College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
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Textbook Question
Chapter 16, Problem 63PE
Medical Application
Ultrasound of intensity
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Solar cells convert the energy of incoming light to electric energy; a good quality cell operates at an efficiency of 15%. Each person in the United States uses energy (for lighting, heating, transportation, etc.) at an average rate of 11 kW. Although sunlight varies with season and time of day, solar energy falls on the United States at an average intensity of 200 W/m2. Assuming you live in an average location, what total solar-cell area would you need to provide all of your energy needs with energy from the sun? Express your answer with the appropriate units.
Solar cells convert the energy of incoming light to electric energy; a good quality cell operates at an efficiency of 15%. Each person in the United States uses energy (for lighting, heating, transportation, etc.) at an average rate of 11 kW. Although sunlight varies with season and time of day, solar energy falls on the United States at an average intensity of 200 W/m2. Assuming you live in an average location, what total solar-cell area would you need to provide all of your energy needs with energy from the sun?
A piano wire with a mass of 2.75 g and a length of 85 cm is stretched with a tension of 30 N. A wave with frequency 135 Hz and amplitude 1.8 mm
travels along the wire. Calculate the average power carried by the wave.
336.1280 mW
363.1280 mW
O 726.256mW
O 762.265 mW
Chapter 16 Solutions
College Physics
Ch. 16 - Describe a system in which elastic potential...Ch. 16 - What conditions must be met to produce simple...Ch. 16 - (a) If frequency is not constant for some...Ch. 16 - Give an example of a simple harmonic oscillator,...Ch. 16 - Explain why you expect an object made of a stiff...Ch. 16 - As you pass freight truck with a trailer on a...Ch. 16 - Some people modify cars to be much closet to me...Ch. 16 - Pendulum clocks are made to run at the correct...Ch. 16 - Explain in terms of energy how dissipative forces...Ch. 16 - Give an example of a damped harmonic oscillator....
Ch. 16 - How would a car bounce after a bump under each of...Ch. 16 - Most harmonic oscillators are damped and, if...Ch. 16 - Why are soldiers in general ordered to “route...Ch. 16 - Give one example of a transverse wave and another...Ch. 16 - What is the difference between propagation speed...Ch. 16 - Speakers in stereo systems have two colorcoded...Ch. 16 - Two identical waves undergo pure constructive...Ch. 16 - Circular water waves decrease in amplitude as they...Ch. 16 - Fish ate hung on a spring scale to determine their...Ch. 16 - It is weighin time for the local under85kg rugby...Ch. 16 - One type of BB gun uses a spring-driven plunger to...Ch. 16 - (a) The springs of a pickup truck act like a...Ch. 16 - When an 80.0kg man stands on a pogo stick, the...Ch. 16 - A spring has a length of 0.200 m when a 0.300kg...Ch. 16 - What is the period of 60.0 Hz electrical power?Ch. 16 - If your heart rate is 150 beats per minute during...Ch. 16 - Find the frequency of a tuning fork that takes...Ch. 16 - A stroboscope is set to flash every 8.00105s. What...Ch. 16 - A tire has a tread pattern with a crevice every...Ch. 16 - Engineering Application Each piston of an engine...Ch. 16 - A type of cuckoo clock keeps time by having a mass...Ch. 16 - If the spring constant of a simple harmonic...Ch. 16 - A 0.500kg mass suspended from a spring oscillates...Ch. 16 - By how much leeway (both percentage and mass)...Ch. 16 - Suppose you attach the object with mass m to a...Ch. 16 - A diver on a diving board is undergoing simple...Ch. 16 - Suppose a diving beard wi1h no one on it bounces...Ch. 16 - Figure 15.46 This child’s toy relies on springs to...Ch. 16 - A 90.0kg skydiver hanging from a parachute bounces...Ch. 16 - What is the leng1h of a pendulum that has a period...Ch. 16 - Some people think a pendulum with a period of 1.00...Ch. 16 - What is the period of a 1.00mlong pendulum?Ch. 16 - How long does it take a child on a swing to...Ch. 16 - The pendulum on a cuckoo clock is 5.00 cm long....Ch. 16 - Two parakeets sit on a swing with their combined...Ch. 16 - (a) A pendulum that has a period of 3.00000 s and...Ch. 16 - A pendulum with a period of 2.00000 s in one...Ch. 16 - (a) What is the effect on the period of a pendulum...Ch. 16 - Find the ratio of the new/old periods of a...Ch. 16 - At what rate will a pendulum clock run on me Moon,...Ch. 16 - Suppose the length of a clock’s pendulum