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. Formula for energy of a photon?

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2. Centripetal force formula
F=mv²/ r
Q=m*L (where L is the latent heat of fusion or vaporization)
F= (9/5)C+ 32
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)


3. Beat frequency
Beat frequency= |F1-F2|
G= 6.67 * 10?¹¹ Nm²/kg²
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
6.6310 ?³4 Js


4. Electric force formula? (two)
Ni sin?i=nrsin?r
(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
Felec=qE=[kq1q2]/r²


5. Capacitance constant
Intensity a Amplitude/ d²
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
A=v²/ r
E0= 8.85 * 10?¹² C²/(Nm²)


6. Law of refraction
V=f?
Ni sin?i=nrsin?r
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Product of each lens's magnification


7. What is the photoelectric effect?
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Momentum is always conserved in the absence of an outside force
W=qVoltage. (think C* J/C and C's cancel out)


8. Formula for velocity of waves?
V=f?
Fb= mass of displaced fluid * gravity
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
F=mv²/ r


9. Electron capture
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Etotal= E rest + KE= mc² + (Y-1)mc²
Q=m*L (where L is the latent heat of fusion or vaporization)
Voltage=PE/q (remember Joules/Coulomb= volt)


10. deBrolglie wavelength formula

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11. Impulse formula
?IE= - W (work)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
E= kq/r² (= f/q)
V= 331 m/s + (.6 m/s°C)Temperature


12. Law of reflection
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Large/high
4.14 10?¹5 eVs
Angle of incidence=Angle of reflection


13. Centripetal acceleration formula
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
V=IR
A=v²/ r


14. Work performed by charge displacement? (hopefully...won't have to know)
Induced current will flow opposite direction of magnetic flux.
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)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
W= - kq1q2 (1/r2 - 1/r1)


15. Power formula?
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
P=IV=I²R=V² /R = Fd/t= Force*velocity
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted


16. Capacitance formula? (there are two)
Momentum is always conserved in the absence of an outside force
Beat frequency= |F1-F2|
C= Q/V = e0 *A/d
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)


17. ß? decay?
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Shorter ? - less diffraction - bigger shadow.
KE=1/2mv²
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)


18. Magnetic force formula (for wire)?
Large/high
1.6*10?¹? C
F=ILBsin? (?= angle btw. L and B)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)


19. Threshold frequency explanation?
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
F= (9/5)C+ 32
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted


20. magnitude of charge on electron/proton
1.6*10?¹? C
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
?IE= - W (work)
Beat frequency= |F1-F2|


21. Internal energy....equals?
Large/high
Positive - focus in front of the lens (=real image)
E0= 8.85 * 10?¹² C²/(Nm²)
?IE= - W (work)


22. High frequency wave shave...
?IE= - W (work)
Shorter ? - less diffraction - bigger shadow.
Q=mc?T (where T is temperature)
Length stationary=Length moving/Y


23. Magnification equation
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
M= -di/do (=-hi/ho)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration


24. Low frequency waves have...
Longer ? - larger diffraction - smaller shadow.
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
W= - kq1q2 (1/r2 - 1/r1)
Angle of incidence=Angle of reflection


25. Work function F is..?
V= 331 m/s + (.6 m/s°C)Temperature
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
?Tstationary= Y (?Tmoving)
Product of each lens's magnification


26. If speed is slow/low - index of refraction is...
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
P=IV=I²R=V² /R = Fd/t= Force*velocity
Large/high
Negative - focus behind the lens (= virtual image)


27. Planck's constant in electronvolts* seconds?
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/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)
4.14 10?¹5 eVs


28. Momentum formula?
Length stationary=Length moving/Y
The incident angle at which total internal reflection occurs (use ?r=90°)
P=IV=I²R=V² /R = Fd/t= Force*velocity
P=mv (?p=m?v)


29. Planck's constant in J*s?
Distance= velocity * time
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
F=ILBsin? (?= angle btw. L and B)
6.6310 ?³4 Js


30. Formula for electric field?
E= kq/r² (= f/q)
Intensity a Amplitude/ d²
P=IV=I²R=V² /R = Fd/t= Force*velocity
Length stationary=Length moving/Y


31. Potential Energy formula
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
931MeV=1amu
PE=mgh
1.6*10?¹? C


32. Mass defect explanation

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33. Conversion factor from atomic mass units to MeV?
931MeV=1amu
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
The incident angle at which total internal reflection occurs (use ?r=90°)


34. Work (only in terms of charge and voltage) formula

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35. (Full/Final) Velocity formula
Vfinal= V0 +at
E=hf (= Planck's constant*frequency)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
For every action there is an equal and opposite reaction


36. Kinetic Energy formula
Longer ? - larger diffraction - smaller shadow.
4.14 10?¹5 eVs
KE=1/2mv²
Low


37. Relativistic formula for length
Ebinding= ?m * c² (= (?m)c²)
Ni sin?i=nrsin?r
Length stationary=Length moving/Y
M= -di/do (=-hi/ho)


38. Formula for electric potential energy?
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
PE=mgh
P=mv (?p=m?v)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V


39. OPEN PIPE FREQUENCY (Frequency/Harmonic series of a pipe opened at both ends)
Q=mc?T (where T is temperature)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
(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)


40. speed of light
Vfinal= V0 +at
Angle of incidence=Angle of reflection
C= 3*108 m/s
?IE= - W (work)


41. Maximum KE with which an emitted electron leaves is...?
KEmax= hf-F (= E-F= Energy of a photon - work function)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
The volume of the object.
?Tstationary= Y (?Tmoving)


42. Sign of focus for concave lens?
V=IR
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
Positive - focus in front of the lens (=real image)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)


43. Sign of focus for convex lens?
Negative - focus behind the lens (= virtual image)
?= 4L + 1.6d
Large/high
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)


44. Relativistic factor Y formula
F= (9/5)C+ 32
Ni sin?i=nrsin?r
W=qVoltage. (think C* J/C and C's cancel out)
Y= 1/ v(1-(v/c)²)


45. Converting Fahrenheit to Celsius
Vfinal= V0 +at
F= (9/5)C+ 32
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)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)


46. Magnetic force formula (for particle)?
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Voltage=PE/q (remember Joules/Coulomb= volt)
C= 3*108 m/s
E=hf (= Planck's constant*frequency)


47. Faraday's law
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
F=GM1M2/r²


48. deBroglie wavelength explanation
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
V=IR
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)


49. Threshold frequency formula?

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50. Ideal gas law
Intensity a Amplitude/ d²
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
For every action there is an equal and opposite reaction