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Two solid rods have the same bulk modulus but one is 2.5 times as dense as the other. In which rod will the speed of longitudinal waves be greater, and by what factor?

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Physics 101 Mechanics

Physics 102 Electricity and Magnetism

Chapter 15

Wave Motion

Periodic Motion

Mechanical Waves

Electromagnetic Waves

Cornell University

University of Michigan - Ann Arbor

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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the speed off. A longitudinal wave in solid is given by these equal toe Welk modelers divided by density. So here in both material, the welcome models is saying, but the density is different. Suppose Ruben is the density off less than some material, and Row two is the density off more dance malarial. Ohh. So if we see that a C off speed in different materials, we can write E by Roman, divided by E Bye Road do we can write density in Bolden's material, they're very, very density look, less dense material. So the even why we two is equal to road to buy Ruben on the road Off wrote away Roman. And here we have given that the one is 2.5 times as dense as the others, so we can consider here. Roto by Robin is equal to 0.25 So even why we do will be equal toe under Road 0.25 It is around 1.6, so we can say the spirit in the Len's death material is greater than so. The more dense material and it is 1.6 times to the more than some material

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