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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. Newton's second law
Induced current will flow opposite direction of magnetic flux.
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Fnet=ma

2. speed of light
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Ni sin?i=nrsin?r
The incident angle at which total internal reflection occurs (use ?r=90°)
C= 3*108 m/s

3. Work formula
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
1.67*10?²7kg
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)

4. Electric force formula? (two)
Positive - focus in front of the lens (=real image)
Felec=qE=[kq1q2]/r²
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

5. Conversion factor from atomic mass units to MeV?
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Induced current will flow opposite direction of magnetic flux.
Eff= 1- Qc/Qh = 1- Tc/Th
931MeV=1amu

6. Heat of fusion/vaporization fromula
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Shorter ? - less diffraction - bigger shadow.
Q=m*L (where L is the latent heat of fusion or vaporization)
?Tstationary= Y (?Tmoving)

7. Graviational force formula
F=GM1M2/r²
4.14 10?¹5 eVs
Low
931MeV=1amu

8. Converting Fahrenheit to Celsius
C= Q/V = e0 *A/d
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
F= (9/5)C+ 32
Vfinal²=V0²+ 2ad

9. Elastic potential energy for a spring formula
4.14 10?¹5 eVs
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Felec=qE=[kq1q2]/r²

10. Work function F is..?
KE=1/2mv²
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Product of each lens's magnification

11. Velocity formula if time not given
?= 4L + 1.6d
Vfinal²=V0²+ 2ad
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
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)

12. (Full/Final) Velocity formula
K= 9 * 10? Nm²/C²
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)
Vfinal= V0 +at
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

13. Planck's constant in electronvolts* seconds?
KE=1/2mv²
Large/high
PE=mgh
4.14 10?¹5 eVs

14. Sign of focus for concave lens?
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Positive - focus in front of the lens (=real image)
Etotal= E rest + KE= mc² + (Y-1)mc²
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)

15. Centripetal force formula
F=mv²/ r
Low
Large/high
Q=mc?T (where T is temperature)

16. What is the photoelectric effect?
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Q=mc?T (where T is temperature)
Momentum is always conserved in the absence of an outside force

17. Formula for diffraction pattern - Anti-node to Anti-node (A-A)
Length stationary=Length moving/Y
Eff= 1- Qc/Qh = 1- Tc/Th
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)
Q=mc?T (where T is temperature)

18. Mass defect explanation

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19. Newton's third law
For every action there is an equal and opposite reaction
E= V/d
Voltage=PE/q (remember Joules/Coulomb= volt)
Q=m*L (where L is the latent heat of fusion or vaporization)

20. Beat frequency
Intensity a Amplitude/ d²
Beat frequency= |F1-F2|
F= (9/5)C+ 32
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)

21. Power formula?
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
P=IV=I²R=V² /R = Fd/t= Force*velocity
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)

22. Relativistic formula for (kinetic) energy
The volume of the object.
Momentum is always conserved in the absence of an outside force
6.6310 ?³4 Js
KE= (Y-1)mc² (= (Y-1)E)

23. Voltage formula (think units of volts are what?) (NOT in terms of I and R)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
Threshold frequency=F/h (= work functions/planck's constant)
Voltage=PE/q (remember Joules/Coulomb= volt)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)

24. Distance formula?
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
Distance= velocity * time

25. Formula for electric field?
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
I=mr²
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
E= kq/r² (= f/q)

26. Light intensity is proportional to..
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
F=ILBsin? (?= angle btw. L and B)
Y= 1/ v(1-(v/c)²)
Intensity a Amplitude/ d²

27. Formula for electric potential energy?
F=GM1M2/r²
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Angle of incidence=Angle of reflection

28. Newton's first law (Law of...)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
M= -di/do (=-hi/ho)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
The incident angle at which total internal reflection occurs (use ?r=90°)

29. 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)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Product of each lens's magnification
I=mr²

30. Law of refraction
Zero.
KE= (Y-1)mc² (= (Y-1)E)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Ni sin?i=nrsin?r

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

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32. Internal energy....equals?
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Ebinding= ?m * c² (= (?m)c²)
Low
?IE= - W (work)

33. deBroglie wavelength explanation
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
P=IV=I²R=V² /R = Fd/t= Force*velocity

34. Magnetic force formula (for particle)?
F=mv²/ r
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
P=IV=I²R=V² /R = Fd/t= Force*velocity
?Tstationary= Y (?Tmoving)

35. Law of reflection
Angle of incidence=Angle of reflection
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
V=f?
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)

36. Moment of Inertia (a.k.a. rotational mass)
I=mr²
Q=m*L (where L is the latent heat of fusion or vaporization)
M= -di/do (=-hi/ho)
E= kq/r² (= f/q)

37. ß? decay?
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)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
1.6*10?¹? C
Ebinding= ?m * c² (= (?m)c²)

38. Heat formula
Q=mc?T (where T is temperature)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)

39. Sign of focus for convex lens?
Negative - focus behind the lens (= virtual image)
G= 6.67 * 10?¹¹ Nm²/kg²
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
6.6310 ?³4 Js

40. Apparent weight (weight of submerged object)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Vfinal= V0 +at
Ebinding= ?m * c² (= (?m)c²)
Eff= 1- Qc/Qh = 1- Tc/Th

41. Faraday's law
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
1.6*10?¹? C

42. Capacitance formula? (there are two)
1/f= 1/di + 1/do
(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)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
C= Q/V = e0 *A/d

43. Impulse formula
Intensity a Amplitude/ d²
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
E0= 8.85 * 10?¹² C²/(Nm²)
?p=f?t (where f is AVERAGE force and t is how long force is applied)

44. What is the apparent weight of a floating object?
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
The volume of the object.
Zero.
Product of each lens's magnification

45. If speed is slow/low - index of refraction is...
V=IR
Zero.
Large/high
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)

46. New/old gas formula?

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47. Low frequency waves have...
Longer ? - larger diffraction - smaller shadow.
A=v²/ r
Eff= 1- Qc/Qh = 1- Tc/Th
M= -di/do (=-hi/ho)

48. Planck's constant in J*s?
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
W=qVoltage. (think C* J/C and C's cancel out)
M= -di/do (=-hi/ho)
6.6310 ?³4 Js

49. Torque formula
Shorter ? - less diffraction - bigger shadow.
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
W=qVoltage. (think C* J/C and C's cancel out)
Low

50. Right-hand rule
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
?p=f?t (where f is AVERAGE force and t is how long force is applied)
4.14 10?¹5 eVs
KE= (Y-1)mc² (= (Y-1)E)