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Two trains on separate tracks move toward one another. Train 1has a speed of 140 km/h, train 2 speed of 55.0 km/h. Train 2 blows it shorn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1? (Assume the speed of sound is 345m/s.)
A 2.0 kg tumor is being irradiated by a radioactive source. The tumor receives an absorbed dose of 12 Gy in a time of880 s. Each disintegration of the radioactive source produces a
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two students walk in the same direction along a straight path at a constant speed one at .90m/s and another at 1.90m/s. assuming that they start at the same point and same time, ho
What is a fiber optic system? This term comprises all the essential elements to install a working unit.
what is the speed of light
Particle function: Protons The number of protons in an atom determines the kind of material: Eg. Hydrogen 1 proton Helium 2 protons Lithium 3 protons B
What are the advantages of polymer fibers optics? The spectral transmission of PMMA fibers is not easy to enhance upon, the quality of the light transmitted over distances long
Write down the relation between focal length and power of a lens. Write down the expression for the equivalent focal length of two thin lenses separated by a distance.
In calculating the integral that one evaluates in applying the Biot-Savart Law one is Answer: The Biot-Savart Law itself written in discrepancy form gives the infinitesimal
The idea that electrons revolved in orbits around the nucleus of an atom without radiating energy away from the atom was postulated by: a) Thompson b) Bohr c) Ruther
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