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 kind of mirror has a positive focus?
Concave
The energy required to remove an electron or nucleon from a molecule.
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
Dark in the middle and alternating light and dark spots after that.


2. What do you do with any vector that is not on either the x or y axis?
In front of the mirror - in the light.
Potential energy stored in gravity (PE = mgh)
Energy and mass are equated by E=mc^2.
Break it up into x and y components using trig - add up the components.


3. What did Thompson discover?
The electron
V=kq/R
Work by a system is negative when the gas contracts. (The volume decreases.)
Electromagnetic induction occurs when a conductor is moved through a magnetic field such that a component of the fields is perpendicular to the current;s direction.


4. S.I. unit of magnetism
Tesla
frequency (Think of the color as not changing.)
No image.
KE=(3/2)kT where k is Boltzman's constant


5. When light travels from MORE dense to LESS dense mediums - how does the refracted ray bend in relation to the normal line?
The thicker the wire - the lower the resistance.
the refracted ray bends AWAY from the normal line.
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.
ROY-G-BIV: Red - Orange - Yellow - Green - Blue - Indigo - Violet


6. What force is always present - and what is its equation?
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.
Weight ...w=mg
KE = (3/2)kT
(n1)sin(theta1) = (n2)sin(theta2)


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

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8. What quantity ADDS for resistors in series?
kg•m/s
Resistance: R=R1+R2+R3+...
Sum of the torques equal zero.
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.


9. Under what conditions is heat negative?

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10. What stays the same for capacitors in series?
The charge on each capacitor.
Vertical direction
ZERO
(1) The image is larger than the object: ho>hi. (2) image is upright.


11. S.I. unit of centripetal force
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.
Newton
ROY-G-BIV: Red - Orange - Yellow - Green - Blue - Indigo - Violet
V=kq/R


12. What is the actual movement of charges - and how is it measured?
The movement of charges is the current and it is measures by the number of charges per second at a point.
(mg)sin(angle)
When the body rests on a surface.
Open right hand rule


13. What is an adiabatic process?
G(M:earth)/r^2 ...force of gravity = G(M:earth)(M:body)/r^2
An adiabatic process is where no thermal energy is transfered between the system and its surroundings.
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
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.


14. What makes an image 'real?'
The light travels through the image.
Electric potential is the potential energy associated with the electric force F=qE
P=IV
Parallel. Because the plates are shared.


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

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16. What is needed for electromagnetic induction to occur?
Electromagnetic induction occurs when a conductor is moved through a magnetic field such that a component of the fields is perpendicular to the current;s direction.
But placing more obstacles in the path of the charge's flow.
Velocity has a direction and speed does not have direction.
KE = (3/2)kT


17. How is the net work of a system (gas) measured?
The NET work BY a system is the area enclosed in a cycle on a PV diagram.
The motion of the molecules in gas.
W=qV where 'W' is the work - 'q' is the charge and 'V' is the potential difference measured in Volts.
But placing more obstacles in the path of the charge's flow.


18. What is the electric field's magnitude inside of a container made from an electrical INSULATOR?
Force= Pressure/Area
Obstacles in the path of the flow of charges.
Something other than zero.
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.


19. How are velocity and speed different?
Concave
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
Velocity has a direction and speed does not have direction.
Pgh ..thats ('rho')(gravity's acceleration)(height)


20. Formula for work by a car that changes speed on a horizontal road.
'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.
W = KE:final - KE:initial
(1) Straight through the vertex. (2) Parallel then through the primary focus.
W=qV


21. In uniform circular motion - how is tangential velocity calculated?
The acceleration is towards the center. It is supplied by the normal force and points towards the center.
2(pi)R/T ...Circumference/Period
E=hf ...E=energy of a single photon (J) - h = Plank's constant - f=frequency (Hz)
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.


22. What is the direction of the centripetal acceleration?
The centripetal acceleration points along the radius towards the center of the circle. (Just like the centripetal force.)
KE=Work
The refracted light ray is bent 90°. (Parallel to the interface surface.)
kg•m/s


23. How is the centripetal force represented in a free body diagram?
Impulse is (force)(time)
It is the net force pointing towards the center.
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.
Q=0 because thermal energy is not transfered between the system and its surroundings


24. Flow Rate
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.
V=Vo + at ...The word 'dropped' means no initial velocity.
(Cross-sectional Area)(Velocity)
The release of a Helium nuclei - 4 -2 He2+


25. What do you know about two objects that are launched at different horizontal velocities?
W = KE:final - KE:initial
W=qV
DU = Q+W ...dU:of the environment = Q:from the environment + W:by the environment
They fall - vertically - the by the same amount in the same time.


