Electric Generators for Emergency Power

Please help science?

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1. ____ is rate of change of position. (1 point)
Speed
Velocity
Acceleration
Displacement
2. The unit of force is ____. (1 point)
m/s
the hertz
the joule
the newton
3. When two birds are pulling on a worm and the worm moves toward the first bird, you know that the foces are ____. (1 point)
long-range
action-reaction
unbalanced
balanced
4. A planet is discovered that is the same size as Earth and has the same gravitational acceleration, but has twice the mass. If you weigh 700 N on Earth, on the new planet you would weigh ____. (1 point)
350 N
700 N
1,400 N
2,800 N
5. Every force has a(n) ____ force.
(1 point)
reaction
long-range
opposite
accelerating
6. You throw a ball into the air. As the ball leaves your hand, the force(s) acting on it is/are ____. (1 point)
gravity
your hand
balanced
gravity and your hand
7. A blimp flying around over the Super Bowl has ____ energy. (1 point)
kinetic and potential
kinetic and chemical
potential and radiant
kinetic and electrical
8. A green plant has ____ energy. (1 point)
electrical
kinetic
chemical
thermal
9. In every energy transformation, some energy is always "lost" as ____ energy. (1 point)
chemical
radiant
electrical
thermal
10. In a nuclear power plant, nuclear energy is first changed to ____ energy. (1 point)
electrical
thermal
chemical
radiant
11. Most plants use a ____ to turn a generator. (1 point)
turbine
motor
photovoltaic
engine
12. A limiting factor for using nuclear energy is the ____ produced. (1 point)
flooding
pollution
waste
heat
13. ____ is a fossil fuel. (1 point)
Gasoline
Water
Electricity
Nuclear fuel
14. ____ is an alternative resource. (1 point)
Coal
Natural gas
Wind
Oil
15. Compare and contrast distance and displacement. (3 points)

16. If you run three laps around a circular race track at 5 m/s, what do you know about your speed, velocity, and acceleration? (3 points)

17. 0.30 s after seeing a puff of smoke rise from the starter’s pistol, the sound of the firing of the pistol is heard by the track timer 100 m away. What is the speed of sound? (5 points)

18. In figure 24-1, a rubber ball is dropped and bounces back up. What kind of energy does the ball have at points A, B, and C? (3 points)

19. List two advantages and two disadvantages of fossil fuels. (4 points)

1. velocity
2. newtons
3. unbalanced?
4. 700 N
5. opposite
6. gravity
7. kinetic and potential
8. chemical
9. thermal?
10. chemical
11. turbine
thats all i know

2 Responses to “Please help science?”

1. Ashley N Says:
   May 7th, 2008 at 4:55 pm

   1. velocity
   2. hertz
   3. unbalanced
   4. 700 N
   5. opposite
   7. kinetic and chemical
   8. chemical
   11. turbine
   References :

2. lilaznoreo Says:
   May 7th, 2008 at 5:19 pm

   1. velocity
   2. newtons
   3. unbalanced?
   4. 700 N
   5. opposite
   6. gravity
   7. kinetic and potential
   8. chemical
   9. thermal?
   10. chemical
   11. turbine
   thats all i know
   References :

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