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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. Lenz's law
Ni sin?i=nrsin?r
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
F=GM1M2/r²
Induced current will flow opposite direction of magnetic flux.

2. Formula for energy levels within any atom?

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3. Power formula?
Longer ? - larger diffraction - smaller shadow.
Beat frequency= |F1-F2|
P=IV=I²R=V² /R = Fd/t= Force*velocity
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)

4. If speed is slow/low - index of refraction is...
V= 331 m/s + (.6 m/s°C)Temperature
Large/high
Intensity a Amplitude/ d²
V=IR

5. Torque formula
P=mv (?p=m?v)
Q=m*L (where L is the latent heat of fusion or vaporization)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
PE=mgh

6. Potential Energy formula
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
PE=mgh
Momentum is always conserved in the absence of an outside force

7. Moment of Inertia (a.k.a. rotational mass)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
I=mr²
Negative - focus behind the lens (= virtual image)
1.67*10?²7kg

8. What is the photoelectric effect?
Felec=qE=[kq1q2]/r²
Ebinding= ?m * c² (= (?m)c²)
Fb= mass of displaced fluid * gravity
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)

9. Electron capture
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Shorter ? - less diffraction - bigger shadow.

10. ß? decay?
931MeV=1amu
?Tstationary= Y (?Tmoving)
C= Q/V = e0 *A/d
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)

11. speed of light
?= 4L + 1.6d
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)
C= 3*108 m/s

12. Threshold frequency formula?

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13. Newton's second law
Fnet=ma
Fb= mass of displaced fluid * gravity
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
KE= (Y-1)mc² (= (Y-1)E)

14. K constant for electric field formula?
K= 9 * 10? Nm²/C²
Q=m*L (where L is the latent heat of fusion or vaporization)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
E= V/d

15. Faraday's law
A=v²/ r
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Vfinal= V0 +at
?p=f?t (where f is AVERAGE force and t is how long force is applied)

16. ONE END CAPPED PIPE FREQUENCY (Frequency/Harmonic series of a pipe closed at one ned)
?Tstationary= Y (?Tmoving)
E= kq/r² (= f/q)
Threshold frequency=F/h (= work functions/planck's constant)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)

17. Magnification equation
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)
M= -di/do (=-hi/ho)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
KE=1/2mv²

18. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
PE=mgh
The volume of the object.
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
?= 4L + 1.6d

19. Formula for how velocity changes in air? (probably don't have to know)
V=IR
The incident angle at which total internal reflection occurs (use ?r=90°)
V= 331 m/s + (.6 m/s°C)Temperature
For every action there is an equal and opposite reaction

20. Kinetic Energy formula
V= 331 m/s + (.6 m/s°C)Temperature
KEmax= hf-F (= E-F= Energy of a photon - work function)
F=mv²/ r
KE=1/2mv²

21. Activity of a radioactive sample formula? (probably don't have to know)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
I=mr²
Etotal= E rest + KE= mc² + (Y-1)mc²
1.6*10?¹? C

22. Momentum formula?
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
V=f?
P=mv (?p=m?v)
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)

23. Buoyant force formula
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Ni sin?i=nrsin?r
Momentum is always conserved in the absence of an outside force
Fb= mass of displaced fluid * gravity

24. Mass defect explanation

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25. Formula for velocity of waves?
F=GM1M2/r²
Zero.
E= kq/r² (= f/q)
V=f?

26. Formula for energy of a photon?

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27. Binding energy explanation
F=mv²/ r
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
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)

28. magnitude of charge on electron/proton
C= Q/V = e0 *A/d
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
C= 3*108 m/s
1.6*10?¹? C

29. Voltage formula (for circuit - etc.)
V=IR
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
P=IV=I²R=V² /R = Fd/t= Force*velocity
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)

30. Electric force formula? (two)
Felec=qE=[kq1q2]/r²
KE=1/2mv²
Q=mc?T (where T is temperature)
W= - kq1q2 (1/r2 - 1/r1)

31. Threshold frequency explanation?
?Tstationary= Y (?Tmoving)
Longer ? - larger diffraction - smaller shadow.
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Distance= velocity * time

32. If you drop an object into water the volume displaced equals...
C= 3*108 m/s
The volume of the object.
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
F=ILBsin? (?= angle btw. L and B)

33. Graviational force formula
Positive - focus in front of the lens (=real image)
F=mv²/ r
F=GM1M2/r²
?Tstationary= Y (?Tmoving)

34. Conversion factor from atomic mass units to MeV?
Fb= mass of displaced fluid * gravity
931MeV=1amu
Voltage=PE/q (remember Joules/Coulomb= volt)
Product of each lens's magnification

35. Thin lens equation
1/f= 1/di + 1/do
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
E= V/d
F=ILBsin? (?= angle btw. L and B)

36. Apparent weight (weight of submerged object)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
P=IV=I²R=V² /R = Fd/t= Force*velocity
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)

37. mass of a proton/neutron (there's a slight difference but ignore it - neutron has slightly more mass)
E=hf (= Planck's constant*frequency)
1.67*10?²7kg
Angle of incidence=Angle of reflection
931MeV=1amu

38. Formula for electric potential energy?
C= 3*108 m/s
F=mv²/ r
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Induced current will flow opposite direction of magnetic flux.

39. (Full/Final) Velocity formula
Vfinal= V0 +at
?= 4L + 1.6d
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)
V=IR

40. Magnetic force formula (for particle)?
Vfinal²=V0²+ 2ad
Momentum is always conserved in the absence of an outside force
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
V=IR

41. Formula for diffraction pattern - Anti-node to node (A-N)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Etotal= E rest + KE= mc² + (Y-1)mc²
E= V/d
(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)

42. Low frequency waves have...
?IE= - W (work)
Longer ? - larger diffraction - smaller shadow.
F=ILBsin? (?= angle btw. L and B)
F= (9/5)C+ 32

43. Newton's third law
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
Shorter ? - less diffraction - bigger shadow.
KE=1/2mv²
For every action there is an equal and opposite reaction

44. 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)
Y= 1/ v(1-(v/c)²)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
6.6310 ?³4 Js

45. (Full) Displacement formula
E= kq/r² (= f/q)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Low
Product of each lens's magnification

46. Right-hand rule
W=qVoltage. (think C* J/C and C's cancel out)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
F=ILBsin? (?= angle btw. L and B)
Ni sin?i=nrsin?r

47. Distance formula?
Fb= mass of displaced fluid * gravity
Vfinal= V0 +at
Distance= velocity * time
KE= (Y-1)mc² (= (Y-1)E)

48. Law of reflection
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
1/f= 1/di + 1/do
Y= 1/ v(1-(v/c)²)
Angle of incidence=Angle of reflection

49. Formula for diffraction pattern - Anti-node to Anti-node (A-A)
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)
V=IR
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
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)

50. Capacitance formula? (there are two)
P=IV=I²R=V² /R = Fd/t= Force*velocity
C= Q/V = e0 *A/d
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
I=mr²