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Why is it important for scientists to calculate percent error?

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To determine how right or wrong their answer is.
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In Science

How do you calculate percent error in physics?

Take the difference between your experimental value and your known value, and divide that difference by your know value. Say you experimentally found the force of gravity to (MORE)
In Physics

How are the error and the percent error of a measurement calculated?

Take the correct value, subtract the value you got, and then divide that figure by the correct value. Then take the absolute value of that and multiply by 100. For example, sa (MORE)