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AP Physics

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. What is Huygen's Principle?
E=V/d
Vy=Vyo + gt ...Watch the signs.
According to Coulomb's Law - the new force is 6/4 times the old charge.
Every point on a wave front is a secondary source.

2. What is implied when an object is not accelerating in the x direction?
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
(Cross-sectional Area)(Velocity)
The body is moving at a constant velocity
The work function is a minimum amount of energy needed to release a photon from a collection in the surface of a material. The ionization energy is the energy needed to release an electron from a single - free-floating - molecule. the ionization ener

3. What kind of image do you get when the object is placed at the focus?
No image.
Concave
Newton
(rho)gh

4. What is the Bohr Model of the atom?
Statistically speaking - energy flows from hot to cold.
'm' is replaced by 'q -' and 'g' is replaced by 'E.' W=mg is replaced by F=qE. The second formula describes the force on a charged particle in uniform electric field.
That the orbits of the electrons are like planets around the Sun.
Parallel. Because the plates are shared.

5. What quantity is calculated from slope of the displacement versus time graph?
Break it up into x and y components using trig - add up the components.
Concave
velocity
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.

6. When is sum of force (net force) zero?
Bends waves around small objects and the interference of waves from a coherent sources.
When a body is moving at a constant velocity or not moving at all.
Gamma
Break it up into x and y components using trig - add up the components.

7. What is the second law of thermodynamics?
The movement of charges is the current and it is measures by the number of charges per second at a point.
Weight ...w=mg
Impulse is (force)(time)
Statistically speaking - energy flows from hot to cold.

8. What is the formula relating emf and voltage?
The velocity is positive
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
Work is the change in kinetic energy. Work transfers energy to and from a body
m^3/s

9. What does the term electric potential energy mean?
Impulse
It is when a nucleon changes properties. Like a neutron changing into a proton.
Electric potential is the potential energy associated with the electric force F=qE
Force lifting a body when it is in a fluid.

10. What does light absorption involve?
The incoming light (electromagnetic wave) has the same frequency as some of the electrons.
The higher the temperature the higher the resistance. They are proportional to each other.
It is the time for 1/2 a substance to decay by radioactive processes.
W=qV where 'W' is the work - 'q' is the charge and 'V' is the potential difference measured in Volts.

11. Which kind of mirror cannot magnify an image?
This is the highest point of the swinging motion. PE is at a maximum. Displacement is the greatest from equilibrium. KE and Velocity are zero.
Convex
Work done 'BY' the gas.
(mg)sin(angle)

12. This is used to determine the speed of a fluid when the pipe slopes up or down.

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13. How does thickness effect resistance?
The thicker the wire - the lower the resistance.
The body is moving at a constant velocity
The volume under water
The electric field forces charges to move.

14. What two things must be true for a positive magnification?
Joule
It is used in Lenz's Law to determine the change in flux of a conductor.
(1) The image is larger than the object: ho>hi. (2) image is upright.
The new force is 2/4 or 1/2 times the old force. ...Because the force of gravity varies directly with the masses and inverse squared to the distance apart.

15. What are three ways to increase the capacitance of a capacitor?
E=V/d
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.
Statistically speaking - energy flows from hot to cold.
Weight ...w=mg

16. What is the relationship between power - voltage and current?
When it is on the same side as the image?
The NET work BY a system is the area enclosed in a cycle on a PV diagram.
P=IV
It is towards the center and downwards a little. It is the sum of the normal force perpendicular to the bowl and the weight downwards.

17. What do you do with any vector that is not on either the x or y axis?
Weber
2(pi)R/T ...Circumference/Period
Break it up into x and y components using trig - add up the components.
(1) Bounced off the vertex. (2) Parallel the through the focus. (3) Through the focus and parallel.

18. What is the difference between a motor and a generator?
Conservation of Energy ... because E=hf
W = KE:final - KE:initial
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
Weber

19. Flow Rate
The release of a particle or photon from an UNSTABLE nucleus.
Diverging
The centripetal force points along the radius towards the center of the circle.
(Cross-sectional Area)(Velocity)

20. What is the y intercept of the velocity time graph?
Impulse
Converging lenses have a positive focal length.
Speed ups
The initial velocity - (Vo in the formulas)

21. What does light emission involve?
Electromagnetic wave exits the electrons to a higher orbital. When the electron relaxes - a wavelength of light is given off.
When it is on the 'dark' side of the mirror. Opposite the light.
Initial velocity
KE = (3/2)kT

22. S.I. unit of Flow rate
It is the time for 1/2 a substance to decay by radioactive processes.
m^3/s
The body is moving at a constant velocity
Concave mirrors are converging mirrors.

23. The speed of a ball when it lands at the same height it was thrown from.
Initial velocity
Electromagnetic wave exits the electrons to a higher orbital. When the electron relaxes - a wavelength of light is given off.
The release of a particle or photon from an UNSTABLE nucleus.
Impulse

24. What is the difference between emf and voltage?
Emf is the maximum available energy per charge at the terminal of a power source. Voltage is the actual available energy per charge at the terminals of a power source. Some energy is lost due to the source internal resistance.
The measure of the average kinetic energy of the molecules.
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
The refracted light ray is bent 90°. (Parallel to the interface surface.)

