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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. Beat frequency
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Ni sin?i=nrsin?r
Beat frequency= |F1-F2|
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

2. Formula for energy levels within any atom?

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3. Magnetic force formula (for wire)?
6.6310 ?³4 Js
?IE= - W (work)
Distance= velocity * time
F=ILBsin? (?= angle btw. L and B)

4. Internal energy....equals?
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Beat frequency= |F1-F2|
C= 3*108 m/s
?IE= - W (work)

5. Velocity formula if time not given
Vfinal²=V0²+ 2ad
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Longer ? - larger diffraction - smaller shadow.
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)

6. Total KE formula
Etotal= E rest + KE= mc² + (Y-1)mc²
Zero.
Shorter ? - less diffraction - bigger shadow.
1.6*10?¹? C

7. If you drop an object into water the volume displaced equals...
P=mv (?p=m?v)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
The volume of the object.
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)

8. If speed is high - index of refraction is....
Low
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
KE= (Y-1)mc² (= (Y-1)E)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)

9. Faraday's law
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Beat frequency= |F1-F2|
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Momentum is always conserved in the absence of an outside force

10. (Full) Displacement formula
931MeV=1amu
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)

11. Magnification equation
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Ni sin?i=nrsin?r
M= -di/do (=-hi/ho)
The incident angle at which total internal reflection occurs (use ?r=90°)

12. Work formula
K= 9 * 10? Nm²/C²
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Low

13. Critical angle is...
Negative - focus behind the lens (= virtual image)
Ebinding= ?m * c² (= (?m)c²)
C= Q/V = e0 *A/d
The incident angle at which total internal reflection occurs (use ?r=90°)

14. Centripetal force formula
?p=f?t (where f is AVERAGE force and t is how long force is applied)
F=mv²/ r
Product of each lens's magnification
F=GM1M2/r²

15. Distance formula?
Distance= velocity * time
K= 9 * 10? Nm²/C²
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
F= (9/5)C+ 32

16. Binding energy explanation
K= 9 * 10? Nm²/C²
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
The volume of the object.

17. Formula for energy of a photon?

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18. Centripetal acceleration formula
W=qVoltage. (think C* J/C and C's cancel out)
Q=m*L (where L is the latent heat of fusion or vaporization)
PE=mgh
A=v²/ r

19. Buoyant force formula
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Q=mc?T (where T is temperature)
Fb= mass of displaced fluid * gravity
V=f?

20. Formula for diffraction pattern - Anti-node to Anti-node (A-A)
C= Q/V = e0 *A/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)
W= - kq1q2 (1/r2 - 1/r1)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

21. Formula for electric field?
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
E= kq/r² (= f/q)
F=GM1M2/r²
For every action there is an equal and opposite reaction

22. Graviational force formula
Momentum is always conserved in the absence of an outside force
K= 9 * 10? Nm²/C²
F=GM1M2/r²
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)

23. Maximum KE with which an emitted electron leaves is...?
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
KEmax= hf-F (= E-F= Energy of a photon - work function)

24. Conversion factor from atomic mass units to MeV?
PE=mgh
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
C= Q/V = e0 *A/d
931MeV=1amu

25. Formula for magnetic flux?
Etotal= E rest + KE= mc² + (Y-1)mc²
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
For every action there is an equal and opposite reaction
V=IR

26. Planck's constant in J*s?
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
KE= (Y-1)mc² (= (Y-1)E)
E= V/d
6.6310 ?³4 Js

27. Formula for velocity of waves?
?= 4L + 1.6d
F=mv²/ r
1/f= 1/di + 1/do
V=f?

28. What is the photoelectric effect?
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
Induced current will flow opposite direction of magnetic flux.
V=IR
6.6310 ?³4 Js

29. Electron capture
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Ebinding= ?m * c² (= (?m)c²)
Vfinal²=V0²+ 2ad

30. Light intensity is proportional to..
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
Intensity a Amplitude/ d²

31. Voltage formula (for circuit - etc.)
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= kq/r² (= f/q)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
V=IR

32. Energy of an emitted photon formula?
PE=mgh
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
F=GM1M2/r²
Low

33. Heat of fusion/vaporization fromula
1.6*10?¹? C
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Q=m*L (where L is the latent heat of fusion or vaporization)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)

34. 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)
Product of each lens's magnification
6.6310 ?³4 Js
E0= 8.85 * 10?¹² C²/(Nm²)

35. Newton's first law (Law of...)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
P=IV=I²R=V² /R = Fd/t= Force*velocity
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

36. Capacitance constant
E0= 8.85 * 10?¹² C²/(Nm²)
Fb= mass of displaced fluid * gravity
Fnet=ma
F=ILBsin? (?= angle btw. L and B)

37. Formula for electric potential energy?
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Intensity a Amplitude/ d²
Large/high
Voltage=PE/q (remember Joules/Coulomb= volt)

38. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
?= 4L + 1.6d
6.6310 ?³4 Js
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)
The incident angle at which total internal reflection occurs (use ?r=90°)

39. Apparent weight (weight of submerged object)
The incident angle at which total internal reflection occurs (use ?r=90°)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Longer ? - larger diffraction - smaller shadow.
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)

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

41. Relativistic formula for (kinetic) energy
P=IV=I²R=V² /R = Fd/t= Force*velocity
P=mv (?p=m?v)
KE= (Y-1)mc² (= (Y-1)E)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).

42. Thin lens equation
M= -di/do (=-hi/ho)
Length stationary=Length moving/Y
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
1/f= 1/di + 1/do

43. deBrolglie wavelength formula

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44. High frequency wave shave...
1.6*10?¹? C
Ni sin?i=nrsin?r
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Shorter ? - less diffraction - bigger shadow.

45. Torque formula
Length stationary=Length moving/Y
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
I=mr²
E= kq/r² (= f/q)

46. Sign of focus for convex lens?
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
Negative - focus behind the lens (= virtual image)
K= 9 * 10? Nm²/C²
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

47. Ideal gas law
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Voltage=PE/q (remember Joules/Coulomb= volt)
Q=mc?T (where T is temperature)

48. speed of light
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)
E0= 8.85 * 10?¹² C²/(Nm²)
C= 3*108 m/s
Vfinal= V0 +at

49. deBroglie wavelength explanation
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
M= -di/do (=-hi/ho)
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)

50. Electric field between two plates formula?
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
E= V/d
Voltage=PE/q (remember Joules/Coulomb= volt)
(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)