26. What is the difference between atomic number and atomic mass number?
The light travels through the image.
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
(n1)sin(theta1) = (n2)sin(theta2)
Initial velocity


27. What does the pattern look like in a Young's Double Slit diffraction pattern?
Dark in the middle and alternating light and dark spots after that.
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.
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.
Magnitude and direction


28. In electrostatics - what takes the place of m and g in the formulae?

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

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30. Formula for the electric force felt by a charged particle in an electric field.
Work by a system is negative when the gas contracts. (The volume decreases.)
F=qE
Dark in the middle and alternating light and dark spots after that.
ZERO. Because the force is perpendicular to the displacement . (Open right hand rule.)


31. What comprises beta radiation?
The acceleration is towards the center. It is supplied by the normal force and points towards the center.
The release of an electron and antineutrino or the release of a positron and a neutrino.
No image.
The force is perpendicular to the motion to get a circular path of motion. (Think about centripetal force.)


32. 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
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
Power ... Power equals the change in energy over time.
Vy=Vyo + gt ...Watch the signs.


33. How does the speed change when the pressure is decreased?
Concave mirrors are converging mirrors.
Impulse is (force)(time)
Speed ups
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.


34. What direction controls time in falling body and projectile motion problems?
Broad bright spot in the middle and alternating dark and light spots to the sides.
Vertical direction
Work of a system is equal to 1-Qc/Qh
The nucleus


35. S.I. unit of work
Joule
V=kq/R
The electron
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


36. How does temperature effect resistance?
Potential energy stored in gravity (PE = mgh)
The higher the temperature the higher the resistance. They are proportional to each other.
frequency (Think of the color as not changing.)
KE=(3/2)kT where k is Boltzman's constant


37. S.I. unit of Flow rate
But placing more obstacles in the path of the charge's flow.
V=Vo + at ...The word 'dropped' means no initial velocity.
Watt
m^3/s


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

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39. What is Huygen's Principle?
The thicker the wire - the lower the resistance.
the refracted ray bends AWAY from the normal line.
Every point on a wave front is a secondary source.
When it is on the same side as the image?


40. What are three ways to increase the capacitance of a capacitor?
Displacement
Ohm's Law: V=IR
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.
Newton


41. How does impulse relate to force?
Impulse is (force)(time)
E=hf ...E=energy of a single photon (J) - h = Plank's constant - f=frequency (Hz)
Energy and mass are equated by E=mc^2.
(1) Straight through the vertex. (2) Parallel then through the primary focus.


42. How can total momentum be calculated?
Adding the momentum of all the bodies.
Work by a system is positive when the gas expands. (The volume increases.)
Work done 'BY' the gas.
Alpha


43. S.I. unit of torque
Joule
V=Vo + at ...The word 'dropped' means no initial velocity.
N•m
m=(rho)V


44. What is the Bohr Model of the atom?
The particle travels in a circle. Radius=momentum/qB
That the orbits of the electrons are like planets around the Sun.
F=qE
The thicker the wire - the lower the resistance.


45. Formula for the electric field between a pari of charged plates.
The longer the length of wire - the higher the resistance.
E=hf ...E=energy of a single photon (J) - h = Plank's constant - f=frequency (Hz)
E=V/d
Only 1/2 a wavelength fits in the tube. L=wavelength/2


46. How is tube length and wavelength related for a tube that is closed on ONE end?
Only 1/4 wavelength fits in the tube. L=wavelength/4
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.
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
the refracted ray bends TOWARDS the normal line.


47. Which kind of mirror always has a virtual image?
Same number of protons by a different number of neutrons. e.g. Carbon-12 versus Carbon-14
Convex
Joule
Work is positive when the force and displacement point in the same direction.


48. What shape is a converging mirrors?
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.
m^3/s
E=hf=hc/(wavelength)
Concave mirrors are converging mirrors.


49. When are f - p - q - ho - hi - and M positive for mirrors?
The NET work BY a system is the area enclosed in a cycle on a PV diagram.
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)
ZERO
When the object is beyond the focus for a concave mirror.


50. What equation describes the speed in the x-direction of a projectile 't' seconds after it started moving?
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.
When the body rests on a surface.
Vx=(Vxo)t ...Recall that there is no acceleration in the horizontal direction.