| 5. |
An electric motor accomplishes what task? |
| |
| [removed] |
converts chemical energy into mechanical energy |
| [removed] |
converts electrical energy into electromagnetic energy |
| [removed] |
converts electrical energy into mechanical energy |
| [removed] |
converts mechanical energy into chemical energy |
| [removed] |
converts mechanical energy into electrical energy |
|
The next five questions refer to these electric meters:
|
| |
|
| 15. |
How much electricity was used during the month of June? |
| |
| [removed] |
2813 kwh |
| [removed] |
2582 kwh |
| [removed] |
3011 kwh |
| [removed] |
2903 kwh |
| [removed] |
2744 kwh |
|
|
17.
|
How much would this energy cost the consumer? (assume the average rate of $0.07 per kwh) |
| |
| [removed] |
$203.00 |
| [removed] |
$210.77 |
| [removed] |
$196.91 |
| [removed] |
$188.90 |
| [removed] |
$176.43 |
|
| 18. |
What was the meter reading on June 1? |
| |
| [removed] |
59,301 |
| [removed] |
58,300 |
| [removed] |
58,410 |
| [removed] |
69,411 |
| [removed] |
58,310 |
|
| 19. |
What was the meter reading on July 1? |
| |
| [removed] |
61,134 |
| [removed] |
61,132 |
| [removed] |
61,234 |
| [removed] |
61,123 |
| [removed] |
61,223 |
|
| 20. |
A piece of iron can be made into a permanent magnet by stroking it with a strong magnet. |
| |
| [removed] |
true |
| [removed] |
false |
|
| 10. |
If the frequency of a wave is 5 Hz, how many waves will pass by a stationary object in 1 minute? |
| |
| [removed] |
1/5 |
| [removed] |
5 |
| [removed] |
300 |
| [removed] |
60 |
| [removed] |
1/300 |
|
| 11. |
A submarine captain wishes to know how far away an undersea cliff face is, so he sends out a SONAR signal. After 0.80 seconds, he receives the echo. How far away is the cliff face? |
| |
| [removed] |
1500 m |
| [removed] |
1200 m |
| [removed] |
600 m |
| [removed] |
3000 m |
| [removed] |
2400 m |
|
| |
Use this figure to answer the next 3 questions:
 |
| |
|
| 12. |
On the diagram, which letter represents the amplitude? |
| |
| [removed] |
A |
| [removed] |
B |
| [removed] |
C |
| [removed] |
D |
| [removed] |
E |
|
| 13. |
Which of the letters represents the wavelength? |
| |
| [removed] |
A |
| [removed] |
B |
| [removed] |
C |
| [removed] |
D |
| [removed] |
E |
|
| 14. |
Which position represents the trough? |
| |
| [removed] |
A |
| [removed] |
B |
| [removed] |
C |
| [removed] |
D |
| [removed] |
E
|
|
| 1. |
If a star is moving away from Earth at a high speed, which of the following would astronomers observe? |
| |
| [removed] |
The star’s spectrum would not be shifted at all. |
| [removed] |
The star’s spectrum would be shifted towards red. |
| [removed] |
The star’s spectrum would be shifted towards blue. |
| [removed] |
There is not enough information given to determine.
|
| 5. |
The visible spectrum is made of what types of light? |
| |
| [removed] |
red, orange, yellow, green, blue, violet |
| [removed] |
infrared, red, orange, green, blue, ultraviolet |
| [removed] |
red, orange, yellow, green, blue, ultraviolet |
| [removed] |
radio, infrared, colored light, ultraviolet, x-rays, gamma rays |
|
|
| 10. |
Which of the following has the most energy? |
| |
| [removed] |
x-rays |
| [removed] |
ultraviolet |
| [removed] |
visible light |
| [removed] |
gamma rays |
| [removed] |
infrared |
|
| 11. |
Which of the following best describes the dual nature of light? |
| |
| [removed] |
Light can be thought of as visible colors or as invisible colors. |
| [removed] |
Light can be thought of as being white light or a combination of colored light. |
| [removed] |
Light can be thought of as a mixture of colored light or a mixture of pigments. |
| [removed] |
Light can be thought of as behaving like a particle or like a wave. |
|
| 13. |
What advantage does knowing about the atomic spectrum give astronomers? |
| |
| [removed] |
It helps them predict solar and lunar eclipses. |
| [removed] |
It helps them determine what elements make up stars. |
| [removed] |
It helps them determine the age of the universe. |
| [removed] |
It helps them know what the planets are made of. |
| 15. |
Which of the following has the longest wavelength? |
| |
| [removed] |
infrared |
| [removed] |
visible light |
| [removed] |
gamma rays |
| [removed] |
x-rays |
| [removed] |
ultraviolet |
|
| 16. |
Which of the following scientists did not attempt to calculate the speed of light? |
| |
| [removed] |
Michelson |
| [removed] |
Huygens |
| [removed] |
Galileo |
| [removed] |
Einstein |
|
| 17. |
Which of the following characteristics of an object would allow no light to pass through? |
| |
| [removed] |
horizontal polarization |
| [removed] |
opaqueness |
| [removed] |
transparency |
| [removed] |
translucency |
| [removed] |
transmutaticity |
| 19. |
The “speed of light” (c) refers to the speed of all electromagnetic waves under what conditions? |
| |
| [removed] |
through the interstellar ether |
| [removed] |
through a clear liquid, like water |
| [removed] |
through a perfect vacuum |
| [removed] |
through the earth’s atmosphere |
| [removed] |
The speed of light is the same under any conditions. |
|
|
|
