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. Magnetic force formula (for wire)?
F=ILBsin? (?= angle btw. L and B)
1/f= 1/di + 1/do
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)
Beat frequency= |F1-F2|


2. If speed is slow/low - index of refraction is...
Length stationary=Length moving/Y
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
6.6310 ?³4 Js
Large/high


3. Lenz's law
Induced current will flow opposite direction of magnetic flux.
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Large/high
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)


4. Binding energy formula
E=hf (= Planck's constant*frequency)
Eff= 1- Qc/Qh = 1- Tc/Th
Momentum is always conserved in the absence of an outside force
Ebinding= ?m * c² (= (?m)c²)


5. (Full) Displacement formula
Distance= velocity * time
I=mr²
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)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)


6. Converting Fahrenheit to Celsius
Threshold frequency=F/h (= work functions/planck's constant)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
F= (9/5)C+ 32
Longer ? - larger diffraction - smaller shadow.


7. Power formula?
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
V=IR
P=IV=I²R=V² /R = Fd/t= Force*velocity
Zero.


8. Threshold frequency explanation?
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
M= -di/do (=-hi/ho)
Voltage=PE/q (remember Joules/Coulomb= volt)


9. Gravitational constant
G= 6.67 * 10?¹¹ Nm²/kg²
F=GM1M2/r²
931MeV=1amu
Beat frequency= |F1-F2|


10. (Full/Final) Velocity formula
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
A=v²/ r
Fb= mass of displaced fluid * gravity
Vfinal= V0 +at


11. What is the apparent weight of a floating object?
931MeV=1amu
Zero.
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Induced current will flow opposite direction of magnetic flux.


12. Newton's third law
1.67*10?²7kg
M= -di/do (=-hi/ho)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
For every action there is an equal and opposite reaction


13. Threshold frequency formula?

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14. deBroglie wavelength explanation
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
?= 4L + 1.6d
Q=m*L (where L is the latent heat of fusion or vaporization)
Vfinal²=V0²+ 2ad


15. Formula for energy levels within any atom?

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16. High frequency wave shave...
Shorter ? - less diffraction - bigger shadow.
F=mv²/ r
N= C/velocity.
W=qVoltage. (think C* J/C and C's cancel out)


17. Planck's constant in electronvolts* seconds?
Q=mc?T (where T is temperature)
4.14 10?¹5 eVs
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)


18. Buoyant force formula
Felec=qE=[kq1q2]/r²
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
Fb= mass of displaced fluid * gravity


19. New/old gas formula?

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20. Momentum formula?
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Vfinal²=V0²+ 2ad
Momentum is always conserved in the absence of an outside force
P=mv (?p=m?v)


21. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
?= 4L + 1.6d
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)


22. 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)
I=mr²
E= V/d
Vfinal= V0 +at


23. Efficiency of an engine formula
A=v²/ r
Eff= 1- Qc/Qh = 1- Tc/Th
Large/high
?Tstationary= Y (?Tmoving)


24. Formula for magnetic flux?
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
E=hf (= Planck's constant*frequency)
Beat frequency= |F1-F2|


25. deBrolglie wavelength formula

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26. Relativistic formula for time
Angle of incidence=Angle of reflection
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
P=IV=I²R=V² /R = Fd/t= Force*velocity
?Tstationary= Y (?Tmoving)


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

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28. Torque formula
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
F=ILBsin? (?= angle btw. L and B)
W= - kq1q2 (1/r2 - 1/r1)


29. Maximum KE with which an emitted electron leaves is...?
Positive - focus in front of the lens (=real image)
KEmax= hf-F (= E-F= Energy of a photon - work function)
E= V/d
Low


30. Relativistic formula for velocity
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Length stationary=Length moving/Y
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. Transformer formula

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32. Centripetal acceleration formula
A=v²/ r
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)
Eff= 1- Qc/Qh = 1- Tc/Th
P=IV=I²R=V² /R = Fd/t= Force*velocity


33. Internal energy....equals?
?IE= - W (work)
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.
Positive - focus in front of the lens (=real image)


34. If you drop an object into water the volume displaced equals...
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Felec=qE=[kq1q2]/r²
For every action there is an equal and opposite reaction
The volume of the object.


35. Conservation of momentum
G= 6.67 * 10?¹¹ Nm²/kg²
Momentum is always conserved in the absence of an outside force
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)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.


36. Work function F is..?
F=ILBsin? (?= angle btw. L and B)
Angle of incidence=Angle of reflection
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Length stationary=Length moving/Y


37. Capacitance constant
Beat frequency= |F1-F2|
C= 3*108 m/s
The incident angle at which total internal reflection occurs (use ?r=90°)
E0= 8.85 * 10?¹² C²/(Nm²)


38. Capacitance formula? (there are two)
Beat frequency= |F1-F2|
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
C= Q/V = e0 *A/d
V= 331 m/s + (.6 m/s°C)Temperature


39. OPEN PIPE FREQUENCY (Frequency/Harmonic series of a pipe opened at both ends)
Ebinding= ?m * c² (= (?m)c²)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
K= 9 * 10? Nm²/C²
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)


40. Magnification equation
1.67*10?²7kg
M= -di/do (=-hi/ho)
?IE= - W (work)
?p=f?t (where f is AVERAGE force and t is how long force is applied)


41. Newton's first law (Law of...)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
Shorter ? - less diffraction - bigger shadow.
G= 6.67 * 10?¹¹ Nm²/kg²
4.14 10?¹5 eVs


42. Formula for velocity of waves?
V=f?
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Y= 1/ v(1-(v/c)²)


43. Index of refraction formula
F= (9/5)C+ 32
Vfinal²=V0²+ 2ad
E= V/d
N= C/velocity.


44. Relativistic factor Y formula
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Y= 1/ v(1-(v/c)²)
I=mr²
931MeV=1amu


45. Total KE formula
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
C= 3*108 m/s
Fnet=ma
Etotal= E rest + KE= mc² + (Y-1)mc²


46. Formula for energy of a photon?

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47. Formula for how velocity changes in air? (probably don't have to know)
Ni sin?i=nrsin?r
V= 331 m/s + (.6 m/s°C)Temperature
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Eff= 1- Qc/Qh = 1- Tc/Th


48. Beat frequency
KE= (Y-1)mc² (= (Y-1)E)
?IE= - W (work)
Beat frequency= |F1-F2|
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)


49. Distance formula?
Distance= velocity * time
The incident angle at which total internal reflection occurs (use ?r=90°)
Fb= mass of displaced fluid * gravity
Product of each lens's magnification


50. Energy of an emitted photon formula?
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
6.6310 ?³4 Js
KEmax= hf-F (= E-F= Energy of a photon - work function)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)