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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On December 26, 2004, a great earthquake occurred off the coast of Sumatra and trig-
gered immense waves (tsunami) that killed some 200, 000 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. What was the speed of these waves in m/s and km/h?
Does your answer help you understand why the waves caused such devastation?
1) A person's heartbeat is measured to be 65 beats per minute.What is the period between heartbeats in seconds?
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
Chapter 13 Solutions
COLLEGE PHYSICS
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- During heavy exercise, human heart rates can reach 160 beats per minute. What is the time per beat in units of seconds? Number secarrow_forwardOn 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 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
- can you please solve this problem in a piece of paper instead of typing it on the computer. i already asked this question but i didn't get it written on a paper.arrow_forwardA lightning bolt is observed and the resultant thunderclap is heard 5 seconds afterwards. Assuming the speed of sound in air is 340 m/s, how far away was the lightning bolt? Your answer should be in units of m but you should only submit the number for your answer.arrow_forwardDuring a thunderstorm, 4.6 s elapses between observing a lightning flash and hearing the resulting thunder. Approximately how far away in kilometers and miles was the lightning flash? (Assume the speed of sound is 344 m/s.)arrow_forward
- A f = 2п , Vx (L + 0.8D) f = frequency, in hertz v = 343 meters/second (speed of sound in air) A = area of opening, in m2 V = volume of round cavity, in m³3 L = length of neck, in m D = diameter of neck, in marrow_forwardYou place your ear onto a steel railroad track and hear the sound of a distant train through the rails Δt = 3.3 seconds faster than you do through the air. The speed of sound in steel is vs = 6100 m/s while in air the speed of sound is va = 343 m/s. Write an equation for the time it takes the sound to reach you through the air if the distance to the train is represented by D. Write an equation for the time it takes the sound to reach you through the steel if the distance to the train is represented by D. Use the difference in these two times to write an equation for the distance to the train. For the given information find the distance to the train in metersarrow_forwardOn the planet Venus a rare volcanic eruption occurs. The sound of it is 30 Hz and it has a wavelength of 13.7 m. How fast must the speed of sound be on Venus?arrow_forward
- A creature can detect very small objects, such as an insect whose length is approximately equal to one wavelength of the sound the bat makes. If a bat emits chirps at a frequency of 65 kHz, and if the speed of sound in air is 340 m/s, what is the Cmallest insect (in mm) the bat can detect?arrow_forwardThe motion of a particle is described by y = (0.05 m) sin(20 rad t), where y is in meters and tis in seconds. What is the frequency of the motion of the particle? O 3 Hz O 2 Hz O 1 Hz O 4 Hzarrow_forwardPage 22 of 24 Question 22 ( If the Mach number is 2.2 and the speed of an airplane measured by radar is 2115 km/h, what is the local speed of sound and the temperature of air? ➤11 *** Paragraph + v V I U A B EE V OF 90 30arrow_forward
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