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 is the energy equation if a force (friction) through a distance results in heat and thus a change in temperature?
Sum of the torques equal zero.
KE = (3/2)kT
Concave mirrors are converging mirrors.
KE=Work


2. What did Thompson discover?
The electric field forces charges to move.
The electron
Dark in the middle and alternating light and dark spots after that.
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.


3. Unit of energy for electricity.
Convex
V - a Joule/Coulomb
'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.
When a body is moving at a constant velocity or not moving at all.


4. Formula for the electric field between a pari of charged plates.
KE=(3/2)kT where k is Boltzman's constant
(Cross-sectional Area)(Velocity)
How quickly you change velocity.
E=V/d


5. What are the two forms of the ideal gas law?
Only 1/4 wavelength fits in the tube. L=wavelength/4
The motion of the molecules in gas.
PV=nRT and PV=kT
The force is perpendicular to the motion to get a circular path of motion. (Think about centripetal force.)


6. What conditions are necessary to change the reflected ray's phase by 180°?

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7. S.I. unit of frictional force
Newton
Force= Pressure/Area
Bernoulli's equation - Flow Rate = Volume/time
It is when a nucleon changes properties. Like a neutron changing into a proton.


8. What is the difference between elastic and inelastic collisions? State the relevant equations for each.

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9. What is the difference between the variable 'q' and 'Q?'?

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10. S.I. unit of power
2(pi)R/T ...Circumference/Period
(1) Straight through the vertex. (2) Parallel then through the primary focus.
Watt
When the object is beyond the focus for a concave mirror.


11. What does upward slope on a displacement versus time graph imply about the velocity.
The charge on each capacitor.
When it is on the same side as the image?
The velocity is positive
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.


12. What makes an image 'real?'
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.
The transfer of thermal energy
wave speed = (wavelength)(frequency)
The light travels through the image.


13. Which type of lenses have a POSITIVE focal length?
Newton
Zero.
the refracted ray bends TOWARDS the normal line.
Converging lenses have a positive focal length.


14. What is the area under any PV curve?

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15. Average kinetic energy of an ideal gas's SINGLE molecule.
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
But placing more obstacles in the path of the charge's flow.
The motion of the molecules in gas.
KE = (3/2)kT


16. Continuity equation
Joule
Q=0 because thermal energy is not transfered between the system and its surroundings
A1v1=a2v2
Weight ...w=mg


17. What do you know about two objects that are launched at different horizontal velocities?
x=(1/2)at^2 Remember - the word 'dropped' implies no initial velocity.
They fall - vertically - the by the same amount in the same time.
Moment arm
The nucleus


18. What comprises gamma decay?
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.
The transfer of thermal energy
The release of an energetic photon from an overly excited molecule.


19. S.I. unit of every kind of energy
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
In front of the mirror - in the light.
Joule
PV=nRT and PV=kT


20. What kind of capacitor circuit adds to find the total capacitance?
F=kq1q2/R^2
x=Vo + ((1/2)g)sin(angle)t^2
Parallel. Because the plates are shared.
The initial velocity - (Vo in the formulas)


21. What is the area under the acceleration versus time graph?
The nucleus
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.
PV=nRT and PV=kT
The CHANGE in velocity.


22. What is the name given to the distance between the pivot point and applied perpendicular force?
Moment arm
But placing more obstacles in the path of the charge's flow.
W=qV
Kinetic energy is conserved for an elastic collision and not for an inelastic collision. ELASTIC: m1v1 + m2v2 = m1v1'+m1v2': INELASTIC: m1v1 + m2v2 = (m1+m1)v


23. Electric force felt by a charge due to another charge.
Transverse waves: The displacement is perpendicular to the wave's motion. Longitudinal waves: The displacement is in the direction of the wave's motion.
F=kq1q2/R^2
Resistance: R=R1+R2+R3+...
Newton


24. What is mass energy equivalence?
KE=Work
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.
Energy and mass are equated by E=mc^2.
The bending of light


25. What is the direction of the centripetal acceleration?
Newton
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.
Adding the momentum of all the bodies.
The centripetal acceleration points along the radius towards the center of the circle. (Just like the centripetal force.)


26. What is the derived equation for the ACCELERATION of gravity in terms of m and 'r' squared?
G(M:earth)/r^2 ...force of gravity = G(M:earth)(M:body)/r^2
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.
Speed ups
Vy=Vyo + gt ...Watch the signs.


