skyflyer878
26.02.2020 •
Chemistry
What can block light by placing obstacles in this path , but it much more difficult to block sound why
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Ответ:
because sound is transmitted via mediums,but light doesn't require mediums to be transmitted
Ответ:
7.2 gm or 0.0072 Kg
Explanation:
Let k be the kg of packets that are to be used.
36 X 200 mg = 1000 X k
=> k = 7.2 gm.