Answer: The Sun appears to move across the sky because the Earth rotates on its axis. ... When where you are is pointed toward the Sun, it is day. Then the Earth rotates you away from the Sun, and it is night.
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Accuracy is the closeness to the specific target and precision is the closeness of the measurements to each other.
I think it is not possible to make cd without plastic . because except plastic no other material is so durable for making cd.
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hope the inserted image will help :)
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D. The presence of a base catalyst.
E. The presence of an acid catalyst. and
F. The presence of heat.
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