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Novay_Z [31]
3 years ago
9

Atoms of the same element having unequal numbers of protons and electrons are called __________

Physics
1 answer:
stiks02 [169]3 years ago
3 0

Atoms of the same element having unequal numbers of protons and electrons are called __________IONS

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Rony fills a bucket with water and whirls it in a vertical circle to demonstrate that the water will not spill from the bucket a
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Answer:

0 N, 3.49 m/s

Explanation:

Draw a free body diagram for the bucket at the top of the swing.  There are two forces acting on the bucket: weight and tension, both downwards.

If we take the sum of the forces in the radial direction, where towards the center is positive:

∑F = ma

W + T = m v² / r

The higher the velocity that Rony swings the bucket, the more tension there will be.  The slowest he can swing it is when the tension is 0.

W = m v² / r

mg = m v² / r

g = v² / r

v = √(gr)

Given that r = 1.24 m:

v = √(9.8 m/s² × 1.24 m)

v = 3.49 m/s

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The focal length of the given spherical mirror is 20cm.

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Before Mt. Everest was discovered, what was the highest mountain in the world?
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