When Does a Slip Current Occur?
When Does a Slip Current Occur? A slip current occurs when a steady stream of air tries to resume its even flow after being diverted by an object at right angles to it....
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What Is Energy?
Energy is the power to act. There are several different forms of energy, and one kind can be changed into another kind. But although it can be changed from one form...
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How Far Can You See?
How Far Can You See? How far the human eye can see depends on how many particles of light, or photons, a distant object emits. The farthest object visible with the...
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What Is Radar?
What Is Radar? Radar, or radiolocation, as it was called in the early days, is the use of radio waves to find the whereabouts of aircraft or ships. Electromagnetic...
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Why Is Grass Green?
Why Is Grass Green? The green color in grass-and in most other plants-comes from chloroplast within the cells, each of which contains four different colors or pigments....
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