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Pure silicon is used as a photon detector. An incoming photon canstrike the surface and excite electrons from the valence band tothe conduction band, where they can be counted.a) Compute the number of electrons you would expect to countif a silicon detector is struck with a 1.04-MeV gamma ray producedin the decay of a 136Cs nucleus.b) Explain why the counting of electrons should be moreprecise if the detector is cooled well below roomtemperature.
A car is approaching a relecting wall. A stationary observer behind the car hears a sound of frequency 745Hz from the horn, What is the frequency of the car horn
find an article on a current event related to macroeconomics. briefly summarize the article and state how a concept in
The length of a string is 322 cm. It is held fixed at each end. The string vibrates in seven sections; such as the string has seven antinodes, and the string vibrates at 160 Hz.
q1. youre driving down the highway late one night at 20 rm ms when a deer steps onto the road 35rm m in front of you.
Two rectangular pieces of plane glass are laid one upon the other on a table. A thin strip of paper is placed between them at one edge, Find the angle of the wedge
Visible light passes through a diffraction grating that has 900 slits per centimeter, and the interference pattern is observed on a screen that is 2.56 m from the grating. In the first-order spectrum, maxima for two different wavelengths are separ..
Two point charges q and 4q are at x=0 and x=L, respectively, and free to move. A third charge is placed so that the entire three-charge system is in static equilibrium. What is the magnitude of the third charge? What is the x-coordinate of the thi..
What is the angular momentum of a 3.2 kg uniform cylindrical grinding wheel of radius 12cm while rotating at 1400 rpm.
Suppose a muon produced as a result of cosmic ray colliding with a nucleus in the upper atmosphere has a velocity v = 0.9500c. How far would it have traveled as observed on earth
In a semiclassical model of the hydrogen atom, the electron orbits the proton at a distance of 0.053 nm. What is the electron's potential energy
About 27% of the body of a person floating in the Dead Sea will be above the water line. find the density of the water in the Dead Sea
A ball rolls horizontally off a 45-m high cliff with vo=10 m/s. How far from the base of the cliff will it hit the ground, What is the angular acceleration of the tires
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