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. Work performed by charge displacement? (hopefully...won't have to know)
KEmax= hf-F (= E-F= Energy of a photon - work function)
W= - kq1q2 (1/r2 - 1/r1)
Induced current will flow opposite direction of magnetic flux.
V= 331 m/s + (.6 m/s°C)Temperature


2. Ideal gas law
Etotal= E rest + KE= mc² + (Y-1)mc²
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Low
The incident angle at which total internal reflection occurs (use ?r=90°)


3. Formula for how velocity changes in air? (probably don't have to know)
M= -di/do (=-hi/ho)
V= 331 m/s + (.6 m/s°C)Temperature
E= V/d
Q=mc?T (where T is temperature)


4. Relativistic formula for length
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Large/high
Length stationary=Length moving/Y


5. Sign of focus for convex lens?
Negative - focus behind the lens (= virtual image)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)


6. Newton's second law
?Tstationary= Y (?Tmoving)
Induced current will flow opposite direction of magnetic flux.
Fnet=ma
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)


7. Magnetic force formula (for particle)?
Momentum is always conserved in the absence of an outside force
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Threshold frequency=F/h (= work functions/planck's constant)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)


8. Maximum KE with which an emitted electron leaves is...?
Longer ? - larger diffraction - smaller shadow.
KEmax= hf-F (= E-F= Energy of a photon - work function)
F= (9/5)C+ 32
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)


9. Mass defect explanation

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10. Power formula?
P=IV=I²R=V² /R = Fd/t= Force*velocity
C= Q/V = e0 *A/d
Induced current will flow opposite direction of magnetic flux.
I=mr²


11. Relativistic factor Y formula
For every action there is an equal and opposite reaction
Fb= mass of displaced fluid * gravity
Y= 1/ v(1-(v/c)²)
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)


12. What is the apparent weight of a floating object?
Shorter ? - less diffraction - bigger shadow.
C= 3*108 m/s
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Zero.


13. 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)
Negative - focus behind the lens (= virtual image)
Fb= mass of displaced fluid * gravity
P=mv (?p=m?v)


14. New/old gas formula?

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15. Centripetal force formula
F=mv²/ r
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
Threshold frequency=F/h (= work functions/planck's constant)
Momentum is always conserved in the absence of an outside force


16. Distance formula?
The incident angle at which total internal reflection occurs (use ?r=90°)
Distance= velocity * time
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
E=hf (= Planck's constant*frequency)


17. Heat of fusion/vaporization fromula
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Q=m*L (where L is the latent heat of fusion or vaporization)
931MeV=1amu


18. Electric force formula? (two)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Felec=qE=[kq1q2]/r²
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Distance= velocity * time


19. Conversion factor from atomic mass units to MeV?
N= C/velocity.
PE=mgh
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)
931MeV=1amu


20. Buoyant force formula
Fb= mass of displaced fluid * gravity
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)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration


21. Magnification equation
W=qVoltage. (think C* J/C and C's cancel out)
6.6310 ?³4 Js
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
M= -di/do (=-hi/ho)


22. Formula for magnetic flux?
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
V=f?
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)


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

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24. OPEN PIPE FREQUENCY (Frequency/Harmonic series of a pipe opened at both ends)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Eff= 1- Qc/Qh = 1- Tc/Th


25. What is the photoelectric effect?
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
1/f= 1/di + 1/do


26. Electric field between two plates formula?
?IE= - W (work)
E= V/d
C= 3*108 m/s
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)


27. Efficiency of an engine formula
Eff= 1- Qc/Qh = 1- Tc/Th
Felec=qE=[kq1q2]/r²
W= - kq1q2 (1/r2 - 1/r1)
E= V/d


28. Binding energy formula
?= 4L + 1.6d
Ebinding= ?m * c² (= (?m)c²)
1.6*10?¹? C
Shorter ? - less diffraction - bigger shadow.


29. Formula for energy levels within any atom?

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30. Magnetic force formula (for wire)?
M= -di/do (=-hi/ho)
F=ILBsin? (?= angle btw. L and B)
Q=m*L (where L is the latent heat of fusion or vaporization)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)


31. High frequency wave shave...
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)
Intensity a Amplitude/ d²
Y= 1/ v(1-(v/c)²)
Shorter ? - less diffraction - bigger shadow.


32. Internal energy....equals?
A=v²/ r
Ni sin?i=nrsin?r
?IE= - W (work)
The incident angle at which total internal reflection occurs (use ?r=90°)


33. Voltage formula (think units of volts are what?) (NOT in terms of I and R)
Voltage=PE/q (remember Joules/Coulomb= volt)
Vfinal= V0 +at
N= C/velocity.
The incident angle at which total internal reflection occurs (use ?r=90°)


34. Formula for diffraction pattern - Anti-node to node (A-N)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
(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)
1.6*10?¹? C
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)


35. Light intensity is proportional to..
Ebinding= ?m * c² (= (?m)c²)
Intensity a Amplitude/ d²
Longer ? - larger diffraction - smaller shadow.
F=GM1M2/r²


36. Centripetal acceleration formula
KE= (Y-1)mc² (= (Y-1)E)
931MeV=1amu
A=v²/ r
Momentum is always conserved in the absence of an outside force


37. ß? decay?
Ebinding= ?m * c² (= (?m)c²)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted


38. (Full/Final) Velocity formula
Vfinal= V0 +at
P=mv (?p=m?v)
1.6*10?¹? C
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).


39. Energy of an emitted photon formula?
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Negative - focus behind the lens (= virtual image)
Distance= velocity * time
Eff= 1- Qc/Qh = 1- Tc/Th


40. Torque formula
PE=mgh
Longer ? - larger diffraction - smaller shadow.
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Threshold frequency=F/h (= work functions/planck's constant)


41. Graviational force formula
F=mv²/ r
1.67*10?²7kg
F=GM1M2/r²
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage


42. Formula for diffraction pattern - Anti-node to Anti-node (A-A)
(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= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
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)
F=GM1M2/r²


43. Apparent weight (weight of submerged object)
E= kq/r² (= f/q)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
1.6*10?¹? C


44. Law of refraction
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Ni sin?i=nrsin?r
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.


45. Transformer formula

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46. Converting Fahrenheit to Celsius
F= (9/5)C+ 32
V=f?
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)


47. Gravitational constant
KE= (Y-1)mc² (= (Y-1)E)
Etotal= E rest + KE= mc² + (Y-1)mc²
Q=mc?T (where T is temperature)
G= 6.67 * 10?¹¹ Nm²/kg²


48. Formula for resistance of an OBJECT
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Y= 1/ v(1-(v/c)²)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)


49. K constant for electric field formula?
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
K= 9 * 10? Nm²/C²


50. Lenz's law
Q=m*L (where L is the latent heat of fusion or vaporization)
(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)
Induced current will flow opposite direction of magnetic flux.
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)