Instructions:

• Answer 50 questions in 15 minutes.
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• 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 quantity is calculated from slope of the displacement versus time graph?
When a body's speed is changing.
velocity
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.
Diverging


2. What do the period of pendulums and springs each depend on?
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.
The particle travels in a circle. Radius=momentum/qB
It is when a nucleon changes properties. Like a neutron changing into a proton.
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.


3. The speed of a ball when it lands at the same height it was thrown from.
Heat - (the 'Q' variable) - is NEGATIVE when thermal energy is being REMOVED from a system.
Initial velocity
The bouncing of light
x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall.


4. Formula for work by a car that changes speed on a horizontal road.
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
W = KE:final - KE:initial
Obstacles in the path of the flow of charges.
(1) Bounced off the vertex. (2) Parallel the through the focus. (3) Through the focus and parallel.


5. How is the magnitude of the force on a current carrying wire calculated?

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6. What do you do with any vector that is not on either the x or y axis?
Force= Pressure/Area
Break it up into x and y components using trig - add up the components.
When a body's speed is changing.
The thicker the wire - the lower the resistance.


7. What is the 1st law of thermodynamics as applied to gases?
KE=(3/2)kT where k is Boltzman's constant
Force lifting a body when it is in a fluid.
Lenses that are fatter in the middle than on the edges.
DU = Q+W ...dU:of the environment = Q:from the environment + W:by the environment


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

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9. Gauge Pressure

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10. What is the strong force?
THe force that holds the nucleus together.
E=kq/r^2 This is the electric field's magnitude at a point in space.
Transverse waves: The displacement is perpendicular to the wave's motion. Longitudinal waves: The displacement is in the direction of the wave's motion.
Force lifting a body when it is in a fluid.


11. What is the order of the electromagnetic spectrum?
Work is positive when the force and displacement point in the same direction.
Every point on a wave front is a secondary source.
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.
Radio - Infrared - Visible - UltraViolet - X-Rays - Gamma Rays.


12. Force in terms of pressure
A motor uses energy to spin the coils in a magnetic field. A generator spins the coils to create an potential difference.
Weight ...w=mg
Work is positive when the force and displacement point in the same direction.
Force= Pressure/Area


13. Define diffraction
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
Bends waves around small objects and the interference of waves from a coherent sources.
dU = zero. The change in temperature of the gas is zero.
Alpha - Beta - and Gamma


14. S.I. unit of momentum
kg•m/s
E=hf ...E=energy of a single photon (J) - h = Plank's constant - f=frequency (Hz)
Sum of all the energy forms before a condition equals the sum of all the energy forms after the condition.
N/C


15. What did Thompson discover?
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
The centripetal force points along the radius towards the center of the circle.
The electron
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.


16. What is force times the parallel diplacement?
An adiabatic process is where no thermal energy is transfered between the system and its surroundings.
Work
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
Alpha


17. What equation describes the speed in the y-direction of a projectile 't' seconds after it started moving?
Newton
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.
Vy=Vyo + gt ...Watch the signs.
m^3/s


18. What causes resistance?
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
The centripetal force points along the radius towards the center of the circle.
The force is perpendicular to the motion. This always results in a curved path. (Open right hand rule)
Obstacles in the path of the flow of charges.


19. What is the energy of a photon?

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20. What is the difference between reflection - refraction - and diffraction?
Adding the momentum of all the bodies.
Same number of protons by a different number of neutrons. e.g. Carbon-12 versus Carbon-14
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.
Bernoulli's equation - Flow Rate = Volume/time


21. When are f - p - q - ho - hi - and M positive for mirrors?
When the object is beyond the focus for a concave mirror.
Joule
Something other than zero.
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.


22. What two things must be true for a positive magnification?
Light must travel from more to less dense so the refracted ray can bend away from the normal.
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.
(1) The image is larger than the object: ho>hi. (2) image is upright.
E=V/d


23. How is the direction of the force on a current carrying wire calculated?
Open right hand rule
Work by a system is negative when the gas contracts. (The volume decreases.)
Gamma
KE = (3/2)kT


24. How must the mediums light is traveling through be arranged so that the condition for the critical angle can exist?
Ohm's Law: V=IR
THe force that holds the nucleus together.
Light must travel from more to less dense so the refracted ray can bend away from the normal.
Provided experimental proof of the wave property of light.


25. Under what conditions is mechanical work positive?
Lost kinetic energy is work. It is calculated from Fd or KE:final - KE:initial
Zero.
Work is positive when the force and displacement point in the same direction.
Vy=Vyo + gt ...Watch the signs.


26. What is the area under any PV curve?

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27. How does impulse relate to force?
Q=0 because thermal energy is not transfered between the system and its surroundings
Impulse is (force)(time)
The release of a Helium nuclei - 4 -2 He2+
Lenses that are fatter in the middle than on the edges.


