| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.07 |
| Score | 0% | 61% |
The formula \(\vec{F_{g}} = { Gm_{1}m_{2} \over r^2}\) applies to which of Newton's laws?
first law of motion |
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universal gravitation |
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third law of motion |
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second law of motion |
Newton's law of universal gravitation defines gravity: All objects in the universe attract each other with an equal force that varies directly as a product of their masses, and inversely as a square of their distance from each other. Expressed as a formula: \(\vec{F_{g}} = { Gm_{1}m_{2} \over r^2}\) where r is the distance between the two objects and G is the gravitational constant with a value of 6.67 x 10-11.
Stratus clouds are __________clouds characterized by horizontal layering with a broad flat base.
low-altitude |
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all-altitude |
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high-altitude |
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mid-altitude |
Clouds are categorized based on their shape, size, and altitude. Stratus clouds are low-altitude clouds characterized by horizontal layering with a broad flat base. When stratus clouds occur on the ground the result is fog.
In cell biology, what part of the cell contains organelles?
cytoplasm |
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nucleus |
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cell membrane |
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cell wall |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles.
As part of digestion, the liver produces bile which breaks down:
fat |
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protein |
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starches |
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sugars |
The liver produces bile which emulsifies (separates) fat.
I biome is made up of naturally occurring flora and fauna. Fauna is which of the following?
minerals |
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habitats |
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animals |
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plants |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).