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

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2. Graviational force formula
Angle of incidence=Angle of reflection
F=GM1M2/r²
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
Y= 1/ v(1-(v/c)²)

3. What is the apparent weight of a floating object?
KE=1/2mv²
Zero.
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
?= 4L + 1.6d

4. magnitude of charge on electron/proton
1.6*10?¹? C
The volume of the object.
F=ILBsin? (?= angle btw. L and B)
KE=1/2mv²

5. Electric field between two plates formula?
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
V=f?
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)
E= V/d

6. Converting Fahrenheit to Celsius
Longer ? - larger diffraction - smaller shadow.
F= (9/5)C+ 32
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Y= 1/ v(1-(v/c)²)

7. Efficiency of an engine formula
KE=1/2mv²
Negative - focus behind the lens (= virtual image)
Eff= 1- Qc/Qh = 1- Tc/Th
4.14 10?¹5 eVs

8. Index of refraction formula
F=ILBsin? (?= angle btw. L and B)
Q=m*L (where L is the latent heat of fusion or vaporization)
N= C/velocity.
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)

9. High frequency wave shave...
KE= (Y-1)mc² (= (Y-1)E)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Shorter ? - less diffraction - bigger shadow.
?= 4L + 1.6d

10. Gravitational constant
Zero.
G= 6.67 * 10?¹¹ Nm²/kg²
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Y= 1/ v(1-(v/c)²)

11. Low frequency waves have...
Vfinal²=V0²+ 2ad
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)
Longer ? - larger diffraction - smaller shadow.

12. Thin lens equation
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
1/f= 1/di + 1/do
Intensity a Amplitude/ d²
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V

13. Formula for velocity of waves?
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
V=f?
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)

14. Relativistic factor Y formula
Y= 1/ v(1-(v/c)²)
E0= 8.85 * 10?¹² C²/(Nm²)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)

15. If you drop an object into water the volume displaced equals...
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
F=mv²/ r
Eff= 1- Qc/Qh = 1- Tc/Th
The volume of the object.

16. Faraday's law
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Y= 1/ v(1-(v/c)²)
931MeV=1amu
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage

17. Maximum KE with which an emitted electron leaves is...?
Y= 1/ v(1-(v/c)²)
6.6310 ?³4 Js
W=qVoltage. (think C* J/C and C's cancel out)
KEmax= hf-F (= E-F= Energy of a photon - work function)

18. Formula for resistance of an OBJECT
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Shorter ? - less diffraction - bigger shadow.
Product of each lens's magnification

19. speed of light
C= 3*108 m/s
Induced current will flow opposite direction of magnetic flux.
Angle of incidence=Angle of reflection
1.67*10?²7kg

20. Newton's first law (Law of...)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
KE= (Y-1)mc² (= (Y-1)E)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

21. Formula for how velocity changes in air? (probably don't have to know)
V= 331 m/s + (.6 m/s°C)Temperature
A=v²/ r
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Product of each lens's magnification

22. If speed is slow/low - index of refraction is...
F=mv²/ r
Threshold frequency=F/h (= work functions/planck's constant)
(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)
Large/high

23. Velocity formula if time not given
Ni sin?i=nrsin?r
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Vfinal²=V0²+ 2ad
The incident angle at which total internal reflection occurs (use ?r=90°)

24. Heat formula
C= 3*108 m/s
Q=mc?T (where T is temperature)
Large/high
Length stationary=Length moving/Y

25. Distance formula?
The volume of the object.
KE=1/2mv²
(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)
Distance= velocity * time

26. Newton's second law
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
Fnet=ma
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)

27. Buoyant force formula
?= 4L + 1.6d
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Vfinal= V0 +at
Fb= mass of displaced fluid * gravity

28. Right-hand rule
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
F=mv²/ r
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

29. Apparent weight (weight of submerged object)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Y= 1/ v(1-(v/c)²)

30. Law of reflection
Negative - focus behind the lens (= virtual image)
KE=1/2mv²
Angle of incidence=Angle of reflection
Voltage=PE/q (remember Joules/Coulomb= volt)

31. ß? decay?
Fb= mass of displaced fluid * gravity
Length stationary=Length moving/Y
Felec=qE=[kq1q2]/r²
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)

32. Power formula?
P=IV=I²R=V² /R = Fd/t= Force*velocity
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
For every action there is an equal and opposite reaction
E= V/d

33. Heat of fusion/vaporization fromula
Q=m*L (where L is the latent heat of fusion or vaporization)
P=IV=I²R=V² /R = Fd/t= Force*velocity
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
E=hf (= Planck's constant*frequency)

34. Magnification equation
A=v²/ r
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
M= -di/do (=-hi/ho)
E= V/d

35. Magnetic force formula (for wire)?
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)
Ni sin?i=nrsin?r
F=ILBsin? (?= angle btw. L and B)

36. Sign of focus for convex lens?
Negative - focus behind the lens (= virtual image)
F=mv²/ r
E=hf (= Planck's constant*frequency)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage

37. Centripetal force formula
I=mr²
Fb= mass of displaced fluid * gravity
N= C/velocity.
F=mv²/ r

38. Threshold frequency explanation?
G= 6.67 * 10?¹¹ Nm²/kg²
KE=1/2mv²
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)

39. Law of refraction
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
E0= 8.85 * 10?¹² C²/(Nm²)
I=mr²
Ni sin?i=nrsin?r

40. Planck's constant in J*s?
6.6310 ?³4 Js
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
1.6*10?¹? C
Low

41. Impulse formula
4.14 10?¹5 eVs
The volume of the object.
?p=f?t (where f is AVERAGE force and t is how long force is applied)
F=ILBsin? (?= angle btw. L and B)

42. Relativistic formula for velocity
Ebinding= ?m * c² (= (?m)c²)
Voltage=PE/q (remember Joules/Coulomb= volt)
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)
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)

43. Magnetic force formula (for particle)?
C= 3*108 m/s
A=v²/ r
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)

44. Lenz's law
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Induced current will flow opposite direction of magnetic flux.
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)
Beat frequency= |F1-F2|

45. Binding energy formula
Felec=qE=[kq1q2]/r²
The incident angle at which total internal reflection occurs (use ?r=90°)
Ebinding= ?m * c² (= (?m)c²)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)

46. Formula for magnetic flux?
Longer ? - larger diffraction - smaller shadow.
The volume of the object.
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Vfinal²=V0²+ 2ad

47. deBroglie wavelength explanation
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
E0= 8.85 * 10?¹² C²/(Nm²)

48. Total KE 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)
Etotal= E rest + KE= mc² + (Y-1)mc²
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
W=qVoltage. (think C* J/C and C's cancel out)

49. Threshold frequency formula?

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50. What is the photoelectric effect?
The volume of the object.
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
A=v²/ r