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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 1,110-kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 8,900-kg truck moving in the same direction at 20.0 m/s, What is the velocity of the truck right after the collision
A mass on a string of unknown length oscillates as a pendulum with a period of 6 s. What is the period in the following situations, determine The mass is doubled
The seed has a mass of 250 mg., a functional lift-to-drag ratio of 4.0, a lift coefficient under the same conditions of 0.3, and a wing area of 5000 mm2. How long will it take to hit the ground
A 12.0 g bullet is fired horizontally into a 106 g wooden block that is at first at rest on a frictionless horizontal surface and connected to a spring having spring constant 143 N/m.
At a distance of 20m from a source of sound, the sound level is 40 dB. what will the sound level be
Universal beam section: bending moment, maximum stress, radius of curvature, A universal beam section has a second moment of area about its neutral axis of 6487 cm4 and its overall depth is 305 mm
Identical blocks are projected up each track with the same initial speed v0. On the longer track the block slides upward until it reaches a maximum height H above the ground. find the total height for the block on the shorter track
A current with sinusoidal time-dependence, whose peak value is 5.55 A and frequency is 775 cycles per second, Calculate the average power dissipated by the loop, if its resistance is 64.3
An airplane flying horizontally 3600 ft above the ground at 120mi/hh, drops relief aid on the ground. Resolve the angle between the vertical and the line joining plane and target at the instant when he package is released.
A uniform electric field exists in the region between two oppositely charged parallel plates 1.67 cm apart. A proton is released from rest at the surface of the positively charged plate and strikes the surface of the opposite plate in a time inter..
A 5kg mass slides along a frictionless surface and strikes another block of mass 3kg which is at rest. Assume the collision iselastic and determine the final velocities of each of the blocks.
A certain orthodontist uses a wire brace to align a patient's crooked tooth as in the figure below, Find the magnitude of the net force exerted by the wire on the crooked tooth
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