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. High frequency wave shave...
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Low
Shorter ? - less diffraction - bigger shadow.


2. Activity of a radioactive sample formula? (probably don't have to know)
Q=mc?T (where T is temperature)
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)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Etotal= E rest + KE= mc² + (Y-1)mc²


3. Work formula
E0= 8.85 * 10?¹² C²/(Nm²)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)


4. Heat formula
E= kq/r² (= f/q)
1.6*10?¹? C
Q=mc?T (where T is temperature)
?= 4L + 1.6d


5. ONE END CAPPED PIPE FREQUENCY (Frequency/Harmonic series of a pipe closed at one ned)
V= 331 m/s + (.6 m/s°C)Temperature
Felec=qE=[kq1q2]/r²
P=IV=I²R=V² /R = Fd/t= Force*velocity
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)


6. Conservation of momentum
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Zero.
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Momentum is always conserved in the absence of an outside force


7. Moment of Inertia (a.k.a. rotational mass)
Vfinal= V0 +at
?p=f?t (where f is AVERAGE force and t is how long force is applied)
I=mr²
C= 3*108 m/s


8. Formula for resistance of an OBJECT
Length stationary=Length moving/Y
1/f= 1/di + 1/do
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)


9. What is the photoelectric effect?
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Fnet=ma


10. Formula for electric potential energy?
Distance= velocity * time
For every action there is an equal and opposite reaction
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)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V


11. Relativistic factor Y formula
1/f= 1/di + 1/do
W=qVoltage. (think C* J/C and C's cancel out)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Y= 1/ v(1-(v/c)²)


12. speed of light
C= 3*108 m/s
P=mv (?p=m?v)
K= 9 * 10? Nm²/C²
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage


13. deBrolglie wavelength formula

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14. Potential Energy formula
PE=mgh
Ni sin?i=nrsin?r
V=f?
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)


15. Formula for energy of a photon?

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16. Light intensity is proportional to..
Intensity a Amplitude/ d²
Zero.
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Vfinal²=V0²+ 2ad


17. Faraday's law
M= -di/do (=-hi/ho)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
For every action there is an equal and opposite reaction
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)


18. Graviational force formula
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
F=GM1M2/r²
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
M= -di/do (=-hi/ho)


19. Voltage formula (for circuit - etc.)
Negative - focus behind the lens (= virtual image)
For every action there is an equal and opposite reaction
931MeV=1amu
V=IR


20. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
Intensity a Amplitude/ d²
?= 4L + 1.6d
KE= (Y-1)mc² (= (Y-1)E)
Induced current will flow opposite direction of magnetic flux.


21. If you drop an object into water the volume displaced equals...
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
1.6*10?¹? C
Induced current will flow opposite direction of magnetic flux.
The volume of the object.


22. Momentum formula?
Large/high
Eff= 1- Qc/Qh = 1- Tc/Th
Distance= velocity * time
P=mv (?p=m?v)


23. Lenz's law
Q=m*L (where L is the latent heat of fusion or vaporization)
Beat frequency= |F1-F2|
Large/high
Induced current will flow opposite direction of magnetic flux.


24. Work function F is..?
Positive - focus in front of the lens (=real image)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Product of each lens's magnification
E= kq/r² (= f/q)


25. Capacitance formula? (there are two)
C= Q/V = e0 *A/d
Felec=qE=[kq1q2]/r²
V=IR
V=f?


26. How to find total magnification?

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27. energy in a reaction q formula?
K= 9 * 10? Nm²/C²
C= Q/V = e0 *A/d
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Felec=qE=[kq1q2]/r²


28. Relativistic formula for velocity
Q=mc?T (where T is temperature)
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)
PE=mgh
The volume of the object.


29. Energy of an emitted photon formula?
Ebinding= ?m * c² (= (?m)c²)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
K= 9 * 10? Nm²/C²


30. Binding energy explanation
?p=f?t (where f is AVERAGE force and t is how long force is applied)
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)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)


31. K constant for electric field formula?
The incident angle at which total internal reflection occurs (use ?r=90°)
Voltage=PE/q (remember Joules/Coulomb= volt)
K= 9 * 10? Nm²/C²
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration


32. Elastic potential energy for a spring formula
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
?= 4L + 1.6d
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)


33. Impulse formula
?p=f?t (where f is AVERAGE force and t is how long force is applied)
E= V/d
Q=m*L (where L is the latent heat of fusion or vaporization)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)


34. Gravitational constant
M= -di/do (=-hi/ho)
E= V/d
G= 6.67 * 10?¹¹ Nm²/kg²
W= - kq1q2 (1/r2 - 1/r1)


35. Critical angle is...
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
P=IV=I²R=V² /R = Fd/t= Force*velocity
The incident angle at which total internal reflection occurs (use ?r=90°)
Vfinal= V0 +at


36. (Full) Displacement formula
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
1.67*10?²7kg
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
E= kq/r² (= f/q)


37. Ideal gas law
KEmax= hf-F (= E-F= Energy of a photon - work function)
F=GM1M2/r²
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)


38. New/old gas formula?

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39. Binding energy formula
Length stationary=Length moving/Y
Momentum is always conserved in the absence of an outside force
Vfinal= V0 +at
Ebinding= ?m * c² (= (?m)c²)


40. Threshold frequency formula?

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41. deBroglie wavelength explanation
Q=m*L (where L is the latent heat of fusion or vaporization)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
N= C/velocity.
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)


42. Electric field between two plates formula?
E= V/d
Large/high
(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)
E= kq/r² (= f/q)


43. mass of a proton/neutron (there's a slight difference but ignore it - neutron has slightly more mass)
Large/high
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
1.67*10?²7kg


44. Planck's constant in electronvolts* seconds?
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
M= -di/do (=-hi/ho)
4.14 10?¹5 eVs
The volume of the object.


45. Converting Fahrenheit to Celsius
E0= 8.85 * 10?¹² C²/(Nm²)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
F= (9/5)C+ 32
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)


46. Work performed by charge displacement? (hopefully...won't have to know)
Induced current will flow opposite direction of magnetic flux.
E0= 8.85 * 10?¹² C²/(Nm²)
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)
W= - kq1q2 (1/r2 - 1/r1)


47. Kinetic Energy formula
V= 331 m/s + (.6 m/s°C)Temperature
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Distance= velocity * time
KE=1/2mv²


48. Formula for how velocity changes in air? (probably don't have to know)
V= 331 m/s + (.6 m/s°C)Temperature
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)


49. Efficiency of an engine formula
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Eff= 1- Qc/Qh = 1- Tc/Th
6.6310 ?³4 Js
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)


50. Formula for diffraction pattern - Anti-node to node (A-N)
W=qVoltage. (think C* J/C and C's cancel out)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
(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)
Vfinal= V0 +at