is...Ch. 16 - If a pendulumdriven clock gains 5.00 s/day, what...Ch. 16 - The length of nylon rope from which a mountain...Ch. 16 - Engineering Application Near the top of the...Ch. 16 - (a) What is me maximum 1nreluzmcity at an 85.0kg...Ch. 16 - A novelty clock has a 0.0100kg mass object...Ch. 16 - At what positions is the speed of a simple...Ch. 16 - A ladybug sits 12.0 cm from the center of a...Ch. 16 - The amplitude of a lightly damped oscillator...Ch. 16 - How much energy must the shock absorbers of a...Ch. 16 - If a car has a suspension system with a force...Ch. 16 - (a) How much will a spring that has a force...Ch. 16 - Suppose you have a 0.750kg object on a horizontal...Ch. 16 - Engineering Application: A suspension bridge...Ch. 16 - Stems in the South Pacific can create waves that...Ch. 16 - Waves on a swimming pool propagate at 0.750m/s....Ch. 16 - Wind gusts create ripples on the ocean that have a...Ch. 16 - How many times a minute does a boat bob up and...Ch. 16 - Scouts at a camp shake the rope bridge may have...Ch. 16 - What is the wavelength of the waves you create in...Ch. 16 - What is the wavelength of an earthquake that...Ch. 16 - Radio waves transmitted through space at...Ch. 16 - Your ear is capable of differentiating sounds that...Ch. 16 - (a) Seismographs measure the arrival times of...Ch. 16 - A car has two horns, one emitting a frequency of...Ch. 16 - The middleChammer of a piano hits two strings,...Ch. 16 - Two tuning forks having frequencies of 460 and 464...Ch. 16 - Twin jet engines on an airplane are producing an...Ch. 16 - A wave traveling on a Slinky® mat is stretched to...Ch. 16 - Three adjacent keys on a piano (F, F—sharp, and G)...Ch. 16 - Medical Application Ultrasound of intensity...Ch. 16 - The low-frequency speaker of a stereo set hag a...Ch. 16 - To increase intensity of a wave by a factor of 50,...Ch. 16 - Engineering Application A device called an...Ch. 16 - Astronomy Application Energy from the Sun arrives...Ch. 16 - Suppose you have a device that extracts energy...Ch. 16 - Engineering Application (a) A photovoltaic array...Ch. 16 - A microphone receiving a pure sound tone feeds an...Ch. 16 - Medical Application (a) What is the intensity in...
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- Review. A tuning fork vibrating at 512 Hz falls from rest and accelerates at 9.80 m/s2. How far below the point of release is the tuning fork when waves of frequency 485 Hz reach the release point?arrow_forwardA dolphin (Fig. P17.7) in seawater at a temperature of 25C emits a sound wave directed toward the ocean floor 150 m below. How much time passes before it hears an echo?arrow_forwardEngineering Application (a) A photovoltaic array of (solar cells) is 10.0% ef?cient in gathering solar energy and converting it to electricity. If the average intensity of sunlight on one day is 700W/m2, what area should your array have to gather energy at the rate of 100 W? (b) What is the maximum test of the array if it must pay for itself in two years of operation averaging 10.0 hours per day? Assume that it earns money at the rate of 9.00 (¢ per kilowatthour.arrow_forward
- The area of a typical eardrum is about 5.00 X 10-5 m2. (a) (Calculate the average sound power incident on an eardrum at the threshold of pain, which corresponds to an intensity of 1.00 W/m2. (b) How much energy is transferred to the eardrum exposed to this sound lor 1.00 mill?arrow_forwardShow that an intensity of 1012 W/m2 is the same as 1016 W/cm2.arrow_forwardA yellow submarine traveling horizontally at 11.0 m/s uses sonar with a frequency of 5.27 103 Hz. A red submarine is in front of the yellow submarine and moving 3.00 m/s relative to the water in the same direction. A crewman in the red submarine observes sound waves (pings) from the yellow submarine. Take the speed of sound in seawater as 1 533 m/s. (a) Write Equation 14.12. (b) Which submarine is the source of the sound? (c) Which submarine carries the observer? (d) Does the motion of the observers submarine increase or decrease the time between the pressure maxima of the incoming sound waves? How does that affect the observed period? The observed frequency? (e) Should the sign of v0 be positive or negative? (f) Does the motion of the source submarine increase or decrease the time observed between the pressure maxima? How does this motion affect the observed period? The observed frequency? (g) What sign should be chosen for vs? (h) Substitute the appropriate numbers and obtain the frequency observed by the crewman on the red submarine.arrow_forward
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