27. How is tube length and wavelength related for a tube that is opened on both ends?
Only 1/2 a wavelength fits in the tube. L=wavelength/2
THe force that holds the nucleus together.
Same number of protons by a different number of neutrons. e.g. Carbon-12 versus Carbon-14
Joule


28. What does the pattern look like in a Young's Single Slit diffraction pattern?
'q' is a single particle's charge and 'Q' is the sum of all the charges. Q=q1+q2+q3+q4...
Diverging
E=kq/r^2 This is the electric field's magnitude at a point in space.
Broad bright spot in the middle and alternating dark and light spots to the sides.


29. What is force times the parallel diplacement?
DU = Q+W ...dU:of the environment = Q:from the environment + W:by the environment
Work
A change in the gas' temperature.
G(M:earth)/r^2 ...force of gravity = G(M:earth)(M:body)/r^2


30. Define Snell's law.
(n1)sin(theta1) = (n2)sin(theta2)
Electromagnetic wave exits the electrons to a higher orbital. When the electron relaxes - a wavelength of light is given off.
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
Tesla


31. What shape is a diverging lenses?
PV=nRT and PV=kT
Lenses that are thinner in the middle than on the edges.
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.
The refracted light ray is bent 90°. (Parallel to the interface surface.)


32. What kind of image do you get when the object is placed at the focus?
No image.
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
DU = Q+W ...dU:of the environment = Q:from the environment + W:by the environment
Newton


33. What is the horizontal acceleration of projectiles?
Velocity has a direction and speed does not have direction.
Something other than zero.
ZERO
Initial velocity


34. Define Refraction
Diverging lenses have a negative focal length.
PV=nRT and PV=kT
The bending of light
Moment arm


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

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36. What is impulse?
THe force that holds the nucleus together.
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.
Electromagnetic induction is the generation of an Emf by moving a conductor through a magnetic field. emf=change in flux/dt
Impulse is the change in momentum


37. What does the term electric potential energy mean?
V - a Joule/Coulomb
Electric potential is the potential energy associated with the electric force F=qE
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
When a body's speed is changing.


38. What is the Bohr Model of the atom?
That the orbits of the electrons are like planets around the Sun.
m^3/s
Speed ups
Joule


39. What is the strong force?
The electric field forces charges to move.
The refracted light ray is bent 90°. (Parallel to the interface surface.)
the refracted ray bends TOWARDS the normal line.
THe force that holds the nucleus together.


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

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41. How does temperature effect resistance?
Newton
The graph of force vs displacement
The higher the temperature the higher the resistance. They are proportional to each other.
Broad bright spot in the middle and alternating dark and light spots to the sides.


42. What is implied when an object is not accelerating in the y direction?
The thicker the wire - the lower the resistance.
m^3/s
When it is on the same side as the image?
g=zero so h=(Vyo)t


43. What equation describes the distance that a horizontally launched projectile falls t seconds after it started moving?
When it is on the 'dark' side of the mirror. Opposite the light.
W=qV
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.
The force is perpendicular to the motion to get a circular path of motion. (Think about centripetal force.)


44. What equation describes the speed in the y-direction of a projectile 't' seconds after it started moving?
Magnitude and direction
Broad bright spot in the middle and alternating dark and light spots to the sides.
When it is on the 'dark' side of the mirror. Opposite the light.
Vy=Vyo + gt ...Watch the signs.


45. What kind of mirror has a positive focus?
E=V/d
Concave
m=(rho)V
KE=(3/2)kT where k is Boltzman's constant


46. What is electromagnetic induction?
Work by a system is positive when the gas expands. (The volume increases.)
Electromagnetic induction is the generation of an Emf by moving a conductor through a magnetic field. emf=change in flux/dt
Break it up into x and y components using trig - add up the components.
Ohm's Law: V=IR


47. The 'V' is (rho)Vg
Parallel. Because the plates are shared.
The volume under water
ZERO
Weight ...w=mg


48. What are 2 key differences between electric force and gravitational force?

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49. Energy of a SINGLE photon
E=hf
Joule
the refracted ray bends TOWARDS the normal line.
(1) Bounced off the vertex. (2) Parallel the through the focus. (3) Through the focus and parallel.


50. How does the speed change when the pressure is decreased?
Speed ups
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
Displacement
When the object is beyond the focus for a concave mirror.