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. The 'V' is (rho)Vg
g=zero so h=(Vyo)t
The volume under water
(rho)gh
Only 1/2 a wavelength fits in the tube. L=wavelength/2


2. What is the horizontal acceleration of projectiles?
The release of a particle or photon from an UNSTABLE nucleus.
m^3/s
ZERO
Concave


3. What do the period of pendulums and springs each depend on?
Pendulums depend on the length of the arm and the pull of gravity. springs depend on mass and the spring constant.
E=V/d
Heat - (the 'Q' variable) - is NEGATIVE when thermal energy is being REMOVED from a system.
The transfer of thermal energy


4. What is the energy equation if a force (friction) through a distance results in heat and thus a change in temperature?
The release of a Helium nuclei - 4 -2 He2+
KE=Work
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
Tesla


5. What equation describes the speed in the y-direction of a projectile 't' seconds after it started moving?
Initial velocity
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.
Vy=Vyo + gt ...Watch the signs.
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.


6. S.I. unit of work
The acceleration is towards the center. It is supplied by the normal force and points towards the center.
The measure of the average kinetic energy of the molecules.
The graph of force vs displacement
Joule


7. When are f - p - q - ho - hi - and M positive for mirrors?
P=IV
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.
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.
When the object is beyond the focus for a concave mirror.


8. What is the relationship between energy - frequency - and wavelength in any wave?
Potential difference is the change in energy of a charged particle divided by its charge.
It is the release of photoelectrons released by photons with an energy (E=hf) above the work function.
E=hf=hc/(wavelength)
The release of a Helium nuclei - 4 -2 He2+


9. What kind of mirror has a positive focus?
The thicker the wire - the lower the resistance.
How quickly you change velocity.
Concave
The particle travels in a circle. Radius=momentum/qB


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

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11. What is the difference between reflection - refraction - and diffraction?
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.
Transverse waves: The displacement is perpendicular to the wave's motion. Longitudinal waves: The displacement is in the direction of the wave's motion.
Vertical direction
Work done 'BY' the gas.


12. What is the order of the electromagnetic spectrum?
The CHANGE in 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.
The velocity is positive
Radio - Infrared - Visible - UltraViolet - X-Rays - Gamma Rays.


13. Which kind of mirror always has a virtual image?
Work is positive when the force and displacement point in the same direction.
The particle travels in a circle. Radius=momentum/qB
The release of a particle or photon from an UNSTABLE nucleus.
Convex


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

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15. Formula for the electric field at point in space for a single point charge.
E=kq/R^2
The velocity is positive
x=Vo + ((1/2)g)sin(angle)t^2
The electric field forces charges to move.


16. What is force times the parallel diplacement?
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.
(1) Straight through the vertex. (2) Parallel then through the primary focus.
Work
The bouncing of light


17. How does the speed change when the pressure is decreased?
Speed ups
Transverse waves: The displacement is perpendicular to the wave's motion. Longitudinal waves: The displacement is in the direction of the wave's motion.
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.
Work by a system is negative when the gas contracts. (The volume decreases.)


18. S.I. Unit of electric force
Newton
Diverging
Heat - (the 'Q' variable) - is POSITIVE when thermal energy is being ADDED to a system.
Obstacles in the path of the flow of charges.


19. S.I. unit of gravitational force
That the orbits of the electrons are like planets around the Sun.
Newton
Transverse waves: The displacement is perpendicular to the wave's motion. Longitudinal waves: The displacement is in the direction of the wave's motion.
x=(1/2)at^2 Remember - the word 'dropped' implies no initial velocity.


20. What is internal energy?
Force lifting a body when it is in a fluid.
The motion of the molecules in gas.
Joule
Work by a system is negative when the gas contracts. (The volume decreases.)


21. What is the binding energy?
The energy required to remove an electron or nucleon from a molecule.
Potential difference is the change in energy of a charged particle divided by its charge.
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.
kg•m/s


22. How does impulse relate to force?
Impulse is (force)(time)
Diverging lenses have a negative focal length.
frequency (Think of the color as not changing.)
Atmospheric pressure


23. The speed of a ball when it lands at the same height it was thrown from.
Longitudinal Wave: Sound wave - Transverse Wave: Light wave - 'The Wave' in a a crowd at a porting event.
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.
Open right hand rule
Initial velocity


24. Average kinetic energy of an ideal gas's SINGLE molecule.
When a body is moving at a constant velocity or not moving at all.
Initial velocity
Vx=(Vxo)t ...Recall that there is no acceleration in the horizontal direction.
KE = (3/2)kT


