Physics, 10.07.2019 22:20 shelbyp2003
Asimple model of a strip of rubber represents it by a polymer chain consisting of n links connected end to end; each link has length a. the links all lie along the y-axis but they may be oriented in either the y or the - y direction, so that the distance l from beginning to end of the chain is much less than na. both orientations of the links have the same energy, and there is no interaction energy apart from weak thermal coupling the strip of rubber is suspended from a peg and supports a weight w. it is in thermal equilibrium at absolute temperature t. assume that the links are massless. if the number of links in the upward direction is denoted by n, the length l of the rubber is given by l (n 2n) (a) explain why, for a single link, the partition function is given by 1+exp(-2pw) and find the partition function of the system. [4 marks] (b) find expressions for the mean energy of the system and the mean value of n [4 marks] (c) hence (or otherwise) show that the equilibrium length of the strip is given by: - βλ" l n te biw
Answers: 3
Physics, 22.06.2019 10:00
** urgent** the voltage across the primary winding is 350,000 v, and the voltage across the secondary winding is 17,500 v. if the secondary winding has 600 coils, how many coils are in the primary winding? a- 30 coilsb- 583 coilsc- 12,000 coilsd- 332,500 coils
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Physics, 22.06.2019 17:30
Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.
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Physics, 22.06.2019 22:50
What is an electric motor? explain its operation. 2-3 sentence
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Asimple model of a strip of rubber represents it by a polymer chain consisting of n links connected...
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