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SAT Subject Test: Physics Formulas

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. Total KE formula
Ebinding= ?m * c² (= (?m)c²)
1.6*10?¹? C
E=hf (= Planck's constant*frequency)
Etotal= E rest + KE= mc² + (Y-1)mc²

2. Momentum formula?
P=mv (?p=m?v)
F=mv²/ r
Ebinding= ?m * c² (= (?m)c²)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)

3. Apparent weight (weight of submerged object)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Fnet=ma
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
KE= (Y-1)mc² (= (Y-1)E)

4. (Full/Final) Velocity formula
W= - kq1q2 (1/r2 - 1/r1)
931MeV=1amu
Vfinal= V0 +at
M= -di/do (=-hi/ho)

5. Work formula
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Positive - focus in front of the lens (=real image)
Product of each lens's magnification
Low

6. Sign of focus for convex lens?
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
The volume of the object.
Negative - focus behind the lens (= virtual image)
C= Q/V = e0 *A/d

7. Law of refraction
F=mv²/ r
KE= (Y-1)mc² (= (Y-1)E)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Ni sin?i=nrsin?r

8. Law of reflection
?Tstationary= Y (?Tmoving)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
E=hf (= Planck's constant*frequency)
Angle of incidence=Angle of reflection

9. Work performed by charge displacement? (hopefully...won't have to know)
G= 6.67 * 10?¹¹ Nm²/kg²
Shorter ? - less diffraction - bigger shadow.
W= - kq1q2 (1/r2 - 1/r1)
V=IR

10. Formula for energy of a photon?

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11. Formula for resistance of an OBJECT
4.14 10?¹5 eVs
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
KEmax= hf-F (= E-F= Energy of a photon - work function)

12. Conversion factor from atomic mass units to MeV?
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
931MeV=1amu
I=mr²

13. Torque formula
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
M= -di/do (=-hi/ho)

14. Index of refraction formula
F= (9/5)C+ 32
1.67*10?²7kg
N= C/velocity.
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)

15. Electric force formula? (two)
Felec=qE=[kq1q2]/r²
P=IV=I²R=V² /R = Fd/t= Force*velocity
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
?IE= - W (work)

16. Centripetal acceleration formula
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Threshold frequency=F/h (= work functions/planck's constant)
Ni sin?i=nrsin?r
A=v²/ r

17. Capacitance constant
N= C/velocity.
W=qVoltage. (think C* J/C and C's cancel out)
F=ILBsin? (?= angle btw. L and B)
E0= 8.85 * 10?¹² C²/(Nm²)

18. Converting Fahrenheit to Celsius
F= (9/5)C+ 32
Distance= velocity * time
Positive - focus in front of the lens (=real image)
E0= 8.85 * 10?¹² C²/(Nm²)

19. Activity of a radioactive sample formula? (probably don't have to know)
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)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
?p=f?t (where f is AVERAGE force and t is how long force is applied)

20. What is the photoelectric effect?
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
?= 4L + 1.6d
KE= (Y-1)mc² (= (Y-1)E)
The incident angle at which total internal reflection occurs (use ?r=90°)

21. Distance formula?
C= 3*108 m/s
Distance= velocity * time
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Longer ? - larger diffraction - smaller shadow.

22. Planck's constant in electronvolts* seconds?
4.14 10?¹5 eVs
M= -di/do (=-hi/ho)
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.

23. Newton's first law (Law of...)
?= 4L + 1.6d
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

24. Relativistic factor Y formula
Y= 1/ v(1-(v/c)²)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
A=v²/ r
The volume of the object.

25. Moment of Inertia (a.k.a. rotational mass)
W= - kq1q2 (1/r2 - 1/r1)
I=mr²
E0= 8.85 * 10?¹² C²/(Nm²)
Angle of incidence=Angle of reflection

26. speed of light
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
C= 3*108 m/s
KE= (Y-1)mc² (= (Y-1)E)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)

27. Binding energy explanation
E= V/d
(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)
C= 3*108 m/s
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)

28. Maximum KE with which an emitted electron leaves is...?
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Length stationary=Length moving/Y
?= 4L + 1.6d
KEmax= hf-F (= E-F= Energy of a photon - work function)

29. Relativistic formula for (kinetic) energy
P=mv (?p=m?v)
F= (9/5)C+ 32
KE= (Y-1)mc² (= (Y-1)E)
E= V/d

30. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
P=mv (?p=m?v)
?= 4L + 1.6d
C= Q/V = e0 *A/d

31. Internal energy....equals?
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Beat frequency= |F1-F2|
?IE= - W (work)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

32. New/old gas formula?

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33. Buoyant force formula
Vfinal= V0 +at
V=IR
(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= mass of displaced fluid * gravity

34. Sign of focus for concave lens?
Etotal= E rest + KE= mc² + (Y-1)mc²
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Positive - focus in front of the lens (=real image)
C= 3*108 m/s

35. Voltage formula (think units of volts are what?) (NOT in terms of I and R)
Induced current will flow opposite direction of magnetic flux.
Voltage=PE/q (remember Joules/Coulomb= volt)
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
N= C/velocity.

36. How to find total magnification?

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37. If speed is slow/low - index of refraction is...
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
F= (9/5)C+ 32
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Large/high

38. deBrolglie wavelength formula

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39. Threshold frequency explanation?
A=v²/ r
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Angle of incidence=Angle of reflection

40. Magnification equation
M= -di/do (=-hi/ho)
E= V/d
F=GM1M2/r²
V= 331 m/s + (.6 m/s°C)Temperature

41. deBroglie wavelength explanation
Ni sin?i=nrsin?r
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
C= Q/V = e0 *A/d

42. Light intensity is proportional to..
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
F=GM1M2/r²
KE= (Y-1)mc² (= (Y-1)E)
Intensity a Amplitude/ d²

43. Gravitational constant
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
Vfinal= V0 +at
KE=1/2mv²
G= 6.67 * 10?¹¹ Nm²/kg²

44. Formula for electric potential energy?
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
K= 9 * 10? Nm²/C²
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Product of each lens's magnification

45. Conservation of momentum
?IE= - W (work)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Momentum is always conserved in the absence of an outside force

46. Capacitance formula? (there are two)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
C= Q/V = e0 *A/d
?p=f?t (where f is AVERAGE force and t is how long force is applied)

47. Beat frequency
F= (9/5)C+ 32
Beat frequency= |F1-F2|
K= 9 * 10? Nm²/C²
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)

48. Voltage formula (for circuit - etc.)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
V= 331 m/s + (.6 m/s°C)Temperature
V=IR
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)

49. (Full) Displacement formula
Product of each lens's magnification
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Q=m*L (where L is the latent heat of fusion or vaporization)
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)

50. Formula for magnetic flux?
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Length stationary=Length moving/Y
E= kq/r² (= f/q)