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A guitar string is supposed to vibrate at 247 $\mathrm{Hz}$ , but is measured to actually vibrate at 255 $\mathrm{Hz}$ . By what percentage should the tension in the string be changed to get the frequency to the correct value?
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Physics 101 Mechanics
Physics 102 Electricity and Magnetism
Chapter 15
Wave Motion
Periodic Motion
Mechanical Waves
Electromagnetic Waves
Monique D.
October 8, 2021
Is the string vibrating sharp or flat?
University of Michigan - Ann Arbor
Simon Fraser University
University of Sheffield
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 to get her streams. That is supposed, um, to vibrate at 247 Hertz, but instead it vibrates and 200 55 hurts. So the pitch is higher than we hoped. And that is because if this insolence and the way Flint as a frequency has relationship off equals the over, Linda and Linda could be half of L. Or it could be like to L. A. Or like our or have a veil. Let's say it's a far better frequencies, so Lamda equals to L. But pretty much what we're trying to say is that frequency will be proportional to attention divided by you. And because autopsies will not change, frequency is proportional to the square it optician. So frequency one over frequency to equals a screw it attention one over attention to. So let's say one is, um, what we want and two is that's the one is. What we want into is what it's actually collaborating at. So then what we want is F one, and it equals two. If two terms, if one over f too. It's quick. So, um so force is does it tell us what the forces it did not have what supports it? So I just quit after you on f want iss? What we're hoping for is 227 birds have to what it actually vibrates is 255 words square. This gets us 0.938 after so we won't you decrease attention by roughly 6.2%.
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