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Yuliya22 [10]
4 years ago
9

How did domestication of early crops start?​

Social Studies
1 answer:
vladimir1956 [14]4 years ago
6 0
1000 years ago people started cropping plants and they were spreading slowly
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How fast must an object move before its length appears to be contracted to one-half its proper length?
notsponge [240]

The object must move with the speed of \frac{\sqrt{3} }2} times to approximately seeing that it is contracted to exactly half of its actual length.

<h3>How is this calculated?</h3>

The length contraction experimented by the object as it approaches lightspeed, in meters per second, is described by Lorentz contraction formula:

\frac{L}{L'} = \sqrt{(1) - (\frac{v}{c})^{2}

Here, v is the current speed m/s

c is the speed of light in m/s

L' is the length of the object at rest in m

L is the length of the object at the current speed in m

Now we know that

\frac{L}{L'}= \frac{1}{2} and \frac{v}{c} = r then,

\frac{1}{2} = \sqrt{1 - r^{2} }\\\frac{1}{4} = 1 - r^{2}\\r^{2} = \frac{3}{4}

Hence, r = \frac{\sqrt{3} }{2}

Therefore, the answer is the object must travel at a speed of \frac{\sqrt{3} }{2} times the lightspeed to be contracted to one-half its proper length.

To know more about the Lorentz contraction formula, visit:

brainly.com/question/17407131

#SPJ4

7 0
2 years ago
When Mandy last got her drive through order at the fast food restaurant, she thought the employee who helped her was cold and un
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Answer: Option C

         

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In the given case, the main objective of the consumer was to get her product but the service by the employee was also an inseparable part that affected the utility satisfaction of Wendy.

Hence we can conclude that the correct option is C.

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After you start to believe that someone is dangerous, you examine everything the person says or does for additional evidence of
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<span>I believe in this instance you would be profiling them. You would be examining their behavior to see if there is anything to suggest that they might actually commit a dangerous act. This would be something that a detective or police officer would do.</span>
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What strategy did the allies agree upon in order to win world war ii??
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One of the greatest military tactical strategy that the Allied Powers of USA, Great Britain, and Russia have done in the second world war was that they decided to infiltrate Germany and Italy first, and it would be followed by Japan's defeat in the Pacific. It was mainly because they thought at that time that "Adolf Hitler is more dangerous than the emperor of Japan."
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Where did the Oregon trail begin and where did it end
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The Oregon trail begin in Missouri and ended in Oregon
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