Chapter 1: 14CQ (page 11)
A real process may be nearly adiabatic if it occurs over a very short time. How does the short time span help the process to be adiabatic?
Because of the very short duration in which the process takes place, the heat does not get enough time to enter the system, thus the process is adiabatic.
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A person measures his or her heart rate by counting the number of beats in 30 s. If are counted in, what is the heart rate and its uncertainty in beats per minute?
A generation is about one-third of a lifetime. Approximately how many generations have passed since the year\({\bf{0}}\)AD?
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) A car speedometer has a\(5.0\% \)uncertainty. What is the range of possible speeds when it reads \(90{\rm{ }}{{km} \mathord{\left/{\vphantom {{km} {hr}}} \right. \\} {hr}}\)? (b) Convert this range to miles per hour.\(\left( {1{\rm{ }}km = 0.6214{\rm{ }}mi} \right)\)
What is the relationship between the accuracy and uncertainty of measurement?
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