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 resistance of an OBJECT
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
V=IR
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)


2. (Full/Final) Velocity formula
Vfinal= V0 +at
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
For every action there is an equal and opposite reaction


3. Momentum formula?
F=ILBsin? (?= angle btw. L and B)
Ebinding= ?m * c² (= (?m)c²)
P=mv (?p=m?v)
KE= (Y-1)mc² (= (Y-1)E)


4. Torque formula
Vfinal= V0 +at
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
V=f?
Fnet=ma


5. Formula for electric potential energy?
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)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
6.6310 ?³4 Js
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)


6. Electric force formula? (two)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Fnet=ma
Felec=qE=[kq1q2]/r²
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)


7. magnitude of charge on electron/proton
931MeV=1amu
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
1.6*10?¹? C
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)


8. ß? decay?
E= V/d
V=f?
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Large/high


9. If you drop an object into water the volume displaced equals...
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
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)
Shorter ? - less diffraction - bigger shadow.
The volume of the object.


10. Formula for energy of a photon?

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11. Formula for velocity of waves?
V=f?
V= 331 m/s + (.6 m/s°C)Temperature
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)


12. Formula for energy levels within any atom?

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13. Energy of an emitted photon formula?
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
For every action there is an equal and opposite reaction
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Ebinding= ?m * c² (= (?m)c²)


14. What is the photoelectric effect?
Vfinal= V0 +at
1.67*10?²7kg
K= 9 * 10? Nm²/C²
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)


15. 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)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
P=mv (?p=m?v)


16. Gravitational constant
?p=f?t (where f is AVERAGE force and t is how long force is applied)
G= 6.67 * 10?¹¹ Nm²/kg²
Beat frequency= |F1-F2|
V=IR


17. Apparent weight (weight of submerged object)
6.6310 ?³4 Js
KEmax= hf-F (= E-F= Energy of a photon - work function)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
KE=1/2mv²


18. Magnetic force formula (for particle)?
Length stationary=Length moving/Y
Fb= mass of displaced fluid * gravity
The incident angle at which total internal reflection occurs (use ?r=90°)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)


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

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20. Internal energy....equals?
Voltage=PE/q (remember Joules/Coulomb= volt)
?IE= - W (work)
Etotal= E rest + KE= mc² + (Y-1)mc²
N= C/velocity.


21. speed of light
C= 3*108 m/s
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
6.6310 ?³4 Js
P=mv (?p=m?v)


22. Converting Fahrenheit to Celsius
F= (9/5)C+ 32
The volume of the object.
P=mv (?p=m?v)
W= - kq1q2 (1/r2 - 1/r1)


23. Newton's third law
C= Q/V = e0 *A/d
Zero.
For every action there is an equal and opposite reaction
Low


24. Distance formula?
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Distance= velocity * time
Longer ? - larger diffraction - smaller shadow.
W= - kq1q2 (1/r2 - 1/r1)


25. Conversion factor from atomic mass units to MeV?
Zero.
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
931MeV=1amu
I=mr²


26. Relativistic formula for time
Intensity a Amplitude/ d²
?Tstationary= Y (?Tmoving)
C= Q/V = e0 *A/d
?p=f?t (where f is AVERAGE force and t is how long force is applied)


27. deBroglie wavelength explanation
Momentum is always conserved in the absence of an outside force
?Tstationary= Y (?Tmoving)
V= 331 m/s + (.6 m/s°C)Temperature
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)


28. Right-hand rule
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
KEmax= hf-F (= E-F= Energy of a photon - work function)
Product of each lens's magnification


29. New/old gas formula?

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30. Sign of focus for concave lens?
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Positive - focus in front of the lens (=real image)
Ebinding= ?m * c² (= (?m)c²)
Q=mc?T (where T is temperature)


31. If speed is slow/low - index of refraction is...
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Beat frequency= |F1-F2|
Intensity a Amplitude/ d²
Large/high


32. Relativistic formula for velocity
1.6*10?¹? C
Eff= 1- Qc/Qh = 1- Tc/Th
M= -di/do (=-hi/ho)
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)


33. Voltage formula (for circuit - etc.)
V=IR
Momentum is always conserved in the absence of an outside force
?p=f?t (where f is AVERAGE force and t is how long force is applied)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).


34. Velocity formula if time not given
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
931MeV=1amu
Vfinal²=V0²+ 2ad
I=mr²


35. Newton's second law
F=GM1M2/r²
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
K= 9 * 10? Nm²/C²
Fnet=ma


36. Heat of fusion/vaporization fromula
Q=m*L (where L is the latent heat of fusion or vaporization)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
F=ILBsin? (?= angle btw. L and B)
P=IV=I²R=V² /R = Fd/t= Force*velocity


37. Mass defect explanation

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38. Relativistic factor Y formula
1.6*10?¹? C
E= V/d
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Y= 1/ v(1-(v/c)²)


39. Beat frequency
Distance= velocity * time
The volume of the object.
Beat frequency= |F1-F2|
6.6310 ?³4 Js


40. Binding energy formula
Ebinding= ?m * c² (= (?m)c²)
E0= 8.85 * 10?¹² C²/(Nm²)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
V=f?


41. Kinetic Energy formula
Positive - focus in front of the lens (=real image)
C= Q/V = e0 *A/d
Induced current will flow opposite direction of magnetic flux.
KE=1/2mv²


42. Thin lens equation
Threshold frequency=F/h (= work functions/planck's constant)
Fnet=ma
Fb= mass of displaced fluid * gravity
1/f= 1/di + 1/do


43. Critical angle is...
Threshold frequency=F/h (= work functions/planck's constant)
C= 3*108 m/s
The incident angle at which total internal reflection occurs (use ?r=90°)
Length stationary=Length moving/Y


44. Ideal gas law
C= 3*108 m/s
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
I=mr²
E= V/d


45. Transformer formula

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46. Formula for how velocity changes in air? (probably don't have to know)
PE=mgh
V= 331 m/s + (.6 m/s°C)Temperature
C= Q/V = e0 *A/d
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)


47. Low frequency waves have...
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Eff= 1- Qc/Qh = 1- Tc/Th
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Longer ? - larger diffraction - smaller shadow.


48. Electric field between two plates formula?
E= V/d
?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
W= - kq1q2 (1/r2 - 1/r1)


49. Magnification equation
Etotal= E rest + KE= mc² + (Y-1)mc²
C= 3*108 m/s
Longer ? - larger diffraction - smaller shadow.
M= -di/do (=-hi/ho)


50. Planck's constant in electronvolts* seconds?
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
4.14 10?¹5 eVs
Threshold frequency=F/h (= work functions/planck's constant)