Physics, 04.07.2019 22:20 meadowsoares7
Phonon density of states and specific heat. assuming that phonons of a three-dimensional crystal obey the following isotropic dispersion relation Đş ka w2 sin where a is the lattice constant, k the spring constant, and k the wave vector (1) derive an expression for the phonon density of states; (2) derive an expression for the phonon intermal energy and specific heat
Answers: 1
Physics, 21.06.2019 23:30
Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?
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Physics, 22.06.2019 11:00
Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line
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Physics, 22.06.2019 11:30
1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.
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Physics, 22.06.2019 11:30
Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?
Answers: 2
Phonon density of states and specific heat. assuming that phonons of a three-dimensional crystal obe...
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