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. Light intensity is proportional to..
Vfinal²=V0²+ 2ad
Intensity a Amplitude/ d²
C= 3*108 m/s
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)


2. Efficiency of an engine formula
Eff= 1- Qc/Qh = 1- Tc/Th
C= Q/V = e0 *A/d
?= 4L + 1.6d
Positive - focus in front of the lens (=real image)


3. Work formula
Fnet=ma
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
4.14 10?¹5 eVs
Ebinding= ?m * c² (= (?m)c²)


4. Voltage formula (for circuit - etc.)
Longer ? - larger diffraction - smaller shadow.
Zero.
?IE= - W (work)
V=IR


5. Lenz's law
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)
V= 331 m/s + (.6 m/s°C)Temperature
Induced current will flow opposite direction of magnetic flux.
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)


6. Faraday's law
Y= 1/ v(1-(v/c)²)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
PE=mgh
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)


7. deBrolglie wavelength formula

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8. Formula for magnetic flux?
931MeV=1amu
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Ebinding= ?m * c² (= (?m)c²)
Vfinal= V0 +at


9. Mass defect explanation

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10. Planck's constant in J*s?
Eff= 1- Qc/Qh = 1- Tc/Th
?IE= - W (work)
6.6310 ?³4 Js
V=IR


11. Relativistic formula for velocity
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)
E= V/d
V= 331 m/s + (.6 m/s°C)Temperature
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)


12. Transformer formula

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13. What is the apparent weight of a floating object?
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Zero.


14. Conversion factor from atomic mass units to MeV?
E0= 8.85 * 10?¹² C²/(Nm²)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
931MeV=1amu


15. New/old gas formula?

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16. Capacitance formula? (there are two)
C= Q/V = e0 *A/d
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)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)


17. Relativistic factor Y formula
The incident angle at which total internal reflection occurs (use ?r=90°)
G= 6.67 * 10?¹¹ Nm²/kg²
Y= 1/ v(1-(v/c)²)
For every action there is an equal and opposite reaction


18. Formula for how velocity changes in air? (probably don't have to know)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
KE=1/2mv²
V= 331 m/s + (.6 m/s°C)Temperature
1.6*10?¹? C


19. Formula for velocity of waves?
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Low
V=f?


20. Critical angle is...
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)
Longer ? - larger diffraction - smaller shadow.
The incident angle at which total internal reflection occurs (use ?r=90°)
Y= 1/ v(1-(v/c)²)


21. Centripetal force formula
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Threshold frequency=F/h (= work functions/planck's constant)
F=mv²/ r
P=IV=I²R=V² /R = Fd/t= Force*velocity


22. Relativistic formula for length
Length stationary=Length moving/Y
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)


23. If you drop an object into water the volume displaced equals...
V=f?
The volume of the object.
Q=m*L (where L is the latent heat of fusion or vaporization)
F=mv²/ r


24. Beat frequency
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Beat frequency= |F1-F2|
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Intensity a Amplitude/ d²


25. Sign of focus for concave lens?
Q=mc?T (where T is temperature)
Positive - focus in front of the lens (=real image)
Eff= 1- Qc/Qh = 1- Tc/Th
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)


26. K constant for electric field formula?
1.67*10?²7kg
F=GM1M2/r²
K= 9 * 10? Nm²/C²
Vfinal²=V0²+ 2ad


27. deBroglie wavelength explanation
6.6310 ?³4 Js
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
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)


28. speed of light
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
C= 3*108 m/s
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)
E= kq/r² (= f/q)


29. Formula for resistance of an OBJECT
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
?= 4L + 1.6d
A=v²/ r
KE=1/2mv²


30. Activity of a radioactive sample formula? (probably don't have to know)
M= -di/do (=-hi/ho)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
4.14 10?¹5 eVs
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)


31. What is the photoelectric effect?
?p=f?t (where f is AVERAGE force and t is how long force is applied)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
KE= (Y-1)mc² (= (Y-1)E)
F=ILBsin? (?= angle btw. L and B)


32. Impulse formula
?p=f?t (where f is AVERAGE force and t is how long force is applied)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
P=mv (?p=m?v)
F=ILBsin? (?= angle btw. L and B)


33. Law of reflection
Angle of incidence=Angle of reflection
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)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
I=mr²


34. Internal energy....equals?
?IE= - W (work)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Beat frequency= |F1-F2|
E0= 8.85 * 10?¹² C²/(Nm²)


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

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36. Low frequency waves have...
A=v²/ r
Longer ? - larger diffraction - smaller shadow.
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
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)


37. Kinetic Energy formula
Momentum is always conserved in the absence of an outside force
PE=mgh
KE=1/2mv²
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)


38. Formula for electric field?
F=ILBsin? (?= angle btw. L and B)
E= kq/r² (= f/q)
Length stationary=Length moving/Y
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)


39. (Full) Displacement formula
Angle of incidence=Angle of reflection
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Distance= velocity * time
?Tstationary= Y (?Tmoving)


40. Binding energy formula
Threshold frequency=F/h (= work functions/planck's constant)
Ebinding= ?m * c² (= (?m)c²)
Length stationary=Length moving/Y
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)


41. Apparent weight (weight of submerged object)
1.67*10?²7kg
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Angle of incidence=Angle of reflection
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)


42. Thin lens equation
Beat frequency= |F1-F2|
1/f= 1/di + 1/do
The volume of the object.
F=mv²/ r


43. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
The incident angle at which total internal reflection occurs (use ?r=90°)
?= 4L + 1.6d
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)


44. Planck's constant in electronvolts* seconds?
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
4.14 10?¹5 eVs
Distance= velocity * time
Q=m*L (where L is the latent heat of fusion or vaporization)


45. Formula for diffraction pattern - Anti-node to node (A-N)
V=f?
(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)
Shorter ? - less diffraction - bigger shadow.
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.


46. Total KE formula
Etotal= E rest + KE= mc² + (Y-1)mc²
Length stationary=Length moving/Y
Eff= 1- Qc/Qh = 1- Tc/Th
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)


47. ONE END CAPPED PIPE FREQUENCY (Frequency/Harmonic series of a pipe closed at one ned)
Induced current will flow opposite direction of magnetic flux.
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Voltage=PE/q (remember Joules/Coulomb= volt)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)


48. Binding energy explanation
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Etotal= E rest + KE= mc² + (Y-1)mc²
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)


49. Converting Fahrenheit to Celsius
F= (9/5)C+ 32
Shorter ? - less diffraction - bigger shadow.
4.14 10?¹5 eVs
M= -di/do (=-hi/ho)


50. Right-hand rule
E0= 8.85 * 10?¹² C²/(Nm²)
Etotal= E rest + KE= mc² + (Y-1)mc²
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.