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Lyrx [107]
2 years ago
9

A girl and her dog are running away from their house. The dog has a mass of 20kg. The girl has a mass of 60 kg.

Chemistry
1 answer:
zloy xaker [14]2 years ago
6 0

Answer: 160 joules

Explanation: the formula for kinetic energy is KE= 1/2 x m x v squared (ke being kinetic energy, m being mass of the object and v being velocity). To find the kinetic energy, you must plug in the given values. KE= 1/2 x 20 x 4 squared. 4 squared is 16, 16 times 20 is 320 and 1/2 of that is 160- so that’s your answer.

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The fraction of the original amount remaining is closest to 1/128

<h3>Determination of the number of half-lives</h3>
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brainly.com/question/26374513

7 0
2 years ago
Arrange the following elements in order of increasing first ionization energy.
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Explanation:

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Order:   Al, Mg, Si, S, P

4 0
3 years ago
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