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. How is sum of force (net force) depicted in a free body diagram?
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.
Impulse is the change in momentum
(1) Bounced off the vertex. (2) Parallel the through the focus. (3) Through the focus and parallel.
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.


2. S.I. unit of gravitational force
Newton
The force is perpendicular to the motion to get a circular path of motion. (Think about centripetal force.)
Potential energy stored in gravity (PE = mgh)
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.


3. Under what conditions is heat negative?

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4. Pressure of an open container at the opening.
Atmospheric pressure
Concave
Work of a system is equal to 1-Qc/Qh
The electric force (Coulomb's Law) can attract and repel and it depends on charge. Universal Gravity depends on mass and always attracts.


5. When is the image negative for a lens?
Concave mirrors are converging mirrors.
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.
When it is on the same side as the image?
The refracted light ray is bent 90°. (Parallel to the interface surface.)


6. How does a wires composition effect resistance?

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7. Which kind of mirror always has a virtual image?
Convex
ZERO
Concave mirrors are converging mirrors.
Transverse waves: The displacement is perpendicular to the wave's motion. Longitudinal waves: The displacement is in the direction of the wave's motion.


8. What is the photoelectric effect?
Convex
Lenses that are fatter in the middle than on the edges.
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.
It is the release of photoelectrons released by photons with an energy (E=hf) above the work function.


9. How does impulse relate to force?
When the body rests on a surface.
Lenses that are thinner in the middle than on the edges.
Current stays the same for resistors in series.
Impulse is (force)(time)


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

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11. What is the area under any PV curve?

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

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13. What conservation law dictates that the frequency of light cannot change as it travels between mediums?
Torque
Magnitude and direction
The graph of force vs displacement
Conservation of Energy ... because E=hf


14. Which kind of mirror can show a real image?
The velocity is positive
g=zero so h=(Vyo)t
The CHANGE in velocity.
Concave


15. What is the name given to the distance between the pivot point and applied perpendicular force?
The force is perpendicular to the motion to get a circular path of motion. (Think about centripetal force.)
Joule
Moment arm
Velocity has a direction and speed does not have direction.


16. What is an isotope?
(Cross-sectional Area)(Velocity)
(1) The image is larger than the object: ho>hi. (2) image is upright.
Diverging
Same number of protons by a different number of neutrons. e.g. Carbon-12 versus Carbon-14


17. What is the component of 'mg' parallel to a slope?
Provided experimental proof of the wave property of light.
Ohm's Law: V=IR
Radio - Infrared - Visible - UltraViolet - X-Rays - Gamma Rays.
(mg)sin(angle)


18. What is mass energy equivalence?
Every point on a wave front is a secondary source.
Parallel. Because the plates are shared.
Energy and mass are equated by E=mc^2.
The electric force (Coulomb's Law) can attract and repel and it depends on charge. Universal Gravity depends on mass and always attracts.


19. How is a force's direction oriented compared to a bodies direction of motion to get a circular (curved) path of motion?
The centripetal force points along the radius towards the center of the circle.
kg•m/s
That the orbits of the electrons are like planets around the Sun.
The force is perpendicular to the motion to get a circular path of motion. (Think about centripetal force.)


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

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

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22. What is force times the perpendicular distance?
Concave
Only 1/4 wavelength fits in the tube. L=wavelength/4
Torque
V=kq/R


23. What is the relationship between energy - frequency - and wavelength in any wave?
Pgh ..thats ('rho')(gravity's acceleration)(height)
E=hf=hc/(wavelength)
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.
Potential difference is the change in energy of a charged particle divided by its charge.


24. What is the area under the velocity time graph?
Displacement
Velocity has a direction and speed does not have direction.
The volume under water
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.


25. What is implied when an object is not accelerating in the x direction?
Something other than zero.
The body is moving at a constant velocity
Power ... Power equals the change in energy over time.
Initial velocity


26. Work is the area under which curve?
x=Vo + ((1/2)g)sin(angle)t^2
The engine's efficiency is 1-Tc/Th. It is defined by the temperature's in the reservoirs and not the thermal energy flowing from them.
According to Coulomb's Law - the new force is 6/4 times the old charge.
The graph of force vs displacement


27. What does the pattern look like in a Young's Double Slit diffraction pattern?
Radio - Infrared - Visible - UltraViolet - X-Rays - Gamma Rays.
Dark in the middle and alternating light and dark spots after that.
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
E=kq/r^2 This is the electric field's magnitude at a point in space.


