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Physics, 21.06.2019 19:30
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Sobre transformaçÔes cĂclicas, sĂŁo feitas algumas afirmaçÔes, determine quais estĂŁo corretas. i â a variação de energia interna em uma transformação cĂclica Ă© nula; ii â o trabalho, em uma transformação cĂclica, Ă© sempre positivo; iii â ao completar um ciclo, o gĂĄs tem a mesma temperatura com a qual começou a transformação; iv â uma transformação cĂclica Ă©, obrigatoriamente, composta de transformaçÔes conhecidas, como adiabĂĄtica, isocĂłrica, etc: a) i e iii b) i e ii c) ii e iii d) i e iv e) iii e iv
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Physics, 22.06.2019 16:00
Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?
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