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AveGali [126]
4 years ago
12

Question 4 Unsaved If element X has 93 protons, how many electrons does it have? Your Answer:

Physics
1 answer:
9966 [12]4 years ago
8 0
It have 93 electrons
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3 0
3 years ago
A 4kg block slides freely across a rough surface such that the block slows down with an acceleration of −1.25 m/s2 . What is the
Sophie [7]

Answer:

The coefficient of kinetic friction between the block and the surface is 0.127.

Explanation:

Given that,

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F=\mu mg\\\\ma=\mu mg\\\\\mu=\dfrac{a}{g}\\\\\mu=\dfrac{1.25}{9.8}\\\\\mu=0.127

So, the coefficient of kinetic friction between the block and the surface is 0.127.

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............

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