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irina [24]
3 years ago
12

1. Which is an advantage of coal energy?​

Physics
2 answers:
pentagon [3]3 years ago
4 0
Coals energy is affordable and it is easy to burn.
AysviL [449]3 years ago
4 0
The only advantage of turning coal
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half life worksheet answer key 3. What percent of a sample As-81 remains un-decayed after 43.2 seconds
Ivahew [28]

The final mass after decay can be obtained by using under given relation:

half life period of As-81 = 33 seconds

mf = mi x (1/2^n)

= 100 x ( 1/2^(43.2/33))

= 40.4 %


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3 years ago
20 characters or more
andreev551 [17]

Answer:

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Explanation:

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2 years ago
Find the volume of a sphere of radius 10 mm.
vredina [299]

Answer:

Explanation: This is done using the equation:

\frac{4}{3} π R^{3}

Because the Radius is a know value. We have the following.

\frac{4}{3} π (10mm)^{3}

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What two characteristics are used to classify air masses
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Answer: Temperature and humidity are the two characteristics used to classify air masses.

Explanation:

7 0
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