COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 13, Problem 32QAP
To determine
The frequency of humming bird wings
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A bat uses echolocation to detect prey as small as about 1 wavelength of the sound of a bat call. Assume a bat produces a sound with a frequency of 60.9 kHz, and the speed of sound in air is 339 m/s. What is the length in mm of the smallest prey the bat can detect?
a bat can detect small objects such as an insect whose size is approximately equal to one wavelength of the sound the bat makes. if bats emit a chirp at a frequency of 20.2 kHz and the speed of sound in air is 323 m/s, what is the smallest insect a bat can detect? answer in units of mm
1) A person's heartbeat is measured to be 65 beats per minute.What is the period between heartbeats in seconds?
Chapter 13 Solutions
COLLEGE PHYSICS
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- On December 26, 2004, a great earthquake occurred off the coast of Sumatra and triggered immense waves (tsunami) that killed some 200000 people. Satellites observing these waves from space measured 800 km from one wave crest to the next and a period between waves of 1.0 hour. The speed of the waves were 800 km/h. How does the speed of the wave help you understand why the waves caused such devastation?arrow_forwardDuring heavy exercise, human heart rates can reach 160 beats per minute. What is the time per beat in units of seconds? Number secarrow_forwardDuring a thunder storm over the summer, you want to estimate the distance in kilometers (not miles!) of a flash of lightning: you count the number of seconds between seeing the flash and hearing thunder, and then you divide by 2. 3. 4. 5. none of the abovearrow_forward
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