28. What is meant by the terms system and environment?
Ohm's Law: V=IR
frequency (Think of the color as not changing.)
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.
system is the gas being studied. Environment is the surroundings outside the gas.


29. Define Refraction
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.
The bending of light
But placing more obstacles in the path of the charge's flow.
Obstacles in the path of the flow of charges.


30. If you have two charges - and you double one charge and triple the other - and move them twice as far apart - what happens to the force of attraction / repulsion between them?

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31. What cause an electromagnetic wave - and what makes the wave propagate indefinitely even in a vacuum?
The centripetal acceleration points along the radius towards the center of the circle. (Just like the centripetal force.)
The release of a Helium nuclei - 4 -2 He2+
wave speed = (wavelength)(frequency)
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.


32. What is implied when an object is not accelerating in the y direction?
Electromagnetic wave exits the electrons to a higher orbital. When the electron relaxes - a wavelength of light is given off.
g=zero so h=(Vyo)t
kg•m/s
Heat - (the 'Q' variable) - is NEGATIVE when thermal energy is being REMOVED from a system.


33. What does upward slope on a displacement versus time graph imply about the velocity.
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.
N•m
Newton
The velocity is positive


34. Describe the relationship between Qh - Qc - and W in a heat engine?
Torque
Potential difference is the change in energy of a charged particle divided by its charge.
Work of a system is equal to 1-Qc/Qh
The graph of force vs displacement


35. S.I. unit of gravitational force
Lenses that are thinner in the middle than on the edges.
The NET work BY a system is the area enclosed in a cycle on a PV diagram.
Newton
(rho)gh


36. What is the path of a charged particle in a magnetic field?
Torque
The light travels through the image.
PV=nRT and PV=kT
The particle travels in a circle. Radius=momentum/qB


37. What stays the same for resistors or capacitors in parallel?
Change in voltage across the resistor or capacitor.
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.
The nucleus
It is the net force pointing towards the center.


38. S.I. unit of power
Watt
The movement of charges is the current and it is measures by the number of charges per second at a point.
Lost kinetic energy is work. It is calculated from Fd or KE:final - KE:initial
Joule


39. What is an object placed when the distance between it and the mirror is positive?
E=hf=hc/(wavelength)
In front of the mirror - in the light.
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.
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


40. What is the y intercept of the velocity time graph?
Weber
The initial velocity - (Vo in the formulas)
Obstacles in the path of the flow of charges.
Work by a system is positive when the gas expands. (The volume increases.)


41. What comprises gamma decay?
The charge on each capacitor.
The release of a Helium nuclei - 4 -2 He2+
The release of an energetic photon from an overly excited molecule.
Ohm's Law: V=IR


42. S.I. unit of frictional force
system is the gas being studied. Environment is the surroundings outside the gas.
Newton
Every point on a wave front is a secondary source.
It is the net force pointing towards the center.


43. How is a force's direction oriented compared to a bodies direction of motion to get a circular (curved) path of motion?
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.
Heat - (the 'Q' variable) - is NEGATIVE when thermal energy is being REMOVED from a system.
Vy=Vyo + gt ...Watch the signs.
The force is perpendicular to the motion to get a circular path of motion. (Think about centripetal force.)


44. What force is always present - and what is its equation?
Weight ...w=mg
Convex
Pgh ..thats ('rho')(gravity's acceleration)(height)
dU = zero. The change in temperature of the gas is zero.


45. What is the energy equation if you see a particle accelerated perpendicular to two charged plates - or the problem states that the particle is accelerated through a potential difference?

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46. What conservation law dictates that the frequency of light cannot change as it travels between mediums?
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
F=kq1q2/R^2
C=kEA/d: Increase the area of the plates - decrease the distance between the plates -and increase the dielectric constant between the plates.
Conservation of Energy ... because E=hf


47. Which type of lenses have a NEGATIVE focal length?
An adiabatic process is where no thermal energy is transfered between the system and its surroundings.
Bends waves around small objects and the interference of waves from a coherent sources.
When it is on the 'dark' side of the mirror. Opposite the light.
Diverging lenses have a negative focal length.


48. Formula for the electric force felt by a charged particle in an electric field.
According to Coulomb's Law - the new force is 6/4 times the old charge.
F=qE
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
velocity


49. Condition for no rotation
Sum of the torques equal zero.
The release of a Helium nuclei - 4 -2 He2+
Bernoulli's equation - Flow Rate = Volume/time
V=E - IR V=terminal voltage (Volts) - E = emf: electromotiveforce (Volts) - IR = Internal drop in energy per charge (Volts)


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

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