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 the magnitude of the force on a current carrying wire calculated?

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2. Which type of radiation has the lowest energy?
Alpha
x=Vo + ((1/2)g)sin(angle)t^2
The centripetal force is the net force. It's magnitude is calculated from F=ma where 'a' is the centripetal force.
V=kq/R


3. When is sum of force (net force) zero?
kg•m/s
When a body is moving at a constant velocity or not moving at all.
The volume under water
That the orbits of the electrons are like planets around the Sun.


4. What is implied when an object is not accelerating in the x direction?
Initial velocity
N/C
The body is moving at a constant velocity
The release of a Helium nuclei - 4 -2 He2+


5. How much work is the work done on an object moving in a circle? Why?
Zero. Because the displacement is perpendicular to the force (centripetal force.)
ROY-G-BIV: Red - Orange - Yellow - Green - Blue - Indigo - Violet
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.


6. 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 electric force (Coulomb's Law) can attract and repel and it depends on charge. Universal Gravity depends on mass and always attracts.
Moment arm
The acceleration is towards the center. It is supplied by the normal force and points towards the center.
When it is on the 'dark' side of the mirror. Opposite the light.


7. What is internal energy?
wave speed = (wavelength)(frequency)
'q' is a single particle's charge and 'Q' is the sum of all the charges. Q=q1+q2+q3+q4...
The motion of the molecules in gas.
The refracted light ray is bent 90°. (Parallel to the interface surface.)


8. When light travels from MORE dense to LESS dense mediums - how does the refracted ray bend in relation to the normal line?
They fall - vertically - the by the same amount in the same time.
The longer the length of wire - the higher the resistance.
the refracted ray bends AWAY from the normal line.
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.


9. What do the period of pendulums and springs each depend on?
The release of a Helium nuclei - 4 -2 He2+
(mg)sin(angle)
Lenses that are thinner in the middle than on the edges.
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.


10. What is the difference between atomic number and atomic mass number?
Conservation of Energy ... because E=hf
Light must travel from more to less dense so the refracted ray can bend away from the normal.
It is when a nucleon changes properties. Like a neutron changing into a proton.
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)


11. What is force times time?
The centripetal force is the net force. It's magnitude is calculated from F=ma where 'a' is the centripetal force.
Impulse
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
Newton


12. What is impulse?
Impulse is the change in momentum
Only 1/4 wavelength fits in the tube. L=wavelength/4
Open right hand rule
Entropy always increases.


13. What makes an image 'real?'
Speed ups
Parallel. Because the plates are shared.
The light travels through the image.
Pascal


14. What is the strong force?
dU = zero. The change in temperature of the gas is zero.
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.
THe force that holds the nucleus together.
(mg)sin(angle)


15. What is the relationship between power - voltage and current?
The thicker the wire - the lower the resistance.
system is the gas being studied. Environment is the surroundings outside the gas.
P=IV
The CHANGE in velocity.


16. What doesn't change (speed - frequency - or wavelength) - when light moves from one medium to another?
The CHANGE in velocity.
frequency (Think of the color as not changing.)
Force lifting a body when it is in a fluid.
That the orbits of the electrons are like planets around the Sun.


17. What conservation law dictates that the frequency of light cannot change as it travels between mediums?
Conservation of Energy ... because E=hf
Impulse
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
Electromagnetic wave exits the electrons to a higher orbital. When the electron relaxes - a wavelength of light is given off.


18. What is the photoelectric effect?
N•m
Broad bright spot in the middle and alternating dark and light spots to the sides.
Parallel. Because the plates are shared.
It is the release of photoelectrons released by photons with an energy (E=hf) above the work function.


19. Which type of lenses have a POSITIVE focal length?
The energy required to remove an electron or nucleon from a molecule.
They fall - vertically - the by the same amount in the same time.
Converging lenses have a positive focal length.
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


20. What causes resistance?
The force is perpendicular to the motion to get a circular path of motion. (Think about centripetal force.)
E=kq/r^2 This is the electric field's magnitude at a point in space.
Obstacles in the path of the flow of charges.
The release of a Helium nuclei - 4 -2 He2+


21. What shape is a diverging mirror?
Convex
Statistically speaking - energy flows from hot to cold.
convex mirrors are diverging mirrors.
Impulse is the change in momentum


22. Formula for the electric force felt by a charged particle in an electric field.
Newton
Newton
F=qE
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.


