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          Jeopardy
             Round Two
 Simple
           Sound   Light   Optics   Electricity
Machines
  100      100     100      100        100

  200      200     200      200        200


  300      300     300      300        300


  400      400     400      400        400


  500      500     500      500        500
          Simple Machines 100
• Which simple machine is missing from the
  list below?
  –   lever
  –   pulley
  –   screw
  –   wheel and axle
  –   wedge
                       inclined plane
           Simple Machines 200
•    How does a simple machine make work
     easier?
    a.   changes the size or direction of the force
    b.   multiplies the work
    c.   decreases the amount of time it takes
    d.   reduces the distance you have to apply the
         same amount of force
           Simple Machines 300
•    The number of times a machine multiplies
     a force is called
    a.   efficiency
    b.   mechanical advantage
    c.   work input
    d.   work output
        Simple Machines 400
• A mover pushes with 600 N of force to
  move a heavy (90kg) couch up a ramp into
  a moving truck, which is 2.5 meters above
  the ground. The ramp itself is 4 meters
  long.
  – What is the ideal mechanical advantage of this
    simple machine?
                   1.6
        Simple Machines 500
• A mover pushes with 600 N of force to
  move a heavy (90kg) couch up a ramp into
  a moving truck, which is 2.5 meters above
  the ground. The ramp itself is 4 meters
  long.
  – What is the efficiency of this simple machine?


                   92%
                  Sound 100
•    Speed of a sound wave depends on
    a.   frequency
    b.   wavelength
    c.   medium
    d.   velocity
                   Sound 200
•    Compared to a sound of 30 dB, a sound
     of 70 dB is
    a.   10 times louder
    b.   40 times louder
    c.   1,000 times louder
    d.   10,000 times louder
                   Sound 300
•    Resonance occurs when
    a. two slightly different frequencies are heard at
       the same time.
    b. an object is forced to vibrate at its natural
       frequency.
    c. amplitude increases.
    d. speed of a sound increases when traveling
       from one medium into another.
              Sound/Light 400
•    What is an incandescent object?
    a. Light can pass through it, but images are not
       clear (like wax paper).
    b. It can only reflect light, it does not allow light
       to pass through it at all.
    c. It can only be seen with a black light.
    d. It emits light when it is heated.
                   Sound 500
•    A tuning fork with a frequency of 150 Hz
     will resonate if a sound striking it has a
     frequency of
    a.   150 Hz or 300 Hz
    b.   150 Hz only
    c.   75 Hz or 150 Hz
    d.   None of the above
                   Light 100
•    Adding red light and green light together
     will make
    a.   blue
    b.   yellow
    c.   cyan
    d.   magenta
                      Light 200
•    What about a wave determines color?
    a.   speed
    b.   amplitude
    c.   wavelength
    d.   frequency
                      Light 300
•    Looking at a penny in a cup full of water,
     the penny will appear
    a.   darker in color than it actually is.
    b.   lighter in color than it actually is.
    c.   deeper than it actually is.
    d.   shallower than it actually is.
                   Light 400
•    A person is wearing a yellow sweater…
     on the negative of a picture of this person,
     the sweater would be
    a.   yellow
    b.   magenta
    c.   green
    d.   blue
    e.   cyan
                  Light 500
•    The critical angle for a transparent
     material in air is 30°. The index of
     refraction of the material is most nearly
    a.   0.33
    b.   0.50
    c.   1.0
    d.   1.5
    e.   2.0
                  Optics 100
•    When one uses a magnifying glass to read
     fine print, one uses a
    a. Converging lens to produce a virtual image of
       the print.
    b. Converging lens to produce a real image of
       the print.
    c. Mirror to produce a virtual image of the print.
    d. Diverging lens to produce a real image of the
       print.
    e. Diverging lens to produce a virtual image of
       the print.
                   Optics 200
•    An object is placed as shown in the figure.
     The center of curvature C and the focal
     point F of the reflecting surface are
     marked. As compared with the object, the
     image formed by the reflecting surface is
    a.   Upright and larger
    b.   Upright and the same size
    c.   Upright and smaller           C   F
    d.   Inverted and larger
    e.   Inverted and smaller
                    Optics 300
•    An object placed 3cm in front of a convex
     mirror that has a 12 cm focal length will
     produce an image that is
    a.   upright, smaller, virtual
    b.   upright, larger, virtual
    c.   upright, smaller, real
    d.   inverted, smaller, real
    e.   inverted, larger, real
                 Optics 400
•   People who are farsighted will need to
    wear which type of lens?
    a. concave
    b. convex
    c. concave and convex
                 Optics 500
• A 5 cm tall candle is 15 cm in front of a
  convex lens whose focal length is 20 cm.
  – What is the height of the image?
  – Is this a real or a virtual image?




                    20 cm, virtual
                 Electricity 100
•    Which type of particles exert forces?
    a.   protons
    b.   neutrons
    c.   electrons
    d.   both a) and b)
    e.   both a) and c)
                 Electricity 200
•    What must be true in a circuit for
     electricity to flow?
    a.   It must be a parallel circuit.
    b.   It must be a series circuit.
    c.   It must be a closed circuit.
    d.   It must be an open circuit.
                    Electricity 300
•    In what type of circuit do electrons have
     more than one path to follow?
    a.   AC
    b.   DC
    c.   Series
    d.   Parallel
           Electricity 400
• What is Ohm’s Law?



                V = IR
             Electricity 500
• If you plug a lamp, which has a resistance
  of 20 Ω, into the wall, what is the current
  flowing through the lamp?


                    6.0A
                 YIKES!!

                    http://www.coolquiz.com/trivia/explain/docs/images/electric.gif

				
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