28. What happens at the critical angle?
The bouncing of light
Watt
m^3/s
The refracted light ray is bent 90°. (Parallel to the interface surface.)


29. What does upward slope on a displacement versus time graph imply about the velocity.
ZERO. Because the force is perpendicular to the displacement . (Open right hand rule.)
The velocity is positive
A1v1=a2v2
Watt


30. What is the work done on a charged particle by the magnetic field? Why?
ZERO. Because the force is perpendicular to the displacement . (Open right hand rule.)
That the orbits of the electrons are like planets around the Sun.
N•m
the refracted ray bends AWAY from the normal line.


31. Energy of a SINGLE photon
The centripetal force is the net force. It's magnitude is calculated from F=ma where 'a' is the centripetal force.
E=hf
The transfer of thermal energy
2(pi)R/T ...Circumference/Period


32. What is the energy of a photon?

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33. What is the difference between emf and voltage?
PV=nRT and PV=kT
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.
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.
Parallel. Because the plates are shared.


34. Electric force felt by a charge due to another charge.
Current stays the same for resistors in series.
Statistically speaking - energy flows from hot to cold.
Bernoulli's equation - Flow Rate = Volume/time
F=kq1q2/R^2


35. When is sum of force (net force) zero?
W = KE:final - KE:initial
When a body is moving at a constant velocity or not moving at all.
Vx=(Vxo)t ...Recall that there is no acceleration in the horizontal direction.
Impulse is the change in momentum


36. Describe the relationship between Qh - Qc - and W in a heat engine?
Work of a system is equal to 1-Qc/Qh
The incoming light (electromagnetic wave) has the same frequency as some of the electrons.
Pascal
KE=Work


37. How must the mediums light is traveling through be arranged so that the condition for the critical angle can exist?
V - a Joule/Coulomb
Energy and mass are equated by E=mc^2.
Light must travel from more to less dense so the refracted ray can bend away from the normal.
The centripetal force is the net force. It's magnitude is calculated from F=ma where 'a' is the centripetal force.


38. Formula for work as a charged particle travels across two charged plates
Impulse
W=qV
When a body's speed is changing.
PV=nRT and PV=kT


39. What is heat?
The transfer of thermal energy
frequency (Think of the color as not changing.)
Diverging
Resistance: R=R1+R2+R3+...


40. S.I. unit of Flow rate
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
m^3/s
Tesla
Ohm's Law: V=IR


41. 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?
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.
E=hf ...E=energy of a single photon (J) - h = Plank's constant - f=frequency (Hz)
g=zero so h=(Vyo)t
Bends waves around small objects and the interference of waves from a coherent sources.


42. Which kind of mirror cannot magnify an image?
When a body is moving at a constant velocity or not moving at all.
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.
Convex
Something other than zero.


43. How is the centripetal force represented in a free body diagram?
Velocity has a direction and speed does not have direction.
W=qV where 'W' is the work - 'q' is the charge and 'V' is the potential difference measured in Volts.
It is the net force pointing towards the center.
(1) The image is larger than the object: ho>hi. (2) image is upright.


44. How is the direction of the force on a current carrying wire calculated?
When a body is moving at a constant velocity or not moving at all.
The NET work BY a system is the area enclosed in a cycle on a PV diagram.
The centripetal force points along the radius towards the center of the circle.
Open right hand rule


45. Under what conditions is mechanical work negative?
The particle travels in a circle. Radius=momentum/qB
Zero. Because the displacement is perpendicular to the force (centripetal force.)
Work is positive when the force and displacement point in the same direction.
Watt


46. Which type of radiation has the lowest energy?
Converging lenses have a positive focal length.
Joule
Alpha
Work is positive when the force and displacement point in the same direction.


47. What is the horizontal acceleration of projectiles?
(mg)sin(angle)
ZERO
The initial velocity - (Vo in the formulas)
A1v1=a2v2


48. What is the formula relating emf and voltage?
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
Convex
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.
The centripetal force points along the radius towards the center of the circle.


49. S.I. unit of centripetal force
Newton
It is the release of photoelectrons released by photons with an energy (E=hf) above the work function.
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.
Radio - Infrared - Visible - UltraViolet - X-Rays - Gamma Rays.


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

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