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In classical electromagnetic theory, an accelerating charge e radiates energy at the rate W=(2/3)(a^2 e^2/c^3)ergs/s, The accerleration is a and c is the speed of light.At time t=0. a hydrogen atom has a radius 1. Assuming classical circular mothion:
a) Wgat is a initially.
b) what is the initial frequency of radiation that the atom emits.
c) How long does ot take for the radius to collapse from 1 to 0.5(assuing that a is constant).
A thin film of MgF_2 (n= 1.38) coats a piece of glass. Constructive interference is observed for the reflection of light with wavelengths of 500 nm and 625 nm
The Hoover Dam is 220 meters high and the pressure at the bottom of the dam is 2.2 million Pascals. What is the pressure at 55 meters from the surface in million Pascals
A uniform electric field, E = -50 N/C, fills a region of space. A partcicle with mass, m = 0.025 kg, bearing charge, q = 1mC, Determine where and when the particle crosses the x-axis
In the old days, people thought that the Sun might be a burning briquette of coal. At the Earth, the intensity of the radiation of the Sun is about 1400 W/m2. How long would the Sun shine, if it really were a piece of burning coal
A crane drops a 1.0 kg steel ball onto a steel plate. The balls speed just before impact is 2.0m/s. what is the bounce back speed right after the impact
A long solenoid has 1580 turns in a length of 40.0 cm. What current has to flow through the solenoid in order to generate a magnetic field of 3.45 ?T in its interior
A system of 1402 particles, each of which is either an electron or a proton, What is the mass of this system
what is work done on package by friction.
q1. metal rod is 41.126 long at 23.0 and 41.149 long at 46.4 calculate the average coefficient of linear expansion of
one 73" c8x11.5 steel beem is connected to a 22" c8x11.5 fish plate made up of 6x15x1/4 steel plate on each side bolted togething using 3/4" structural bolts, What is the Max capacity of this beam
An object falls off of a pier and into the ocean (sea water) where it displaces a total volume of 3.7 cubic meters of sea water
A rectangular loop lies next to a long straight wire, on the same plane. Both wires carry a current of 3A. find the magnitude and the direction of the net force on each loop
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