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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. (Full) Displacement formula
The volume of the object.
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

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

3. Energy of an emitted photon formula?
Longer ? - larger diffraction - smaller shadow.
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Negative - focus behind the lens (= virtual image)
A=v²/ r

4. Potential Energy formula
Negative - focus behind the lens (= virtual image)
W= - kq1q2 (1/r2 - 1/r1)
PE=mgh
Shorter ? - less diffraction - bigger shadow.

5. Formula for energy levels within any atom?

6. Formula for how velocity changes in air? (probably don't have to know)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
A=v²/ r
V= 331 m/s + (.6 m/s°C)Temperature
Zero.

7. Faraday's law
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Momentum is always conserved in the absence of an outside force
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)

8. Newton's second law
KEmax= hf-F (= E-F= Energy of a photon - work function)
Fnet=ma
E= kq/r² (= f/q)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted

9. Index of refraction formula
?IE= - W (work)
Beat frequency= |F1-F2|
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
N= C/velocity.

10. Capacitance formula? (there are two)
Ni sin?i=nrsin?r
Momentum is always conserved in the absence of an outside force
6.6310 ?³4 Js
C= Q/V = e0 *A/d

11. Activity of a radioactive sample formula? (probably don't have to know)
Momentum is always conserved in the absence of an outside force
?p=f?t (where f is AVERAGE force and t is how long force is applied)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Low

12. Ideal gas law
W= - kq1q2 (1/r2 - 1/r1)
Negative - focus behind the lens (= virtual image)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)

13. Formula for electric potential energy?
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
P=IV=I²R=V² /R = Fd/t= Force*velocity
?IE= - W (work)
E= V/d

14. Relativistic factor Y formula
KE= (Y-1)mc² (= (Y-1)E)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Y= 1/ v(1-(v/c)²)
Intensity a Amplitude/ d²

15. Magnetic force formula (for wire)?
F=ILBsin? (?= angle btw. L and B)
Fb= mass of displaced fluid * gravity
V= 331 m/s + (.6 m/s°C)Temperature
?= 4L + 1.6d

16. Law of reflection
E= kq/r² (= f/q)
P=mv (?p=m?v)
Angle of incidence=Angle of reflection
Product of each lens's magnification

17. Binding energy formula
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
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. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
Fnet=ma
?= 4L + 1.6d
KE=1/2mv²
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)

19. Conservation of momentum
?Tstationary= Y (?Tmoving)
Positive - focus in front of the lens (=real image)
F=GM1M2/r²
Momentum is always conserved in the absence of an outside force

20. Work formula
Etotal= E rest + KE= mc² + (Y-1)mc²
Intensity a Amplitude/ d²
?p=f?t (where f is AVERAGE force and t is how long force is applied)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage

21. energy in a reaction q formula?
N= C/velocity.
E0= 8.85 * 10?¹² C²/(Nm²)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
P=mv (?p=m?v)

22. Newton's first law (Law of...)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
C= Q/V = e0 *A/d
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)

23. If you drop an object into water the volume displaced equals...
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Y= 1/ v(1-(v/c)²)
The volume of the object.
Eff= 1- Qc/Qh = 1- Tc/Th

24. Momentum formula?
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
E= kq/r² (= f/q)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
P=mv (?p=m?v)

25. Conversion factor from atomic mass units to MeV?
G= 6.67 * 10?¹¹ Nm²/kg²
931MeV=1amu
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
F= (9/5)C+ 32

26. Threshold frequency explanation?
931MeV=1amu
E=hf (= Planck's constant*frequency)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
C= Q/V = e0 *A/d

27. Formula for energy of a photon?

28. Planck's constant in electronvolts* seconds?
Ni sin?i=nrsin?r
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
For every action there is an equal and opposite reaction
4.14 10?¹5 eVs

29. Magnetic force formula (for particle)?
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Vfinal= V0 +at
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

30. Right-hand rule
E0= 8.85 * 10?¹² C²/(Nm²)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
V= 331 m/s + (.6 m/s°C)Temperature
4.14 10?¹5 eVs

31. Planck's constant in J*s?
P=IV=I²R=V² /R = Fd/t= Force*velocity
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
6.6310 ?³4 Js
Etotal= E rest + KE= mc² + (Y-1)mc²

32. Velocity formula if time not given
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
4.14 10?¹5 eVs
Vfinal²=V0²+ 2ad
V=IR

33. Elastic potential energy for a spring formula
Low
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
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)
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)

34. Internal energy....equals?
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Q=m*L (where L is the latent heat of fusion or vaporization)
Voltage=PE/q (remember Joules/Coulomb= volt)
?IE= - W (work)

35. High frequency wave shave...
W=qVoltage. (think C* J/C and C's cancel out)
Shorter ? - less diffraction - bigger shadow.
V=f?
Beat frequency= |F1-F2|

36. How to find total magnification?

37. Threshold frequency formula?

38. Converting Fahrenheit to Celsius
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
F= (9/5)C+ 32
P=IV=I²R=V² /R = Fd/t= Force*velocity
For every action there is an equal and opposite reaction

39. Electric field between two plates formula?
V= 331 m/s + (.6 m/s°C)Temperature
1.6*10?¹? C
E= V/d
Longer ? - larger diffraction - smaller shadow.

40. Distance formula?
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)
V=IR
Distance= velocity * time
Q=mc?T (where T is temperature)

41. Torque formula
KEmax= hf-F (= E-F= Energy of a photon - work function)
Threshold frequency=F/h (= work functions/planck's constant)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration

42. Formula for diffraction pattern - Anti-node to Anti-node (A-A)
KE=1/2mv²
Longer ? - larger diffraction - smaller shadow.
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)
F=ILBsin? (?= angle btw. L and B)

43. Formula for resistance of an OBJECT
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
C= 3*108 m/s
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.

44. Electron capture
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)
The volume of the object.
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration

45. Critical angle is...
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
4.14 10?¹5 eVs
The incident angle at which total internal reflection occurs (use ?r=90°)
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)

46. Power formula?
I=mr²
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
P=IV=I²R=V² /R = Fd/t= Force*velocity
The volume of the object.

47. Low frequency waves have...
Large/high
Longer ? - larger diffraction - smaller shadow.
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
931MeV=1amu

48. Heat formula
F=mv²/ r
?p=f?t (where f is AVERAGE force and t is how long force is applied)
K= 9 * 10? Nm²/C²
Q=mc?T (where T is temperature)

49. Gravitational constant
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
G= 6.67 * 10?¹¹ Nm²/kg²
Low
V= 331 m/s + (.6 m/s°C)Temperature

50. (Full/Final) Velocity formula
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
F= (9/5)C+ 32
C= Q/V = e0 *A/d
Vfinal= V0 +at