25. What cause an electromagnetic wave - and what makes the wave propagate indefinitely even in a vacuum?
The interaction between an oscillating electric magnetic fields that are oriented 90° to each other. It propagates indefinitely because the wave takes its own medium.
A1v1=a2v2
When it is on the same side as the image?
Emf is the maximum available energy per charge at the terminal of a power source. Voltage is the actual available energy per charge at the terminals of a power source. Some energy is lost due to the source internal resistance.

26. What is impulse?
But placing more obstacles in the path of the charge's flow.
When it is on the 'dark' side of the mirror. Opposite the light.
Impulse is the change in momentum
Pascal

27. When is the image negative for mirrors?

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28. Electric force felt by a charge due to another charge.
V=Vo + at ...The word 'dropped' means no initial velocity.
F=kq1q2/R^2
Transverse waves: The displacement is perpendicular to the wave's motion. Longitudinal waves: The displacement is in the direction of the wave's motion.
Pgh ..thats ('rho')(gravity's acceleration)(height)

29. What is temperature?
Zero. Because the displacement is perpendicular to the force (centripetal force.)
Pascal
The measure of the average kinetic energy of the molecules.
The force is perpendicular to the motion. This always results in a curved path. (Open right hand rule)

30. What is the relationship between speed - frequency - and wavelength?
Change in voltage across the resistor or capacitor.
m=(rho)V
PV=nRT and PV=kT
wave speed = (wavelength)(frequency)

31. What is force times time?
Moment arm
Lenses that are fatter in the middle than on the edges.
Impulse
The release of an electron and antineutrino or the release of a positron and a neutrino.

32. What is the energy of a photon?

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33. In a pendulum or spring - what are the displacement - velocity - PES - and K at maximum displacement?
This is the highest point of the swinging motion. PE is at a maximum. Displacement is the greatest from equilibrium. KE and Velocity are zero.
W = KE:final - KE:initial
Convex
The longer the length of wire - the higher the resistance.

34. What is its impact on the first law of thermodynamics of an adiabatic process?
Q=0 because thermal energy is not transfered between the system and its surroundings
A1v1=a2v2
Bends waves around small objects and the interference of waves from a coherent sources.
The incoming light (electromagnetic wave) has the same frequency as some of the electrons.

35. What is transmutation?
It is when a nucleon changes properties. Like a neutron changing into a proton.
The electron
wave speed = (wavelength)(frequency)
A potential difference and a flow and energized charges.

36. What is the strong force?
Tesla
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.
Diverging
THe force that holds the nucleus together.

37. What forces charges to move?
KE=Work
When a body is moving at a constant velocity or not moving at all.
The electric field forces charges to move.
The energy required to remove an electron or nucleon from a molecule.

38. How is the net work of a system (gas) measured?
The NET work BY a system is the area enclosed in a cycle on a PV diagram.
F=kq1q2/R^2
Magnitude and direction
The thicker the wire - the lower the resistance.

39. Define reflection
The light travels through the image.
The bouncing of light
Work
m=(rho)V

40. Under what conditions is work by a system ( gas) positive?
The work function is a minimum amount of energy needed to release a photon from a collection in the surface of a material. The ionization energy is the energy needed to release an electron from a single - free-floating - molecule. the ionization ener
Work by a system is positive when the gas expands. (The volume increases.)
(1) Bounced off the vertex. (2) Parallel the through the focus. (3) Through the focus and parallel.
Atomic mass number minus atomic number.

41. Define Refraction
When the body rests on a surface.
The bending of light
The particle travels in a circle. Radius=momentum/qB
The bouncing of light

42. Unit of electric field
Q=0 because thermal energy is not transfered between the system and its surroundings
N/C
(1) The image is larger than the object: ho>hi. (2) image is upright.
G(M:earth)/r^2 ...force of gravity = G(M:earth)(M:body)/r^2

43. What is implied when an object is not accelerating in the y direction?
Atmospheric pressure
Sum of the torques equal zero.
The movement of charges is the current and it is measures by the number of charges per second at a point.
g=zero so h=(Vyo)t

44. When light travels from MORE dense to LESS dense mediums - how does the refracted ray bend in relation to the normal line?
Lenses that are fatter in the middle than on the edges.
the refracted ray bends AWAY from the normal line.
A potential difference and a flow and energized charges.
The volume under water

45. What makes an image 'real?'
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
The incoming light (electromagnetic wave) has the same frequency as some of the electrons.
The CHANGE in velocity.
The light travels through the image.

46. Unit of energy for electricity.
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.
The bouncing of light
V - a Joule/Coulomb
It is when a nucleon changes properties. Like a neutron changing into a proton.

47. S.I. unit of momentum
ROY-G-BIV: Red - Orange - Yellow - Green - Blue - Indigo - Violet
kg•m/s
Impulse is the change in momentum
Alpha - Beta - and Gamma

48. Formula for work as a charged particle travels across two charged plates
W=qV
Obstacles in the path of the flow of charges.
ROY-G-BIV: Red - Orange - Yellow - Green - Blue - Indigo - Violet
Newton

49. Buoyancy
Force lifting a body when it is in a fluid.
Diverging
According to Coulomb's Law - the new force is 6/4 times the old charge.
No image.

50. What is the 1st law of thermodynamics as applied to gases?
DU = Q+W ...dU:of the environment = Q:from the environment + W:by the environment
The bending of light
The force is perpendicular to the motion to get a circular path of motion. (Think about centripetal force.)
Obstacles in the path of the flow of charges.