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mash [69]
3 years ago
14

Why is one able to walk on red-hot coals without getting one’s feet burned?

Chemistry
1 answer:
Hunter-Best [27]3 years ago
3 0
Before the person walks through burning coal, the person will make sure their feet are very wet. When they start walking on the coal, the moisture will evaporate and form a protective gas layer underneath the person's feet.

You can see examples of this if you happen to drip some water on a hot stove or any hot surface. The water will easily glide around on top of a newly formed layer of air underneath it, like air hockey pucks on an air hockey table.

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What mass of the protein gelatin is needed to make 0.5 L of a 3 g/L gelatin solution? Show your work.
REY [17]

Answer:

m = 1.5 gram

Explanation:

Given that,

Density of protein gelatin, d = 3 g/L

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We need to find the mass of the protein gelatin. The density of an object is given by :

d = m/V

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m=d\times V\\\\m=3\ g/L\times 0.5\ L\\\\m=1.5\ g

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SVETLANKA909090 [29]

Answer:

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Explanation:

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What causes hot air to rise, and cool air to sink?
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Answer:

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