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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.
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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. energy in a reaction q formula?
?= 4L + 1.6d
F=mv²/ r
931MeV=1amu
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)

2. Apparent weight (weight of submerged object)
V=f?
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
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)

3. deBroglie wavelength explanation
Large/high
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Beat frequency= |F1-F2|
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)

4. Threshold frequency formula?

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5. What is the photoelectric effect?
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
1/f= 1/di + 1/do

6. Planck's constant in J*s?
F=GM1M2/r²
Threshold frequency=F/h (= work functions/planck's constant)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
6.6310 ?³4 Js

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

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8. ß? decay?
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
W=qVoltage. (think C* J/C and C's cancel out)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)

9. Momentum formula?
Ebinding= ?m * c² (= (?m)c²)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
P=mv (?p=m?v)

10. Relativistic formula for velocity
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
?p=f?t (where f is AVERAGE force and t is how long force is applied)
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)

11. (Full) Displacement formula
I=mr²
Fnet=ma
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

12. Total KE formula
P=IV=I²R=V² /R = Fd/t= Force*velocity
Etotal= E rest + KE= mc² + (Y-1)mc²
Length stationary=Length moving/Y
M= -di/do (=-hi/ho)

13. Light intensity is proportional to..
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Intensity a Amplitude/ d²
Fnet=ma
Zero.

14. Formula for electric field?
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
1.6*10?¹? C
E= kq/r² (= f/q)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)

15. deBrolglie wavelength formula

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16. Velocity formula if time not given
Ebinding= ?m * c² (= (?m)c²)
Vfinal²=V0²+ 2ad
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
PE=mgh

17. Centripetal force formula
F=mv²/ r
Etotal= E rest + KE= mc² + (Y-1)mc²
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
C= Q/V = e0 *A/d

18. Heat formula
K= 9 * 10? Nm²/C²
Q=mc?T (where T is temperature)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)

19. Beat frequency
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
1/f= 1/di + 1/do
Beat frequency= |F1-F2|
C= Q/V = e0 *A/d

20. Right-hand rule
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
N= C/velocity.
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
V=f?

21. Internal energy....equals?
?IE= - W (work)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
V=f?

22. Capacitance formula? (there are two)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
C= Q/V = e0 *A/d
?= 4L + 1.6d
Angle of incidence=Angle of reflection

23. Torque formula
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Vfinal²=V0²+ 2ad
Felec=qE=[kq1q2]/r²
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)

24. Electric field between two plates formula?
E= V/d
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)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)

25. (Full/Final) Velocity formula
Threshold frequency=F/h (= work functions/planck's constant)
Vfinal= V0 +at
K= 9 * 10? Nm²/C²
Fnet=ma

26. Heat of fusion/vaporization fromula
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
Q=m*L (where L is the latent heat of fusion or vaporization)
Induced current will flow opposite direction of magnetic flux.
4.14 10?¹5 eVs

27. Thin lens equation
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
1/f= 1/di + 1/do
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)

28. Formula for electric potential energy?
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Felec=qE=[kq1q2]/r²
KE= (Y-1)mc² (= (Y-1)E)
?p=f?t (where f is AVERAGE force and t is how long force is applied)

29. Impulse formula
E=hf (= Planck's constant*frequency)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)

30. Energy of an emitted photon formula?
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Length stationary=Length moving/Y
G= 6.67 * 10?¹¹ Nm²/kg²
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration

31. Activity of a radioactive sample formula? (probably don't have to know)
KE= (Y-1)mc² (= (Y-1)E)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
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)
W=qVoltage. (think C* J/C and C's cancel out)

32. Newton's third law
For every action there is an equal and opposite reaction
E= V/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)
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)

33. magnitude of charge on electron/proton
Ebinding= ?m * c² (= (?m)c²)
1.6*10?¹? C
4.14 10?¹5 eVs
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

34. What is the apparent weight of a floating object?
Zero.
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
V=f?
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted

35. Conservation of momentum
Fb= mass of displaced fluid * gravity
P=IV=I²R=V² /R = Fd/t= Force*velocity
Product of each lens's magnification
Momentum is always conserved in the absence of an outside force

36. ONE END CAPPED PIPE FREQUENCY (Frequency/Harmonic series of a pipe closed at one ned)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
The incident angle at which total internal reflection occurs (use ?r=90°)

37. Binding energy formula
Distance= velocity * time
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Ebinding= ?m * c² (= (?m)c²)

38. Relativistic formula for time
E= V/d
Length stationary=Length moving/Y
Ni sin?i=nrsin?r
?Tstationary= Y (?Tmoving)

39. Planck's constant in electronvolts* seconds?
P=mv (?p=m?v)
4.14 10?¹5 eVs
E0= 8.85 * 10?¹² C²/(Nm²)
Positive - focus in front of the lens (=real image)

40. Formula for velocity of waves?
?Tstationary= Y (?Tmoving)
KEmax= hf-F (= E-F= Energy of a photon - work function)
V=f?
F=ILBsin? (?= angle btw. L and B)

41. ß? decay?
M= -di/do (=-hi/ho)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Low

42. Formula for diffraction pattern - Anti-node to Anti-node (A-A)
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)
Ni sin?i=nrsin?r
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
?= 4L + 1.6d

43. Kinetic Energy formula
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
Beat frequency= |F1-F2|
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
KE=1/2mv²

44. Sign of focus for concave lens?
W= - kq1q2 (1/r2 - 1/r1)
Positive - focus in front of the lens (=real image)
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)

45. Mass defect explanation

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46. Formula for magnetic flux?
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
6.6310 ?³4 Js
E= kq/r² (= f/q)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)

47. Work formula
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
KEmax= hf-F (= E-F= Energy of a photon - work function)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Angle of incidence=Angle of reflection

48. Moment of Inertia (a.k.a. rotational mass)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Shorter ? - less diffraction - bigger shadow.
I=mr²
N= C/velocity.

49. Centripetal acceleration formula
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
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)
A=v²/ r

50. Work performed by charge displacement? (hopefully...won't have to know)
Intensity a Amplitude/ d²
W= - kq1q2 (1/r2 - 1/r1)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.