula for electric field?
E=hf (= Planck's constant*frequency)
E= kq/r² (= f/q)
4.14 10?¹5 eVs
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage

44. Index of refraction formula
P=IV=I²R=V² /R = Fd/t= Force*velocity
Q=m*L (where L is the latent heat of fusion or vaporization)
N= C/velocity.
Low

45. Threshold frequency formula?

46. Torque formula
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
The volume of the object.
Low

47. Potential Energy formula
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
PE=mgh
E= V/d
Low

48. magnitude of charge on electron/proton
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
KE= (Y-1)mc² (= (Y-1)E)
1/f= 1/di + 1/do
1.6*10?¹? C

49. Binding energy explanation
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
E0= 8.85 * 10?¹² C²/(Nm²)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

50. energy in a reaction q formula?
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
F= (9/5)C+ 32