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

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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)
x=(1/2)at^2 Remember - the word 'dropped' implies no initial velocity.
Heat - (the 'Q' variable) - is NEGATIVE when thermal energy is being REMOVED from a system.
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


27. S.I. unit of frictional force
Atomic number is the number of protons. Atomic mass number is the number of nucleons - (protons and neutrons.)
the refracted ray bends TOWARDS the normal line.
Zero. Because the displacement is perpendicular to the force (centripetal force.)
Newton


28. S.I. unit of magnetism
The higher the temperature the higher the resistance. They are proportional to each other.
The velocity is positive
Tesla
Vertical direction


29. What stays the same for capacitors in series?
The charge on each capacitor.
Displacement
The release of an energetic photon from an overly excited molecule.
Impulse is (force)(time)


30. What is the energy of a photon?

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31. What is electromagnetic induction?
Electromagnetic induction is the generation of an Emf by moving a conductor through a magnetic field. emf=change in flux/dt
That the orbits of the electrons are like planets around the Sun.
Work
Velocity has a direction and speed does not have direction.


32. What is the path of a charged particle in a magnetic field?
The transfer of thermal energy
The particle travels in a circle. Radius=momentum/qB
'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 longer the length of wire - the higher the resistance.


33. S.I. unit of every kind of energy
The motion of the molecules in gas.
It is the net force pointing towards the center.
wave speed = (wavelength)(frequency)
Joule


34. In uniform circular motion - how is tangential velocity calculated?
2(pi)R/T ...Circumference/Period
The nucleus
Joule
DU = Q+W ...dU:of the environment = Q:from the environment + W:by the environment


35. What is the Bohr Model of the atom?
ZERO. Because the force is perpendicular to the displacement . (Open right hand rule.)
The bouncing of light
That the orbits of the electrons are like planets around the Sun.
The Law of reflection states that the incident angle of a wave is equal to the reflected angle.


36. Pressure of an open container at the opening.
Pgh ..thats ('rho')(gravity's acceleration)(height)
V=kq/R
Atmospheric pressure
Work by a system is negative when the gas contracts. (The volume decreases.)


37. Under what conditions is mechanical work positive?
Work is positive when the force and displacement point in the same direction.
'q' is a single particle's charge and 'Q' is the sum of all the charges. Q=q1+q2+q3+q4...
dU = zero. The change in temperature of the gas is zero.
Zero. Because the displacement is perpendicular to the force (centripetal force.)


38. What comprises alpha radiation?
The force is perpendicular to the motion to get a circular path of motion. (Think about centripetal force.)
The release of a Helium nuclei - 4 -2 He2+
In front of the mirror - in the light.
KE=Work


39. What quantity stays the same for resistors in series?
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.
The centripetal force points along the radius towards the center of the circle.
(Cross-sectional Area)(Velocity)
Current stays the same for resistors in series.


40. When is sum of force (net force) zero?
The acceleration is towards the center. It is supplied by the normal force and points towards the center.
When a body is moving at a constant velocity or not moving at all.
Electromagnetic induction is the generation of an Emf by moving a conductor through a magnetic field. emf=change in flux/dt
Torque


41. Work is the area under which curve?
velocity
According to Coulomb's Law - the new force is 6/4 times the old charge.
The graph of force vs displacement
Light must travel from more to less dense so the refracted ray can bend away from the normal.


42. When is the image negative for a lens?
When it is on the same side as the image?
Joule
Concave
The centripetal force is the net force. It's magnitude is calculated from F=ma where 'a' is the centripetal force.


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

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44. How do you find the number of neutrons in an atom?
Weber
Impulse is (force)(time)
Atomic mass number minus atomic number.
Vertical direction


45. How are velocity and speed different?
That the orbits of the electrons are like planets around the Sun.
Velocity has a direction and speed does not have direction.
E=hf
Convex


46. Define Snell's law.
(n1)sin(theta1) = (n2)sin(theta2)
When a body is moving at a constant velocity or not moving at all.
When the object is beyond the focus for a concave mirror.
Joule


47. How is the force on a charged particle in a magnetic field creating the path calculated?
Provided experimental proof of the wave property of light.
The transfer of thermal energy
Sum of all the energy forms before a condition equals the sum of all the energy forms after the condition.
The force is perpendicular to the motion. This always results in a curved path. (Open right hand rule)


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

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49. What did Rutherford discover?
(1) Straight through the vertex. (2) Parallel then through the primary focus.
E=hf ...E=energy of a single photon (J) - h = Plank's constant - f=frequency (Hz)
The nucleus
The bouncing of light


50. Under what conditions is heat negative?

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