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According the American Institute of Physics Handbook, Page 2-93,
the acceleration of gravity is given as 9.78 at sea level at the earth's
equator.
... New York City
(Where the acceleration of gravity is not 9.81 N/kg)
If you wrote that g has a value of 9.8 N/kg at the Earth's surface,
I would agree. But is it correct to add the additional significant
figure and make it 9.81 here??
What, if anything, will happen if you do not conform , and use a correct
value for the acceleration of gravity in your course and while grading
the students' regents examination in June?
Suppose you are given a value and you have reason to believe that the
provider of the value used significant figures conventions in deciding
how many significant figures to write in the value.