| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.41 |
| Score | 0% | 68% |
Velocity is the rate at which an object changes position. What is the formula for velocity?
\(\vec{v} = \vec{d}t \) |
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\(\vec{v} = { t \over \vec{d} } \) |
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none of these |
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\(\vec{v} = { \vec{d} \over t } \) |
Velocity is the rate at which an object changes position. Rate is measured in time and position is measured in displacement so the formula for velocity becomes \(\vec{v} = { \vec{d} \over t } \)
An element in the physical state of __________ maintains neither a constant volume nor a constant shape.
plasma |
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gas |
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liquid |
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solid |
The gaseous state occurs at a higher temperature range than the solid and liquid states of the same substance. In this state, molecules flow very freely around each other and will spread out as far as they're able. Gases maintain neither a constant volume nor a constant shape.
Poor balance could indicate an issue with which part of the nervous system?
cerebrum |
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cerebellum |
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medulla |
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spinal cord |
The cerebellum is a large cluster of nerves at the base of the brain that's responsible for balance, movement, and muscle coordination.
In the metric system, what prefix represents 10-3?
kilo |
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mega |
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milli |
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centi |
In the metric system, milli is the prefix for 10-3.
Earth's troposphere layer is which of the following?
coldest |
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hottest |
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closest to the surface |
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farthest from the surface |
The Earth's atmosphere has several layers starting with the troposphere which is closest in proximity to the surface. Containing most of the Earth's breathable air (oxygen and nitrogen), it's a region with warmer temperatures closer to the surface and cooler temperatures farther away which results in the rising and falling air that generates weather.