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SAT Subject Test: Physics Formulas

Instructions:

Answer 50 questions in 15 minutes.
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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. Formula for electric potential energy?
W=qVoltage. (think C* J/C and C's cancel out)
Shorter ? - less diffraction - bigger shadow.
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Negative - focus behind the lens (= virtual image)

2. Gravitational constant
The incident angle at which total internal reflection occurs (use ?r=90°)
G= 6.67 * 10?¹¹ Nm²/kg²
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)

3. Mass defect explanation

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4. Graviational force formula
F=GM1M2/r²
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
PE=mgh

5. Formula for energy levels within any atom?

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6. Capacitance formula? (there are two)
Length stationary=Length moving/Y
6.6310 ?³4 Js
V=IR
C= Q/V = e0 *A/d

7. Power formula?
?Tstationary= Y (?Tmoving)
V=f?
F=mv²/ r
P=IV=I²R=V² /R = Fd/t= Force*velocity

8. Energy of an emitted photon formula?
KEmax= hf-F (= E-F= Energy of a photon - work function)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Momentum is always conserved in the absence of an outside force
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)

9. Heat formula
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
A=v²/ r
I=mr²
Q=mc?T (where T is temperature)

10. Relativistic formula for (kinetic) energy
Induced current will flow opposite direction of magnetic flux.
Length stationary=Length moving/Y
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
KE= (Y-1)mc² (= (Y-1)E)

11. Work formula
Low
P=IV=I²R=V² /R = Fd/t= Force*velocity
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Y= 1/ v(1-(v/c)²)

12. Low frequency waves have...
Large/high
6.6310 ?³4 Js
Longer ? - larger diffraction - smaller shadow.
A=v²/ r

13. Impulse formula
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Positive - focus in front of the lens (=real image)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)

14. Thin lens equation
1/f= 1/di + 1/do
?Tstationary= Y (?Tmoving)
Intensity a Amplitude/ d²
PE=mgh

15. High frequency wave shave...
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
Length stationary=Length moving/Y
Voltage=PE/q (remember Joules/Coulomb= volt)
Shorter ? - less diffraction - bigger shadow.

16. magnitude of charge on electron/proton
1.6*10?¹? C
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
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)

17. Work function F is..?
Ebinding= ?m * c² (= (?m)c²)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Eff= 1- Qc/Qh = 1- Tc/Th
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

18. If you drop an object into water the volume displaced equals...
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
The volume of the object.
V=IR
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

19. Newton's third law
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Felec=qE=[kq1q2]/r²
For every action there is an equal and opposite reaction

20. What is the photoelectric effect?
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
Product of each lens's magnification
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
G= 6.67 * 10?¹¹ Nm²/kg²

21. deBroglie wavelength explanation
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Fb= mass of displaced fluid * gravity

22. Magnification equation
M= -di/do (=-hi/ho)
Intensity a Amplitude/ d²
Ni sin?i=nrsin?r
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)

23. Formula for diffraction pattern - Anti-node to node (A-N)
The volume of the object.
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
(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)
Y= 1/ v(1-(v/c)²)

24. Light intensity is proportional to..
Intensity a Amplitude/ d²
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
KE=1/2mv²
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

25. Moment of Inertia (a.k.a. rotational mass)
4.14 10?¹5 eVs
I=mr²
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

26. Sign of focus for concave lens?
Positive - focus in front of the lens (=real image)
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)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Etotal= E rest + KE= mc² + (Y-1)mc²

27. energy in a reaction q formula?
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
E0= 8.85 * 10?¹² C²/(Nm²)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
?Tstationary= Y (?Tmoving)

28. Right-hand rule
F=ILBsin? (?= angle btw. L and B)
W= - kq1q2 (1/r2 - 1/r1)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.

29. Ideal gas law
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
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)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
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)

30. ß? decay?
P=IV=I²R=V² /R = Fd/t= Force*velocity
Threshold frequency=F/h (= work functions/planck's constant)
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)

31. Planck's constant in electronvolts* seconds?
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
4.14 10?¹5 eVs
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)

32. Electron capture
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Negative - focus behind the lens (= virtual image)
Voltage=PE/q (remember Joules/Coulomb= volt)
V=IR

33. 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)
Y= 1/ v(1-(v/c)²)
V=f?
The volume of the object.

34. Beat frequency
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Beat frequency= |F1-F2|
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
W= - kq1q2 (1/r2 - 1/r1)

35. Law of reflection
Angle of incidence=Angle of reflection
M= -di/do (=-hi/ho)
W=qVoltage. (think C* J/C and C's cancel out)
KEmax= hf-F (= E-F= Energy of a photon - work function)

36. Binding energy formula
Ebinding= ?m * c² (= (?m)c²)
Length stationary=Length moving/Y
For every action there is an equal and opposite reaction
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)

37. Planck's constant in J*s?
Negative - focus behind the lens (= virtual image)
6.6310 ?³4 Js
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

38. Momentum formula?
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Induced current will flow opposite direction of magnetic flux.
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
P=mv (?p=m?v)

39. Work performed by charge displacement? (hopefully...won't have to know)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Beat frequency= |F1-F2|
W= - kq1q2 (1/r2 - 1/r1)
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)

40. Centripetal force formula
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
F=mv²/ r
I=mr²
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)

41. Formula for electric field?
E= kq/r² (= f/q)
PE=mgh
F= (9/5)C+ 32
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)

42. Converting Fahrenheit to Celsius
E= kq/r² (= f/q)
F= (9/5)C+ 32
KE= (Y-1)mc² (= (Y-1)E)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)

43. Torque formula
Length stationary=Length moving/Y
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
(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)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration

44. ß? decay?
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
V= 331 m/s + (.6 m/s°C)Temperature
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Ebinding= ?m * c² (= (?m)c²)

45. Total KE formula
Positive - focus in front of the lens (=real image)
E= kq/r² (= f/q)
Etotal= E rest + KE= mc² + (Y-1)mc²
PE=mgh

46. Electric force formula? (two)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
V=IR
Felec=qE=[kq1q2]/r²
Etotal= E rest + KE= mc² + (Y-1)mc²

47. Threshold frequency formula?

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48. Lenz's law
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
Length stationary=Length moving/Y
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
Induced current will flow opposite direction of magnetic flux.

49. Internal energy....equals?
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Large/high
?IE= - W (work)
Intensity a Amplitude/ d²

50. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
(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)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
?= 4L + 1.6d
F=ILBsin? (?= angle btw. L and B)