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. Relativistic formula for velocity
N= C/velocity.
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
Fb= mass of displaced fluid * gravity
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)


2. Electric force formula? (two)
Vfinal²=V0²+ 2ad
KE=1/2mv²
Felec=qE=[kq1q2]/r²
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)


3. Index of refraction formula
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
1.6*10?¹? C
N= C/velocity.


4. Transformer formula

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5. Formula for electric field?
P=mv (?p=m?v)
Length stationary=Length moving/Y
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
E= kq/r² (= f/q)


6. Moment of Inertia (a.k.a. rotational mass)
I=mr²
(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)
Longer ? - larger diffraction - smaller shadow.
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration


7. deBroglie wavelength explanation
1.6*10?¹? C
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
1.67*10?²7kg
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)


8. 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)
KE=1/2mv²
Y= 1/ v(1-(v/c)²)
Fb= mass of displaced fluid * gravity


9. Elastic potential energy for a spring formula
Felec=qE=[kq1q2]/r²
Angle of incidence=Angle of reflection
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)


10. Light intensity is proportional to..
The volume of the object.
Etotal= E rest + KE= mc² + (Y-1)mc²
Intensity a Amplitude/ d²
Threshold frequency=F/h (= work functions/planck's constant)


11. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
?= 4L + 1.6d
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Ebinding= ?m * c² (= (?m)c²)
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)


12. ß? decay?
The incident angle at which total internal reflection occurs (use ?r=90°)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
6.6310 ?³4 Js


13. magnitude of charge on electron/proton
1.6*10?¹? C
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Large/high
F=mv²/ r


14. Total KE formula
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Momentum is always conserved in the absence of an outside force
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)
Etotal= E rest + KE= mc² + (Y-1)mc²


15. Voltage formula (think units of volts are what?) (NOT in terms of I and R)
Voltage=PE/q (remember Joules/Coulomb= volt)
Positive - focus in front of the lens (=real image)
P=IV=I²R=V² /R = Fd/t= Force*velocity
Zero.


16. deBrolglie wavelength formula

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17. Relativistic formula for (kinetic) energy
?Tstationary= Y (?Tmoving)
KE= (Y-1)mc² (= (Y-1)E)
Shorter ? - less diffraction - bigger shadow.
C= 3*108 m/s


18. Distance formula?
Distance= velocity * time
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
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. Magnetic force formula (for wire)?
F=ILBsin? (?= angle btw. L and B)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Beat frequency= |F1-F2|
Fb= mass of displaced fluid * gravity


20. ß? decay?
Induced current will flow opposite direction of magnetic flux.
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Vfinal= V0 +at


21. Binding energy formula
W=qVoltage. (think C* J/C and C's cancel out)
Ebinding= ?m * c² (= (?m)c²)
E= kq/r² (= f/q)
Intensity a Amplitude/ d²


22. Relativistic factor Y formula
E0= 8.85 * 10?¹² C²/(Nm²)
Y= 1/ v(1-(v/c)²)
Distance= velocity * time
931MeV=1amu


23. If speed is slow/low - index of refraction is...
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
E= V/d
Large/high
Vfinal²=V0²+ 2ad


24. Formula for energy levels within any atom?

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25. Newton's first law (Law of...)
The incident angle at which total internal reflection occurs (use ?r=90°)
E=hf (= Planck's constant*frequency)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
4.14 10?¹5 eVs


26. (Full) Displacement formula
?Tstationary= Y (?Tmoving)
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)


27. If speed is high - index of refraction is....
1.6*10?¹? C
KE= (Y-1)mc² (= (Y-1)E)
Low
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)


28. Converting Fahrenheit to Celsius
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Negative - focus behind the lens (= virtual image)
F= (9/5)C+ 32
F=GM1M2/r²


29. Newton's third law
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)
The incident angle at which total internal reflection occurs (use ?r=90°)
G= 6.67 * 10?¹¹ Nm²/kg²
For every action there is an equal and opposite reaction


30. New/old gas formula?

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31. Formula for diffraction pattern - Anti-node to node (A-N)
Fb= mass of displaced fluid * gravity
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
(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


32. Magnification equation
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Distance= velocity * time
M= -di/do (=-hi/ho)
Threshold frequency=F/h (= work functions/planck's constant)


33. What is the apparent weight of a floating object?
Zero.
C= Q/V = e0 *A/d
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
?= 4L + 1.6d


34. Critical angle is...
F= (9/5)C+ 32
The incident angle at which total internal reflection occurs (use ?r=90°)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
?p=f?t (where f is AVERAGE force and t is how long force is applied)


35. Formula for diffraction pattern - Anti-node to Anti-node (A-A)
Fnet=ma
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
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)
C= 3*108 m/s


36. Graviational force formula
F=GM1M2/r²
V=IR
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)


37. Formula for how velocity changes in air? (probably don't have to know)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
V= 331 m/s + (.6 m/s°C)Temperature
PE=mgh
1.6*10?¹? C


38. Energy of an emitted photon formula?
V= 331 m/s + (.6 m/s°C)Temperature
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Zero.
W=qVoltage. (think C* J/C and C's cancel out)


39. Planck's constant in J*s?
PE=mgh
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
6.6310 ?³4 Js
Angle of incidence=Angle of reflection


40. Ideal gas law
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Shorter ? - less diffraction - bigger shadow.


41. How to find total magnification?

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42. Efficiency of an engine formula
Fnet=ma
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
Eff= 1- Qc/Qh = 1- Tc/Th
Vfinal²=V0²+ 2ad


43. energy in a reaction q formula?
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
(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)
W= - kq1q2 (1/r2 - 1/r1)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)


44. Formula for magnetic flux?
E0= 8.85 * 10?¹² C²/(Nm²)
?Tstationary= Y (?Tmoving)
KE=1/2mv²
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)


45. Faraday's law
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
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.
Vfinal= V0 +at


46. Heat formula
P=IV=I²R=V² /R = Fd/t= Force*velocity
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
C= 3*108 m/s
Q=mc?T (where T is temperature)


47. Formula for electric potential energy?
The volume of the object.
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
N= C/velocity.
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V


48. Momentum formula?
F=GM1M2/r²
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Zero.
P=mv (?p=m?v)


49. Buoyant force formula
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Fb= mass of displaced fluid * gravity
KEmax= hf-F (= E-F= Energy of a photon - work function)
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)


50. Magnetic force formula (for particle)?
4.14 10?¹5 eVs
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
KE=1/2mv²
Intensity a Amplitude/ d²