wave direction The picture above shows a wave in a series of plastic beads connected on a string. What type of wave is this? I) mechanical II) electromagnetic II) longitudinal IV) transverse I and IV I and III only III Il and IV I and II

wave direction The picture above shows a wave in a series of plastic beads connected on a string. What type of wave is this? I) mechanical II) electromagnetic II) longitudinal IV) transverse I and IV I and III only III Il and IV I and II

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter17: Sound Waves

Section: Chapter Questions

Problem 17.27P: A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of...

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A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 50 dB by an observer 10 km away, (a) What is the average power generated by the horn? (b) What intensity level of the horn's sound is observed by someone waiting at an intersection 50 in from (lie train? Treat the horn as a point source and neglect any absorption of sound by the air.
Astronomy Application Energy from the Sun arrives at the top of the Earth’s atmosphere with an intensity of 1.30kW/m2. How long does it take for 1.8109J to arrive on an area of 1.00 m2?
How many times a minute does a boat bob up and down an ocean waves that have a wavelength of 40.0 m and a propagation speed of 5.00m/s ?
A radar used to detect the presence of aircraft receives a pulse that has reflected off an object 6105s after it was transmitted. What is the distance from the radar station to the reflecting object?
The speed of light in air is approximately v=3.00108 m/s and the speed of light in glass is v=2.00108 m/s . A red laser with a wavelength of =633.00 nm shines light incident of the glass, and some of the red light is transmitted to the glass. The frequency of the light is the same for the air and the glass. (a) What is the frequency of the light? (b) What is the wavelength of the light in the glass?
A sound speaker is rated at a voltage of P=120.00 V and a current of I=10.00 A. Electrical power consumption is P=IV . To test the speaker, a signal of a sine wave is applied to the speaker. Assuming that the sound wave moves as a spherical wave and that all of the energy applied to the speaker is converted to sound energy, how far from the speaker is the intensity equal to 3.82 W/m2?
You are working for a plumber who is laying very long sections of copper pipe for a large building project. He spends a lot of time measuring the lengths of the sections with a measuring tape. You suggest a faster way to measure the length. You know that the speed of a one-dimensional compressional wave traveling along a copper pipe is 3.56 km/s. You suggest that a worker give a sharp hammer blow at one end of the pipe. Using an oscilloscope app on your smartphone, you will measure the time interval t between the arrival of the two sound waves due to the blow: one through the 20.0C air and the other through the pipe. (a) To measure the length, you must derive an equation that relates the length L of the pipe numerically to the time interval t. (b) You measure a time interval of t = 127 ms between the arrivals of the pulses and, from this value, determine the length of the pipe. (c) Your smartphone app claims an accuracy of 1.0% in measuring time intervals. So you calculate by how many centimeters your calculation of the length might be in error.
An astronaut on the Moon wishes to measure the local value of g by timing pulses traveling down a wire that has a large object suspended from it. Assume a wire of mass 4.00 g is 1.60 m long and has a 3.00-kg object suspended from it. A pulse requires 36.1 ms to traverse the length of the wire. Calculate gMoon from these data. (You may neglect the mass of the wire when calculating the tension in it.)
A laser beam is used to levitate a metal disk against the force of Earths gravity. (a) Derive an equation giving the required intensity of light, I, in terms of the mass m of the disk, the gravitational acceleration g, the speed of light c, and the cross-sectional area of the disk A. Assume the disk is perfectly reflecting and the beam is directed perpendicular to the disk. (b) If the disk has mass 5.00 g and radius 4.00 cm, find the necessary light intensity. (c) Give two reasons why using light pressure as propulsion near Earths surface is impractical.
All galaxies farther away than about 50106ly exhibit a red shift in their emitted light that is proportional to distance, with those father and farther away having progressively greater red shifts. What does this imply, assuming that the only source of red shift is relative motion? (Hint: At these large distances, it is space itself that is expanding, but the effect on light is the same.)
2) The diagram shows a ship using an echo locater to find a shoal of fish. The pulsed wave is transmitted from the ship, which is then reflected off the top of the shoal and is then picked up by the receiver. The speed of the pulsed wave in water is 1400m/s. W surface Transmitter Detrcior Ueranonic Puise reflected pulae back to ship The time taken to receive the echo is 0.2s after transmission. Calculate how deep the ship has to lower its fishing nets to catch the top of the shoal.
1. electromagnetic waves are produced by? 2. in the electromagnetic wave, the direction of propagation of the wave is? 3. in the vacuum, the speed of electromagnetic wave is?