AP Physics

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. What direction controls time in falling body and projectile motion problems?
Entropy always increases.
But placing more obstacles in the path of the charge's flow.
Vertical direction
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)


2. What is the component of 'mg' parallel to a slope?
Vertical direction
Only 1/2 a wavelength fits in the tube. L=wavelength/2
A potential difference and a flow and energized charges.
(mg)sin(angle)


3. What is force times the perpendicular distance?
Potential energy stored in gravity (PE = mgh)
Zero. Because the displacement is perpendicular to the force (centripetal force.)
Torque
Ohm's Law: V=IR


4. What is the name given to the distance between the pivot point and applied perpendicular force?
That the orbits of the electrons are like planets around the Sun.
x=(1/2)at^2 Remember - the word 'dropped' implies no initial velocity.
Moment arm
Newton


5. What are three ways to increase the capacitance of a capacitor?
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.
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.
Something other than zero.
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.


6. What is temperature?
The bouncing of light
Dark in the middle and alternating light and dark spots after that.
The measure of the average kinetic energy of the molecules.
The electric force (Coulomb's Law) can attract and repel and it depends on charge. Universal Gravity depends on mass and always attracts.


7. What is the horizontal acceleration of projectiles?
Weight ...w=mg
ZERO
The charge on each capacitor.
Work by a system is negative when the gas contracts. (The volume decreases.)


8. What is the path of a charged particle in a magnetic field?
dU = zero. The change in temperature of the gas is zero.
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
Pascal
The particle travels in a circle. Radius=momentum/qB


9. What is the relationship between speed - frequency - and wavelength?
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.
wave speed = (wavelength)(frequency)
Reflection is the bouncing of waves. Refraction is the bending of waves. Diffraction bends waves around small objects and causes interference from a coherent sources.
Pascal


10. What equation describes the distance that a horizontally launched projectile falls t seconds after it started moving?
Convex
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
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.
Potential difference is the change in energy of a charged particle divided by its charge.


11. Which kind of lens always has a virtual image?
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.
Diverging
Work
Potential difference is the change in energy of a charged particle divided by its charge.


12. In a pendulum or spring - what are the displacement - velocity - PES - and K at maximum displacement?
The electron
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.
Work is the change in kinetic energy. Work transfers energy to and from a body
A1v1=a2v2


13. What is force times the parallel diplacement?
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.
Work
Provided experimental proof of the wave property of light.
2(pi)R/T ...Circumference/Period


14. Mathematically what does centripetal force represent and how is centripetal force calculated?

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15. What causes resistance?
Obstacles in the path of the flow of charges.
The light travels through the image.
Convex
Moment arm


16. What is transmutation?
N•m
Change in voltage across the resistor or capacitor.
It is when a nucleon changes properties. Like a neutron changing into a proton.
Work is the change in kinetic energy. Work transfers energy to and from a body


17. How do you find the number of neutrons in an atom?
N/C
Atomic mass number minus atomic number.
Entropy always increases.
Q=0 because thermal energy is not transfered between the system and its surroundings


18. What is the difference between a motor and a generator?
W = KE:final - KE:initial
(n1)sin(theta1) = (n2)sin(theta2)
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
They fall - vertically - the by the same amount in the same time.


19. How does the closed right hand rule work in electromagnetic induction?

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20. What does the term potential difference mean?
Potential difference is the change in energy of a charged particle divided by its charge.
Bends waves around small objects and the interference of waves from a coherent sources.
But placing more obstacles in the path of the charge's flow.
P=IV


21. Formula for the electric force felt by a charged particle in an electric field.
F=qE
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
(mg)sin(angle)
It is the release of photoelectrons released by photons with an energy (E=hf) above the work function.


22. Under what conditions is heat negative?

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23. S.I. unit of flux
The incoming light (electromagnetic wave) has the same frequency as some of the electrons.
Weber
The release of an energetic photon from an overly excited molecule.
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.


24. When are f - p - q - ho - hi - and M positive for mirrors?
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.
m^3/s
When the object is beyond the focus for a concave mirror.
F=Bilsin(theta) ...F=Force (N) - B:=magnetic field (T) - i=current (A) - l=length of wire in the field (m) - theta is the acute angle between the field and current's directions.