23. What is the direction of the centripetal force?
The centripetal force points along the radius towards the center of the circle.
Bernoulli's equation - Flow Rate = Volume/time
How quickly you change velocity.
E=hf ...E=energy of a single photon (J) - h = Plank's constant - f=frequency (Hz)


24. What force is always present - and what is its equation?
W=qV where 'W' is the work - 'q' is the charge and 'V' is the potential difference measured in Volts.
Weight ...w=mg
Displacement
(mg)sin(angle)


25. Define diffraction
Bends waves around small objects and the interference of waves from a coherent sources.
ZERO
g=zero so h=(Vyo)t
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.


26. Which kind of mirror can show a real image?
Joule
Parallel. Because the plates are shared.
ZERO. Because the force is perpendicular to the displacement . (Open right hand rule.)
Concave


27. What is ionization energy and how does it compare to the work function?
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
It is the net force pointing towards the center.
How quickly you change velocity.
Ohm's Law: V=IR


28. Force in terms of pressure
Work
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.
Potential difference is the change in energy of a charged particle divided by its charge.
Force= Pressure/Area


29. What kind of image do you get when the object is placed at the focus?
Lost kinetic energy is work. It is calculated from Fd or KE:final - KE:initial
E=kq/R^2
No image.
Parallel. Because the plates are shared.


30. Which type of lenses have a NEGATIVE focal length?
F=qE
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.
Diverging lenses have a negative focal length.
G(M:earth)/r^2 ...force of gravity = G(M:earth)(M:body)/r^2


31. What does the pattern look like in a Young's Double Slit diffraction pattern?
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.
KE=Work
The force is perpendicular to the motion to get a circular path of motion. (Think about centripetal force.)


32. What are three ways to increase the capacitance of a capacitor?
Adding the momentum of all the bodies.
In front of the mirror - in the light.
ROY-G-BIV: Red - Orange - Yellow - Green - Blue - Indigo - Violet
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.


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

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34. Work is the area under which curve?
Newton
The graph of force vs displacement
Magnitude and direction
dU = zero. The change in temperature of the gas is zero.


35. What is the impact on the first law of thermodynamics for an isothermal process?
dU = zero. The change in temperature of the gas is zero.
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.
Impulse is the change in momentum
Electromagnetic induction is the generation of an Emf by moving a conductor through a magnetic field. emf=change in flux/dt


36. What is the area under any PV curve?

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37. What equation describes the speed in the y-direction of a projectile 't' seconds after it started moving?
Vy=Vyo + gt ...Watch the signs.
A potential difference and a flow and energized charges.
Energy and mass are equated by E=mc^2.
The motion of the molecules in gas.


38. What is the binding energy?
The energy required to remove an electron or nucleon from a molecule.
The NET work BY a system is the area enclosed in a cycle on a PV diagram.
(1) Straight through the vertex. (2) Parallel then through the primary focus.
The longer the length of wire - the higher the resistance.


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

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40. Define mass in terms of density.
convex mirrors are diverging mirrors.
W=qV where 'W' is the work - 'q' is the charge and 'V' is the potential difference measured in Volts.
m=(rho)V
system is the gas being studied. Environment is the surroundings outside the gas.


41. Unit of electric field
ROY-G-BIV: Red - Orange - Yellow - Green - Blue - Indigo - Violet
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
N/C
The graph of force vs displacement


42. Define Snell's law.
The motion of the molecules in gas.
(n1)sin(theta1) = (n2)sin(theta2)
Every point on a wave front is a secondary source.
The centripetal acceleration points along the radius towards the center of the circle. (Just like the centripetal force.)


43. How does the speed change when the pressure is decreased?
Speed ups
When the body rests on a surface.
Diverging lenses have a negative focal length.
It is when a nucleon changes properties. Like a neutron changing into a proton.


44. What quantity stays the same for resistors in series?
Electromagnetic wave exits the electrons to a higher orbital. When the electron relaxes - a wavelength of light is given off.
Current stays the same for resistors in series.
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.
Torque


45. 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?
Resistance: R=R1+R2+R3+...
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.
That the orbits of the electrons are like planets around the Sun.
The particle travels in a circle. Radius=momentum/qB


46. What did Rutherford discover?
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
system is the gas being studied. Environment is the surroundings outside the gas.
'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.
The nucleus


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

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48. What is the formula relating emf and voltage?
KE=Work
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
Work is positive when the force and displacement point in the same direction.


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

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

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