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 does upward slope on a displacement versus time graph imply about the velocity.
The velocity is positive
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
According to Coulomb's Law - the new force is 6/4 times the old charge.
Work is positive when the force and displacement point in the same direction.


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

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3. Define Refraction
Work is positive when the force and displacement point in the same direction.
Newton
Initial velocity
The bending of light


4. What kind of capacitor circuit adds to find the total capacitance?
Parallel. Because the plates are shared.
The light travels through the image.
Gamma
The initial velocity - (Vo in the formulas)


5. What is half life?
It is the time for 1/2 a substance to decay by radioactive processes.
Dark in the middle and alternating light and dark spots after that.
Concave
KE = (3/2)kT


6. What is implied when an object is not accelerating in the y direction?
Concave mirrors are converging mirrors.
A1v1=a2v2
When a body's speed is changing.
g=zero so h=(Vyo)t


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

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8. Define diffraction
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
Bends waves around small objects and the interference of waves from a coherent sources.
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.


9. What two things must be true for a positive magnification?
ZERO. Because the force is perpendicular to the displacement . (Open right hand rule.)
(1) The image is larger than the object: ho>hi. (2) image is upright.
Electric potential is the potential energy associated with the electric force F=qE
E=kq/R^2


10. What is implied when an object is not accelerating in the x direction?
Zero.
Energy and mass are equated by E=mc^2.
The body is moving at a constant velocity
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.


11. The 'V' is (rho)Vg
The volume under water
g=zero so h=(Vyo)t
convex mirrors are diverging mirrors.
dU = zero. The change in temperature of the gas is zero.


12. Electric force felt by a charge due to another charge.
F=kq1q2/R^2
Atmospheric pressure
Bernoulli's equation - Flow Rate = Volume/time
The centripetal acceleration points along the radius towards the center of the circle. (Just like the centripetal force.)


13. What is electromagnetic induction?
Radio - Infrared - Visible - UltraViolet - X-Rays - Gamma Rays.
Electromagnetic induction is the generation of an Emf by moving a conductor through a magnetic field. emf=change in flux/dt
The thicker the wire - the lower the resistance.
The centripetal acceleration points along the radius towards the center of the circle. (Just like the centripetal force.)


14. Under what conditions is work by a system ( gas) negative?
The charge on each capacitor.
Converging lenses have a positive focal length.
Work by a system is negative when the gas contracts. (The volume decreases.)
It is an arrow that DOES NOT touch the body. Recall that the net force is the answer when all the forces are added up.


15. State the significance of Young's Experiment.
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
(mg)sin(angle)
Work done 'BY' the gas.
Provided experimental proof of the wave property of light.


16. What kind of image do you get when the object is placed at the focus?
No image.
The NET work BY a system is the area enclosed in a cycle on a PV diagram.
The centripetal acceleration points along the radius towards the center of the circle. (Just like the centripetal force.)
The measure of the average kinetic energy of the molecules.


17. What is the strong force?
THe force that holds the nucleus together.
Statistically speaking - energy flows from hot to cold.
N•m
The motion of the molecules in gas.


18. What is work energy theorem and what is its significance?
x=Vo + ((1/2)g)sin(angle)t^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.
Work is the change in kinetic energy. Work transfers energy to and from a body
Work by a system is negative when the gas contracts. (The volume decreases.)


19. What comprises gamma decay?
Sum of the torques equal zero.
Dark in the middle and alternating light and dark spots after that.
(1) Straight through the vertex. (2) Parallel then through the primary focus.
The release of an energetic photon from an overly excited molecule.


20. How does temperature effect resistance?
The higher the temperature the higher the resistance. They are proportional to each other.
Lost kinetic energy is work. It is calculated from Fd or KE:final - KE:initial
Same number of protons by a different number of neutrons. e.g. Carbon-12 versus Carbon-14
Only 1/2 a wavelength fits in the tube. L=wavelength/2


21. What equation describes the speed of a dropped object 't' seconds after it started moving?

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22. Buoyancy
Provided experimental proof of the wave property of light.
Radio - Infrared - Visible - UltraViolet - X-Rays - Gamma Rays.
Force lifting a body when it is in a fluid.
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.


23. What is the difference between atomic number and atomic mass number?
(1) Straight through the vertex. (2) Parallel then through the primary focus.
Change in voltage across the resistor or capacitor.
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
Entropy always increases.


24. What is the law of reflection?
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.
The graph of force vs displacement
The body is moving at a constant velocity
Newton


25. What is the impact on the first law of thermodynamics for an isothermal process?
m^3/s
Impulse
dU = zero. The change in temperature of the gas is zero.
Sum of the torques equal zero.


26. What is the path of a charged particle in a magnetic field?
Electromagnetic wave exits the electrons to a higher orbital. When the electron relaxes - a wavelength of light is given off.
The particle travels in a circle. Radius=momentum/qB
P=IV
Radio - Infrared - Visible - UltraViolet - X-Rays - Gamma Rays.


