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The ripples in a certain groove 10.8 $\mathrm{cm}$ from the center of a 33 -rpm phonograph record have a wavelength of 1.55 $\mathrm{mm}$ . What will be the frequency of the sound emitted?
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Physics 101 Mechanics
Physics 102 Electricity and Magnetism
Chapter 15
Wave Motion
Periodic Motion
Mechanical Waves
Electromagnetic Waves
Cornell University
Rutgers, The State University of New Jersey
University of Sheffield
McMaster University
Lectures
03:40
In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating (radiating) through space, carrying electromagnetic radiant energy. It includes radio waves, microwaves, infrared, (visible) light, ultraviolet, X-rays, and gamma rays. Electromagnetic waves of different frequency are called by different names since they have different sources and effects on matter. In order of increasing frequency and decreasing wavelength these are: radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.
10:59
In physics, Maxwell's equations are a set of partial differential equations that, together with the Lorentz force law, form the foundation of classical electromagnetism, classical optics, and electric circuits. They underpin all electric, optical and radio such electromagnetic technologies as power generation, electric motors, wireless communication, cameras, televisions, computers, and radar. Maxwell's equations describe how electric and magnetic fields are generated by charges, currents, and changes of these fields. The equations have two major variants. The microscopic Maxwell equations have universal applicability but are unwieldy for common calculations. They relate the electric and magnetic fields to total charge and total current, including the complicated charges and currents in materials at the atomic scale. The macroscopic Maxwell equations define two new auxiliary fields that describe the large-scale behaviour of matter without having to consider atomic scale details. The equations were published by Maxwell in his 1864 paper "A Dynamical Theory of the Electromagnetic Field". In the original paper Maxwell fully derived them from the Lorentz force law (without using the Lorentz transformation) and also from the conservation of energy and momentum.
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we have the riposte off a certain girls, That is Tim Point A centimeter from the center off a phonograph record is that record has a 33 are revolutions per minute and, um, the report has a weightless off 1.5 millimeter. So it's 10.8 centimeter from search history RPM and it has a way friends off 1.5 millimeter. It won't You know what is the frequency? So I guess very person we can do is we want to find the speed off the wave we have servicing revolutions per minute is that is definitely not as a unit. And we want to convert. It grew out for a minute times One minute is 60 seconds times where revolution is to pie. Um, actually, maybe let's try to instead of the radio velocity, Let's try to find the actual velocity. So more revolution is two pi r. So this gives us a speed of travel. Oh, so neato, sir, Relative to the fixed needle position, the ripples are moving with this senior velocity in the speed Is he over gender? This gives us 240 hurts
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