Physics, 18.12.2019 00:31 Magree5321
Aforce f acts on an object undergoing a displacement s, the force being oriented at an angle θ with respect to the displacement. which one of the following correctly describes all of the circumstances under which the work done by the force is zero? entry field with incorrect answer a) the displacement is zero, or the angle is 90°. b) the force is zero, or the displacement is zero, or the angle is 90°. c) the force is zero, or the angle is 90°. d) the force is zero, or the displacement is zero, or the angle is 180°. e) the force is zero, or the displacement is zero.
Answers: 2
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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?
Answers: 1
Aforce f acts on an object undergoing a displacement s, the force being oriented at an angle θ with...
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