Probably C or D as wiki can be adored and blogs it depends who it's by
I’m guessing the answer would be the second one!
The answer is B, because sound waves vibrate through mediums (such as liquids, solids, and gas). It can’t travel through a vacuum because there would be no molecules to vibrate.
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Basically because your skin has several layers to it (see link, below), and the layer that has the blood vessels capable of bleeding in it is further down than a superficial scrape would affect.
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It is the structural isomer. It is a type of isomerism in which particles with the same sub-atomic equation have distinctive holding designs and nuclear association, instead of stereoisomerism, in which sub-atomic bonds are dependable in a similar request and just spatial game plan contrasts.
