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Chapter 1: Q10PE (page 11)
An infant’s pulse rate is measured to be . What is the percent uncertainty in this measurement?
The percentage uncertainty in the given case is 3.846%.
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An infant’s pulse rate is measured to be. What is the percent uncertainty in this measurement?
When non-metric units were used in the United Kingdom, a unit of mass called the pound-mass\(\left( {{\bf{lbm}}} \right)\)was employed, where\({\bf{1}}{\rm{ }}{\bf{lbm}} = {\bf{0}}.{\bf{4539}}{\rm{ }}{\bf{kg}}\). (a) If there is an uncertainty of\({\bf{0}}.{\bf{0001}}{\rm{ }}{\bf{kg}}\)in the pound-mass unit, what is its percent uncertainty? (b) Based on that percent uncertainty, what mass in pound-mass has an uncertainty of\({\bf{1}}{\rm{ }}{\bf{kg}}\)when converted to kilograms?
(a) How many significant figures are in the numbers 99and 100? (b) If the uncertainty in each number is 1, what is the percent uncertainty in each? (c) Which is a more meaningful way to express the accuracy of these two numbers, significant figures or percent uncertainties?
American football is played on along field, excluding the end zones. How long is the field in meters? (Assume thatequals .)
The length and width of a rectangular room are measured to be\({\bf{3}}.{\bf{955}}{\rm{ }} \pm {\rm{ }}{\bf{0}}.{\bf{005m}}\)and \({\bf{3}}.{\bf{050}}{\rm{ }} \pm {\rm{ }}{\bf{0}}.{\bf{005m}}\). Calculate the area of the room and its uncertainty in square meters.
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