27. What cause an electromagnetic wave - and what makes the wave propagate indefinitely even in a vacuum?
The energy required to remove an electron or nucleon from a molecule.
A reflected ray's phase is changes by 180° when the ray is bounced as it tries to travel from a lower to higher index of refraction. It is also changed y 180° when it bounces off of shiny surfaces.
Atmospheric pressure
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.


28. Energy of a SINGLE photon
Sum of all the energy forms before a condition equals the sum of all the energy forms after the condition.
Atomic mass number minus atomic number.
Provided experimental proof of the wave property of light.
E=hf


29. What is the component of 'mg' parallel to a slope?
Newton
Force= Pressure/Area
(mg)sin(angle)
Entropy always increases.


30. What is the relationship that describes the rate that work is done - or that energy is used?
Diverging
Power ... Power equals the change in energy over time.
E=kq/R^2
x=(1/2)at^2 Remember - the word 'dropped' implies no initial velocity.


31. S.I. unit of centripetal force
the refracted ray bends TOWARDS the normal line.
A1v1=a2v2
Newton
m=(rho)V


32. 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?
Q=0 because thermal energy is not transfered between the system and its surroundings
The acceleration is towards the center. It is supplied by the normal force and points towards the center.
Atomic mass number minus atomic number.
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)


33. What is the energy equation for the change in temperature if it results from a loss in KE?

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34. When is the image negative for mirrors?

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35. Continuity equation
A1v1=a2v2
Provided experimental proof of the wave property of light.
Vy=Vyo + gt ...Watch the signs.
Work by a system is negative when the gas contracts. (The volume decreases.)


36. Which type of lenses have a POSITIVE focal length?
It is used in Lenz's Law to determine the change in flux of a conductor.
Converging lenses have a positive focal length.
Torque
ZERO


37. Which kind of mirror always has a virtual image?
x=(1/2)at^2 Remember - the word 'dropped' implies no initial velocity.
Convex
'q' is a single particle's charge and 'Q' is the sum of all the charges. Q=q1+q2+q3+q4...
PV=nRT and PV=kT


38. What forces charges to move?
V=Vo + at ...The word 'dropped' means no initial velocity.
It is the time for 1/2 a substance to decay by radioactive processes.
The electric field forces charges to move.
They fall - vertically - the by the same amount in the same time.


39. What is the photoelectric effect?
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
It is the release of photoelectrons released by photons with an energy (E=hf) above the work function.
Conservation of Energy ... because E=hf
Dark in the middle and alternating light and dark spots after that.


40. What happens at the critical angle?
Obstacles in the path of the flow of charges.
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
The refracted light ray is bent 90°. (Parallel to the interface surface.)
Tesla


41. What does light absorption involve?
The incoming light (electromagnetic wave) has the same frequency as some of the electrons.
Break it up into x and y components using trig - add up the components.
They fall - vertically - the by the same amount in the same time.
Every point on a wave front is a secondary source.


42. What is the relationship between speed - frequency - and wavelength?
Diverging
wave speed = (wavelength)(frequency)
Convex
F=qE


43. What equation describes the speed in the x-direction of a projectile 't' seconds after it started moving?
Convex
Magnitude and direction
The release of an energetic photon from an overly excited molecule.
Vx=(Vxo)t ...Recall that there is no acceleration in the horizontal direction.


44. Formula for the electric field at point in space for a single point charge.
(Cross-sectional Area)(Velocity)
In front of the mirror - in the light.
Magnitude and direction
E=kq/R^2


45. In a pendulum or spring - what are the displacement - velocity - PE and KE at the equilibrium position?
KE = (3/2)kT
Displacement is zero because it is measured from equilibrium position. KE and velocity are at a maximum and it is the lowest point so PE due to gravity is at zero.
The motion of the molecules in gas.
the refracted ray bends AWAY from the normal line.


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

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47. S.I. unit of magnetism
ZERO
(1) The image is larger than the object: ho>hi. (2) image is upright.
The centripetal force points along the radius towards the center of the circle.
Tesla


48. What doesn't change (speed - frequency - or wavelength) - when light moves from one medium to another?
frequency (Think of the color as not changing.)
The PVT conditions change for a gas without changing the temperature.
Dark in the middle and alternating light and dark spots after that.
The initial velocity - (Vo in the formulas)


49. How does the speed change when the pressure is decreased?
PV=nRT and PV=kT
It is an arrow that DOES NOT touch the body. Recall that the net force is the answer when all the forces are added up.
When it is on the same side as the image?
Speed ups


50. What is conservation of energy and what is its significance?
W=qV
Sum of all the energy forms before a condition equals the sum of all the energy forms after the condition.
Zero. Because the displacement is perpendicular to the force (centripetal force.)
Joule