| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.30 |
| Score | 0% | 66% |
Force is measured in newtons (N) with 1 N being the force required to impart an acceleration of:
1 m/s2 to a mass of 1 kg |
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1 m/s to a mass of 1 kg |
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1 mph to a mass of 1 kg |
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1 m/s2 to a mass of 1 kg/s2 |
Weight is a force that describes the attraction of gravity on an object. Force is measured in newtons (N) with 1 N being the force required to impart an acceleration of 1 m/s2 to a mass of 1 kg.
Which of the following is not true of light waves?
are mechanical waves |
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are electromagnetic waves |
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can travel through a vacuum |
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travel faster than sound waves |
Unlike mechanical sound waves that require a physical medium for propagation, light waves are electromagnetic and can travel through empty space. Light waves are also much faster, travelling at 186,000 m/s vs. 343 m/s for sound waves.
Cirrus clouds generally occur in what kind of weather?
fair |
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hot |
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freezing |
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stormy |
Cirrus clouds are thin, wispy high-altitude clouds composed of ice crystals that originate from the freezing of supercooled water droplets. Cirrus clouds generally occur in fair weather and point in the direction of air movement at their elevation.
Leafy vegetables, beans, potatoes, fruits, and whole grains are good sources of:
protein |
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fiber |
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saturated fat |
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unsaturated fat |
Fiber provides bulk to help the large intestine carry away waste. Good sources of fiber are leafy vegetables, beans, potatoes, fruits, and whole grains.
As part of digestion, the liver produces bile which breaks down:
sugars |
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fat |
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protein |
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starches |
The liver produces bile which emulsifies (separates) fat.