# Search results

1. ### Velocity of wave along a rubber cord

]Homework Statement You have a rubber cord of relaxed length x. It be- haves according to Hooke's law with a "spring con- stant" equal to k. You then stretch the cord so it has a new length equal to 2x. a) Show that a wave will propagate along the cord with speed...
2. ### Special relativity: Lightning and Trains (no math involved)

Homework Statement Consider the relativity of simultaneity: A student in a train at rest from his point of view and a professor in a train that is moving in the positive x direction from the student’s perspective. Two lightning of different colors will strike at opposite ends of the trains...
3. ### Collision of a moving proton into a proton at rest (relativity)

Homework Statement A high speed proton collides with a proton at rest, two proton-antiproton pairs were created. That is some of the accelerated protons kinetic energy was enough to be converted into the mass of the new particles. If the proton-antiproton pairs move along together as a single...
4. ### Relativistic acceleration with integration problem

Homework Statement Consider a space ship that accelerates so that the passengers feel and acceleration equal to that of gravity of the earth’s surface, g. If the space ship undergoes this acceleration for a time T, show that the final velocity is given by: V=c[1+(c/gT)^2]^(-1/2)...
5. ### Location of maximum desctructive intereference

Homework Statement Two radio sources in the xy plane are in phase and emitting the same wavelength, λ. Their locations are at coordinates (0,0) and (3λ,0). Show that the largest value of y at which fully destructive intereference may occur at coordinates (0, y) is given by y=35λ/4...
6. ### String waves on a cable car and free falling.

Homework Statement You're riding a cable car from Bogota up to Monser- rate. During your ride there is a small earthquake that sends vertical, transverse waves propagating along the cable. The cable's tension is T, its linear mass den- sity is u, and the wavelength of the wave is...
7. ### Wave propagation along a rubber cord.

Homework Statement You have a rubber cord of relaxed length x. It be- haves according to Hooke's law with a "spring con- stant" equal to k. You then stretch the cord so it has a new length equal to 2x. a) Show that a wave will propagate along the cord with speed...
8. ### A wave speed of a hanging chain

Homework Statement Problem 5 from: http://www.swccd.edu/~jveal/phys274/images/hw01.pdf in case you dont understand my text. A chain of linear mass density u, and length L is hang- ing from a ceiling. There is a wave moving vertically along its length. a) Is the propagation speed...