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Chapter 1: Q22PE (page 11)
What is the area of a circle 3.102 cmin diameter?
The area of the circle is or .
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Explain why heat pumps do not work as well in very cold climates as they do in milder ones. Is the same true of refrigerators?
(a) A person’s blood pressure is measured to be. What is its percent uncertainty? (b) Assuming the same percent uncertainty, what is the uncertainty in a blood pressure measurement of 80 mm Hg?
Can classical physics be used to accurately describe a satellite moving at a speed of ? Explain why or why not.
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.
Find the sound intensity level in decibels of \[{\rm{2 \times 1}}{{\rm{0}}^{{\rm{ - 2}}}}{\rm{ W}} \cdot {{\rm{m}}^{{\rm{ - 2}}}}\]ultrasound used in medical diagnostics.
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