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. S.I. unit of momentum
Sum of the torques equal zero.
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.
kg•m/s
An adiabatic process is where no thermal energy is transfered between the system and its surroundings.


2. When is sum of force (net force) NOT zero?

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3. Gauge Pressure

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4. Buoyancy
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
Force lifting a body when it is in a fluid.
Work of a system is equal to 1-Qc/Qh


5. What do the period of pendulums and springs each depend on?
F=kq1q2/R^2
frequency (Think of the color as not changing.)
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.
They fall - vertically - the by the same amount in the same time.


6. What shape is a diverging mirror?
convex mirrors are diverging mirrors.
(Cross-sectional Area)(Velocity)
Adding the momentum of all the bodies.
Force= Pressure/Area


7. Under what conditions is mechanical work positive?
KE = (3/2)kT
Open right hand rule
Transverse waves: The displacement is perpendicular to the wave's motion. Longitudinal waves: The displacement is in the direction of the wave's motion.
Work is positive when the force and displacement point in the same direction.


8. What quantity ADDS for resistors in series?
The force is perpendicular to the motion. This always results in a curved path. (Open right hand rule)
frequency (Think of the color as not changing.)
Watt
Resistance: R=R1+R2+R3+...


9. What is mass energy equivalence?
Energy and mass are equated by E=mc^2.
When a body's speed is changing.
DU = Q+W ...dU:of the environment = Q:from the environment + W:by the environment
Bends waves around small objects and the interference of waves from a coherent sources.


10. Formula for work as a charged particle travels across two charged plates
Convex
ZERO. Because the force is perpendicular to the displacement . (Open right hand rule.)
W=qV
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.


11. What doesn't change (speed - frequency - or wavelength) - when light moves from one medium to another?
Work is the change in kinetic energy. Work transfers energy to and from a body
frequency (Think of the color as not changing.)
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.
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.


12. How does impulse relate to force?
Impulse is (force)(time)
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
A displacement must occur. ( W=Fd)
How quickly you change velocity.


13. What does the term potential difference mean?
The bending of light
Potential difference is the change in energy of a charged particle divided by its charge.
Converging lenses have a positive focal length.
frequency (Think of the color as not changing.)


14. What kind of image do you get when the object is placed at the focus?
Work by a system is positive when the gas expands. (The volume increases.)
The charge on each capacitor.
No image.
The CHANGE in velocity.


15. S.I. unit of magnetism
N/C
Tesla
Q=0 because thermal energy is not transfered between the system and its surroundings
Torque


16. What is the difference between emf and voltage?
Weber
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.
Newton
2(pi)R/T ...Circumference/Period


17. What is the component of 'mg' parallel to a slope?
(mg)sin(angle)
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.
Conservation of Energy ... because E=hf
Ohm's Law: V=IR


18. S.I. unit of flux
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.
When it is on the 'dark' side of the mirror. Opposite the light.
Force lifting a body when it is in a fluid.
Weber


19. S.I. unit of work
Weight ...w=mg
Joule
G(M:earth)/r^2 ...force of gravity = G(M:earth)(M:body)/r^2
dU = zero. The change in temperature of the gas is zero.


20. What is the impact on the first law of thermodynamics for an isothermal process?
The release of an electron and antineutrino or the release of a positron and a neutrino.
dU = zero. The change in temperature of the gas is zero.
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.
N•m


21. What is an isotope?
velocity
Same number of protons by a different number of neutrons. e.g. Carbon-12 versus Carbon-14
The nucleus
ZERO


22. Under what conditions is heat positive?

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23. What is the energy equation if a force (friction) through a distance results in heat and thus a change in temperature?
wave speed = (wavelength)(frequency)
The incoming light (electromagnetic wave) has the same frequency as some of the electrons.
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.
KE=Work


24. What is the binding energy?
Impulse
The particle travels in a circle. Radius=momentum/qB
The energy required to remove an electron or nucleon from a molecule.
Dark in the middle and alternating light and dark spots after that.


25. Unit of electric field
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.
V=kq/R
N/C
How quickly you change velocity.


