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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. Formula for magnetic flux?
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Ebinding= ?m * c² (= (?m)c²)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
C= 3*108 m/s

2. Impulse formula
Threshold frequency=F/h (= work functions/planck's constant)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Large/high
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)

3. Relativistic formula for (kinetic) energy
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
KE= (Y-1)mc² (= (Y-1)E)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Q=m*L (where L is the latent heat of fusion or vaporization)

4. K constant for electric field formula?
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)
K= 9 * 10? Nm²/C²
F=mv²/ r
Q=m*L (where L is the latent heat of fusion or vaporization)

5. Elastic potential energy for a spring formula
M= -di/do (=-hi/ho)
V= 331 m/s + (.6 m/s°C)Temperature
PE=mgh
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)

6. Heat of fusion/vaporization fromula
Y= 1/ v(1-(v/c)²)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Q=m*L (where L is the latent heat of fusion or vaporization)

7. ß? decay?
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
1.6*10?¹? C
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

8. Efficiency of an engine formula
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Eff= 1- Qc/Qh = 1- Tc/Th
F= (9/5)C+ 32

9. Law of reflection
K= 9 * 10? Nm²/C²
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
W= - kq1q2 (1/r2 - 1/r1)
Angle of incidence=Angle of reflection

10. Moment of Inertia (a.k.a. rotational mass)
I=mr²
The incident angle at which total internal reflection occurs (use ?r=90°)
Intensity a Amplitude/ d²
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

11. Formula for electric field?
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
E= kq/r² (= f/q)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)

12. Sign of focus for concave lens?
W= - kq1q2 (1/r2 - 1/r1)
Positive - focus in front of the lens (=real image)
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
1.6*10?¹? C

13. deBrolglie wavelength formula

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14. Binding energy explanation
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
1.6*10?¹? C
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Fnet=ma

15. (Full) Displacement formula
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)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

16. Faraday's law
The volume of the object.
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
F= (9/5)C+ 32
Q=mc?T (where T is temperature)

17. Formula for resistance of an OBJECT
C= 3*108 m/s
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Ebinding= ?m * c² (= (?m)c²)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)

18. Binding energy formula
Ebinding= ?m * c² (= (?m)c²)
Vfinal²=V0²+ 2ad
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
F= (9/5)C+ 32

19. Planck's constant in J*s?
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Positive - focus in front of the lens (=real image)
6.6310 ?³4 Js
Ebinding= ?m * c² (= (?m)c²)

20. Formula for velocity of waves?
?p=f?t (where f is AVERAGE force and t is how long force is applied)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
V=f?
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)

21. (Full/Final) Velocity formula
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Vfinal= V0 +at
E= V/d
?= 4L + 1.6d

22. Law of refraction
V= 331 m/s + (.6 m/s°C)Temperature
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
Ni sin?i=nrsin?r
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

23. Converting Fahrenheit to Celsius
F= (9/5)C+ 32
E=hf (= Planck's constant*frequency)
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)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)

24. Light intensity is proportional to..
The volume of the object.
KEmax= hf-F (= E-F= Energy of a photon - work function)
Intensity a Amplitude/ d²
KE= (Y-1)mc² (= (Y-1)E)

25. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
Threshold frequency=F/h (= work functions/planck's constant)
Beat frequency= |F1-F2|
?= 4L + 1.6d
Fb= mass of displaced fluid * gravity

26. Electric force formula? (two)
?Tstationary= Y (?Tmoving)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Felec=qE=[kq1q2]/r²
For every action there is an equal and opposite reaction

27. High frequency wave shave...
P=IV=I²R=V² /R = Fd/t= Force*velocity
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Shorter ? - less diffraction - bigger shadow.

28. Relativistic formula for velocity
Voltage=PE/q (remember Joules/Coulomb= volt)
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)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
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)

29. Maximum KE with which an emitted electron leaves is...?
Threshold frequency=F/h (= work functions/planck's constant)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
KEmax= hf-F (= E-F= Energy of a photon - work function)

30. Newton's third law
Felec=qE=[kq1q2]/r²
Vfinal²=V0²+ 2ad
For every action there is an equal and opposite reaction
Angle of incidence=Angle of reflection

31. ONE END CAPPED PIPE FREQUENCY (Frequency/Harmonic series of a pipe closed at one ned)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Intensity a Amplitude/ d²
6.6310 ?³4 Js
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)

32. Gravitational constant
4.14 10?¹5 eVs
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
G= 6.67 * 10?¹¹ Nm²/kg²
KE=1/2mv²

33. Centripetal force formula
G= 6.67 * 10?¹¹ Nm²/kg²
F=mv²/ r
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
Y= 1/ v(1-(v/c)²)

34. Low frequency waves have...
4.14 10?¹5 eVs
Low
Longer ? - larger diffraction - smaller shadow.
F=ILBsin? (?= angle btw. L and B)

35. New/old gas formula?

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36. Heat formula
P=mv (?p=m?v)
W= - kq1q2 (1/r2 - 1/r1)
Q=mc?T (where T is temperature)
KEmax= hf-F (= E-F= Energy of a photon - work function)

37. Threshold frequency formula?

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38. Electron capture
Voltage=PE/q (remember Joules/Coulomb= volt)
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
Etotal= E rest + KE= mc² + (Y-1)mc²

39. Magnification equation
M= -di/do (=-hi/ho)
C= 3*108 m/s
Positive - focus in front of the lens (=real image)
4.14 10?¹5 eVs

40. Magnetic force formula (for particle)?
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Large/high
Fnet=ma
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)

41. Velocity formula if time not given
PE=mgh
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Vfinal²=V0²+ 2ad
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

42. Ideal gas law
PE=mgh
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)

43. Formula for diffraction pattern - Anti-node to node (A-N)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Beat frequency= |F1-F2|
(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)

44. Thin lens equation
PE=mgh
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
?= 4L + 1.6d
1/f= 1/di + 1/do

45. What is the apparent weight of a floating object?
?Tstationary= Y (?Tmoving)
Zero.
KE=1/2mv²
G= 6.67 * 10?¹¹ Nm²/kg²

46. Conversion factor from atomic mass units to MeV?
E= V/d
931MeV=1amu
Fnet=ma
Ebinding= ?m * c² (= (?m)c²)

47. What is the photoelectric effect?
E0= 8.85 * 10?¹² C²/(Nm²)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
C= Q/V = e0 *A/d
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)

48. Capacitance constant
Etotal= E rest + KE= mc² + (Y-1)mc²
E0= 8.85 * 10?¹² C²/(Nm²)
E= V/d
Large/high

49. Formula for electric potential energy?
Q=mc?T (where T is temperature)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
1/f= 1/di + 1/do
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)

50. Formula for energy of a photon?

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