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almond37 [142]
3 years ago
8

How fast is a ball rolling if it contains 98 j of kinetic energy and has a mass of 4kg

Physics
1 answer:
zysi [14]3 years ago
4 0

Answer:

the ball is rolling 7m/s

Explanation:

Formula for kinetic energy: 1/2mv²

K = 1/2mv²

98 = 1/2(4)v²

98 = 2v²

49 = v²

√49 = v

7 = v

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What is a crystal as applied in physics ​
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Answer:

The correct answer is - A matter that has an ordered arrangement of atoms, molecules, or ions.

Explanation:

In physics, a crystal is a type of solid matter in which a highly arranged molecule or atoms present to form a lattice that extended in all directions. It is a lightweight clear solid which is normally is colorless.

It can be cubic, hexagonal, triclinic, monoclinic, orthorhombic, tetragonal, and trigonal that are ordered arrangments. Its internal symmetry is visible to its surface.

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If you put two identical cars on opposite sides of a large magnet, what happens
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Depends on what pole it is.

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A solenoid field is:
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increased with an increased current flow

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A 0.80 kg object tied to the end of a 2.0 m string swings as a pendulum. At the lowest point of its swing, the object has a kine
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3.32 m/s

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3 years ago
The value of the normal force exerted on a 2,000 gram block on a table
kobusy [5.1K]

Answer:

N = 19.6 N

Explanation:

Given that,

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