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. Sign of focus for convex lens?
Zero.
Threshold frequency=F/h (= work functions/planck's constant)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
Negative - focus behind the lens (= virtual image)


2. If speed is slow/low - index of refraction is...
A=v²/ r
E= kq/r² (= f/q)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Large/high


3. What is the photoelectric effect?
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
(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)
K= 9 * 10? Nm²/C²
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)


4. Binding energy explanation
Low
F= (9/5)C+ 32
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
F=ILBsin? (?= angle btw. L and B)


5. Distance formula?
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
N= C/velocity.
Distance= velocity * time
KE=1/2mv²


6. Magnification equation
E= kq/r² (= f/q)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
M= -di/do (=-hi/ho)


7. Efficiency of an engine formula
Distance= velocity * time
Eff= 1- Qc/Qh = 1- Tc/Th
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
The volume of the object.


8. deBrolglie wavelength formula

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9. speed of light
Negative - focus behind the lens (= virtual image)
C= 3*108 m/s
Intensity a Amplitude/ d²
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)


10. Newton's second law
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Fb= mass of displaced fluid * gravity
Vfinal= V0 +at
Fnet=ma


11. Formula for how velocity changes in air? (probably don't have to know)
Ebinding= ?m * c² (= (?m)c²)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
F=GM1M2/r²
V= 331 m/s + (.6 m/s°C)Temperature


12. Heat of fusion/vaporization fromula
Q=m*L (where L is the latent heat of fusion or vaporization)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
The incident angle at which total internal reflection occurs (use ?r=90°)
1/f= 1/di + 1/do


13. mass of a proton/neutron (there's a slight difference but ignore it - neutron has slightly more mass)
1.67*10?²7kg
Felec=qE=[kq1q2]/r²
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Fb= mass of displaced fluid * gravity


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

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15. New/old gas formula?

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16. Magnetic force formula (for wire)?
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
E= V/d
F=ILBsin? (?= angle btw. L and B)


17. Kinetic Energy formula
KE=1/2mv²
Beat frequency= |F1-F2|
Threshold frequency=F/h (= work functions/planck's constant)
Length stationary=Length moving/Y


18. Formula for electric potential energy?
1/f= 1/di + 1/do
V=IR
Shorter ? - less diffraction - bigger shadow.
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V


19. Formula for diffraction pattern - Anti-node to Anti-node (A-A)
E0= 8.85 * 10?¹² C²/(Nm²)
931MeV=1amu
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)
Vfinal²=V0²+ 2ad


20. Formula for magnetic flux?
Negative - focus behind the lens (= virtual image)
Longer ? - larger diffraction - smaller shadow.
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Eff= 1- Qc/Qh = 1- Tc/Th


21. Graviational force formula
F= (9/5)C+ 32
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
F=GM1M2/r²
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)


22. Electric field between two plates formula?
V=IR
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
F=mv²/ r
E= V/d


23. What is the apparent weight of a floating object?
Voltage=PE/q (remember Joules/Coulomb= volt)
Zero.
For every action there is an equal and opposite reaction
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)


24. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
Y= 1/ v(1-(v/c)²)
?= 4L + 1.6d
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
Negative - focus behind the lens (= virtual image)


25. Index of refraction formula
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
N= C/velocity.
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Beat frequency= |F1-F2|


26. OPEN PIPE FREQUENCY (Frequency/Harmonic series of a pipe opened at both ends)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Etotal= E rest + KE= mc² + (Y-1)mc²
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)
Beat frequency= |F1-F2|


27. Newton's third law
For every action there is an equal and opposite reaction
A=v²/ r
G= 6.67 * 10?¹¹ Nm²/kg²
The volume of the object.


28. Total KE formula
E= V/d
W= - kq1q2 (1/r2 - 1/r1)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Etotal= E rest + KE= mc² + (Y-1)mc²


29. K constant for electric field formula?
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
K= 9 * 10? Nm²/C²
Momentum is always conserved in the absence of an outside force
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)


30. Relativistic formula for length
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Length stationary=Length moving/Y
Threshold frequency=F/h (= work functions/planck's constant)
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)


31. Gravitational constant
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)
G= 6.67 * 10?¹¹ Nm²/kg²
V=f?
1/f= 1/di + 1/do


32. Electron capture
F=mv²/ r
Fb= mass of displaced fluid * gravity
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Angle of incidence=Angle of reflection


33. Moment of Inertia (a.k.a. rotational mass)
Etotal= E rest + KE= mc² + (Y-1)mc²
I=mr²
1/f= 1/di + 1/do
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.


34. Relativistic factor Y formula
V= 331 m/s + (.6 m/s°C)Temperature
Y= 1/ v(1-(v/c)²)
A=v²/ r
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)


35. Ideal gas law
Longer ? - larger diffraction - smaller shadow.
1/f= 1/di + 1/do
I=mr²
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)


36. Momentum formula?
P=mv (?p=m?v)
Length stationary=Length moving/Y
Negative - focus behind the lens (= virtual image)
?Tstationary= Y (?Tmoving)


37. deBroglie wavelength explanation
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Distance= velocity * time
P=mv (?p=m?v)
E= kq/r² (= f/q)


38. Torque formula
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Fnet=ma
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Negative - focus behind the lens (= virtual image)


39. Formula for resistance of an OBJECT
V= 331 m/s + (.6 m/s°C)Temperature
Large/high
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
E= kq/r² (= f/q)


40. Buoyant force formula
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Fb= mass of displaced fluid * gravity
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)


41. Faraday's law
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)


42. Relativistic formula for (kinetic) energy
Shorter ? - less diffraction - bigger shadow.
KE= (Y-1)mc² (= (Y-1)E)
Voltage=PE/q (remember Joules/Coulomb= volt)
V= 331 m/s + (.6 m/s°C)Temperature


43. Formula for velocity of waves?
N= C/velocity.
E= V/d
V=f?
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)


44. Formula for energy of a photon?

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45. Heat formula
Q=mc?T (where T is temperature)
1.6*10?¹? C
KE= (Y-1)mc² (= (Y-1)E)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)


46. How to find total magnification?

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47. Mass defect explanation

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48. Velocity formula if time not given
6.6310 ?³4 Js
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
F=ILBsin? (?= angle btw. L and B)
Vfinal²=V0²+ 2ad


49. Threshold frequency explanation?
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Ebinding= ?m * c² (= (?m)c²)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
F=ILBsin? (?= angle btw. L and B)


50. If you drop an object into water the volume displaced equals...
E= V/d
Zero.
The volume of the object.
F=mv²/ r