An insulator is not a good source for heat or electricity to move through. Wood is an example of an insulator. The opposite of insulator is conductor. An example of a conductor is metal.
Answer:

Explanation:
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In this case, for this uniformly accelerated motion in which the car starts from rest at 0 m/s and travels 18 m in 3.0 s, we can compute the acceleration by using the following equation:

Whereas the final distance is 18 m, the initial distance is 0 m, the initial velocity is 0 m/s and the time is 3.0 s, that is why the acceleration turns out:

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Explanation:
here we have mass(m);20 000N in kg will be 9.8kg
acceleration due to gravity (g): 10m/s
height (h) : 10m
so work done will be,
W=mgh
9.8x10x10
980joules
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