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Chapter 1: Q3PE (page 33)
Show that 1.0 m/s = 3.6 km/h. Hint: Show the explicit steps involved in converting 1.0 m/s = 3.6 km/h
The required relation is proved below.
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(a) How far apart are two layers of tissue that produce echoes having round-trip times (used to measure distances) that differ by \[{\rm{0}}{\rm{.750 \mu s}}\]? (b) What minimum frequency must the ultrasound have to see the detail of this small?
What are the closest frequencies to \[500\;{\rm{Hz}}\]that an average person can clearly distinguish as being different in frequency from \[500\;{\rm{Hz}}\]? The sounds are not present simultaneously.
What is the ratio of intensities of two sounds of identical frequency if the first is just barely discernible as louder to a person than the second?
What is the area of a circle 3.102 cmin diameter?
A generation is about one-third of a lifetime. Approximately how many generations have passed since the year\({\bf{0}}\)AD?
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