Answer:
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Explanation:
According to Erikson, the main function of play is to allow children to learn about the world around them and try new social roles. The children are able to understand the cultural roles through play and to integrate or take in socially accepted cultural norms into their personalities. He considered children who play to be socially competent.
The object must move with the speed of
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:

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
and
then,

Hence, r = 
Therefore, the answer is the object must travel at a speed of
times the lightspeed to be contracted to one-half its proper length.
To know more about the Lorentz contraction formula, visit:
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To determine a price for your cookies, you calculate your
<u> input costs.</u>
Answer: Option A
<u>Explanation:</u>
Input costs are the costs of the variables which are used to produce a particular product and these costs will affect the final price of the product. For determining the price of the final product the price of the inputs used for production and in the amount they are used are kept into mind. So for making cookies, price of sugar, flour, chocochips, butter etc are kept in mind.