Question

a student measures the speed of a baseball. the result of the experiment is a final value of 87.97 m/s with an uncertainty of 0.72 m/s. select all of the correct ways (there may be more than one) of reporting the final result in the abstract and conclusion, with uncertainties and units. your are scored correct only if you select all correct answers and no wrong answers. a) (88.0 m/s ± 0.7 m/s) b) 88.0 ± 0.7 m/s c) (88.0 ± 0.7) d) (8.80 ± 0.07)×10^1 m/s e) (88.0 ± 0.7) m/s f) (87.9 ± 0.7) m/s

Explanation:

When reporting experimental results with uncertainties, the unit should be clearly associated with the entire expression (both the measured - value and the uncertainty). Rounding the measured value 87.97 m/s to one - decimal place gives 88.0 m/s, and rounding the uncertainty 0.72 m/s to one - decimal place gives 0.7 m/s. Scientific notation can also be used correctly to represent the value and uncertainty. Options A, D, and E follow these rules. Option B has the unit in an incorrect position, option C is missing the unit, and option F has an incorrect rounded value for the measured quantity.

Answer:

A. (88.0 m/s ± 0.7 m/s)
D. (8.80 ± 0.07)×10¹ m/s
E. (88.0 ± 0.7) m/s