26. 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)
The refracted light ray is bent 90°. (Parallel to the interface surface.)
Electromagnetic induction is the generation of an Emf by moving a conductor through a magnetic field. emf=change in flux/dt
The velocity is positive


27. Pressure of an open container at the opening.
F=qE
Atmospheric pressure
kg•m/s
The release of a Helium nuclei - 4 -2 He2+


28. What is the difference between a motor and a generator?
V=kq/R
(mg)sin(angle)
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
The release of a particle or photon from an UNSTABLE nucleus.


29. In a pendulum or spring - what are the displacement - velocity - PES - and K at maximum displacement?
Impulse is (force)(time)
When it is on the same side as the image?
Weight ...w=mg
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.


30. What does upward slope on a displacement versus time graph imply about the velocity.
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.
E=hf
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.
The velocity is positive


31. What is the derived equation for the electric field in terms of q and r^2 ?

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32. Which kind of mirror always has a virtual image?
The measure of the average kinetic energy of the molecules.
When the object is beyond the focus for a concave mirror.
It is the time for 1/2 a substance to decay by radioactive processes.
Convex


33. What is the electric field's magnitude inside of a container made from an electrical CONDUCTOR?
Alpha
Zero.
ZERO
When a body is moving at a constant velocity or not moving at all.


34. How do you find the number of neutrons in an atom?
The centripetal force is the net force. It's magnitude is calculated from F=ma where 'a' is the centripetal force.
Joule
Convex
Atomic mass number minus atomic number.


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

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36. What is acceleration?
The electric force (Coulomb's Law) can attract and repel and it depends on charge. Universal Gravity depends on mass and always attracts.
Concave mirrors are converging mirrors.
Vy=Vyo + gt ...Watch the signs.
How quickly you change velocity.


37. What is the derived equation for the ACCELERATION of gravity in terms of m and 'r' squared?
E=hf=hc/(wavelength)
G(M:earth)/r^2 ...force of gravity = G(M:earth)(M:body)/r^2
Only 1/2 a wavelength fits in the tube. L=wavelength/2
It is when a nucleon changes properties. Like a neutron changing into a proton.


38. In a pendulum or spring - what are the displacement - velocity - PE and KE at the equilibrium position?
m^3/s
Newton
The thicker the wire - the lower the resistance.
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.


39. What is the energy equation if you see a height difference between two points in the problem?
Potential energy stored in gravity (PE = mgh)
Heat - (the 'Q' variable) - is NEGATIVE when thermal energy is being REMOVED from a system.
An adiabatic process is where no thermal energy is transfered between the system and its surroundings.
When it is on the same side as the image?


40. What is the area under any PV curve?

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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 bottom of the bowl?
When it is on the 'dark' side of the mirror. Opposite the light.
The incoming light (electromagnetic wave) has the same frequency as some of the electrons.
V=kq/R
The acceleration is towards the center. It is supplied by the normal force and points towards the center.


42. How can you tell when an engine is a Carnot Engine?

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43. What does the pattern look like in a Young's Double Slit diffraction pattern?
Energy and mass are equated by E=mc^2.
Dark in the middle and alternating light and dark spots after that.
(n1)sin(theta1) = (n2)sin(theta2)
The transfer of thermal energy


44. Unit that means the same thing as Nm
Impulse is the change in momentum
Lenses that are thinner in the middle than on the edges.
Joule
Work is positive when the force and displacement point in the same direction.


45. Formula for the electric field between a pari of charged plates.
Potential energy stored in gravity (PE = mgh)
E=V/d
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.
The release of an electron and antineutrino or the release of a positron and a neutrino.


46. Under what conditions is work by a system ( gas) positive?
Newton
The body is moving at a constant velocity
Work by a system is positive when the gas expands. (The volume increases.)
the refracted ray bends TOWARDS the normal line.


47. What do you do with any vector that is not on either the x or y axis?
E=hf ...E=energy of a single photon (J) - h = Plank's constant - f=frequency (Hz)
Break it up into x and y components using trig - add up the components.
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.
Lenses that are fatter in the middle than on the edges.


48. When are f - p - q - ho - hi - and M positive for mirrors?
Alpha - Beta - and Gamma
Concave
It is the net force pointing towards the center.
When the object is beyond the focus for a concave mirror.


49. What do batteries and generators produce?
It is used in Lenz's Law to determine the change in flux of a conductor.
(rho)gh
A potential difference and a flow and energized charges.
Joule


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

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