25. What is the relationship between voltage - current and resistance?

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26. A ball rolls inside a salad bowl. The ball is released along the top edge and rolls down before climbing to the same height on the opposite side of the bowl. What is the direction of the acceleration of the ball when it at the bottom of the bowl?
The acceleration is towards the center. It is supplied by the normal force and points towards the center.
Torque
How quickly you change velocity.
The movement of charges is the current and it is measures by the number of charges per second at a point.


27. What is the formula relating emf and voltage?
Radio - Infrared - Visible - UltraViolet - X-Rays - Gamma Rays.
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
ROY-G-BIV: Red - Orange - Yellow - Green - Blue - Indigo - Violet
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)


28. Formula for the potential difference of a point charge as compared to infinity.
V=kq/R
Power ... Power equals the change in energy over time.
Lost kinetic energy is work. It is calculated from Fd or KE:final - KE:initial
DU = Q+W ...dU:of the environment = Q:from the environment + W:by the environment


29. What is heat?
'q' is a single particle's charge and 'Q' is the sum of all the charges. Q=q1+q2+q3+q4...
The transfer of thermal energy
The charge on each capacitor.
The movement of charges is the current and it is measures by the number of charges per second at a point.


30. S.I. unit of magnetism
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
The bending of light
A change in the gas' temperature.
Tesla


31. What are the differences and similarities between transverse and longitudinal waves?

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32. What force is always present - and what is its equation?
ZERO
Impulse
Lenses that are fatter in the middle than on the edges.
Weight ...w=mg


33. What is Huygen's Principle?
Weber
Every point on a wave front is a secondary source.
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.
Diverging lenses have a negative focal length.


34. Electric force felt by a charge due to another charge.
The velocity is positive
2(pi)R/T ...Circumference/Period
F=kq1q2/R^2
The higher the temperature the higher the resistance. They are proportional to each other.


35. What is the area under the velocity time graph?
Displacement
Electric potential is the potential energy associated with the electric force F=qE
Break it up into x and y components using trig - add up the components.
E=hf=hc/(wavelength)


36. What is meant by the terms system and environment?
system is the gas being studied. Environment is the surroundings outside the gas.
PV=nRT and PV=kT
The velocity is positive
Newton


37. What quantity stays the same for resistors in series?
V=kq/R
Work of a system is equal to 1-Qc/Qh
Current stays the same for resistors in series.
The longer the length of wire - the higher the resistance.


38. What comprises gamma decay?
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
E=kq/R^2
The release of an energetic photon from an overly excited molecule.
Impulse


39. A ball rolls inside a salad bowl. The ball is released along the top edge and rolls down before climbing to the same height on the opposite side of the bowl. What is the direction of the acceleration of the ball when it at the top edge of the bowl?
Concave
Broad bright spot in the middle and alternating dark and light spots to the sides.
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.
(rho)gh


40. Unit of electric field
N/C
(1) Bounced off the vertex. (2) Parallel the through the focus. (3) Through the focus and parallel.
Adding the momentum of all the bodies.
The force is perpendicular to the motion. This always results in a curved path. (Open right hand rule)


41. What stays the same for resistors or capacitors in parallel?
E=hf
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.
Lenses that are fatter in the middle than on the edges.
Change in voltage across the resistor or capacitor.


42. When light travels from MORE dense to LESS dense mediums - how does the refracted ray bend in relation to the normal line?
the refracted ray bends AWAY from the normal line.
Joule
Radio - Infrared - Visible - UltraViolet - X-Rays - Gamma Rays.
Velocity has a direction and speed does not have direction.


43. What is an indication of a change in the internal energy?

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44. When is the image negative for mirrors?

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

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46. What is impulse?
(mg)sin(angle)
Work is the change in kinetic energy. Work transfers energy to and from a body
Impulse is the change in momentum
KE=Work


47. What do you do with any vector that is not on either the x or y axis?
2(pi)R/T ...Circumference/Period
E=hf
Potential energy stored in gravity (PE = mgh)
Break it up into x and y components using trig - add up the components.


48. What two entities comprise a vector?
Magnitude and direction
Reflection is the bouncing of waves. Refraction is the bending of waves. Diffraction bends waves around small objects and causes interference from a coherent sources.
Sum of all the energy forms before a condition equals the sum of all the energy forms after the condition.
According to Coulomb's Law - the new force is 6/4 times the old charge.


49. How is the magnitude of the force on a current carrying wire calculated?

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50. What is the strong force?
Newton
Watt
THe force that holds the nucleus together.
Work of a system is equal to 1-Qc/Qh