Physics, 23.01.2020 00:31 karamalqussiri478
Ahard rubber rod is rubbed with wool and thus gains an approximately uniform net negative charge. the rubber rod is then suspended from a plastic string. a neutral (net charge zero) copper rod is also suspended from a plastic string and brought near the rubber rod. the rods never touch, and no spark jumps between the rods. the rubber rod and the plastic string are insulators (i. e., charge is not free to move through them). the copper rod is a conductor (i. e., charge is free to move through it).
which of the following best represents the charge distribution on the acrylic rod after the rubber rod is moved far away from the acrylic rod? 1) no charge 2) positive charge at the end it was rubbed on 3)negative charge at the end it was rubbed on 4) positive charge throughout 5) negative charge throughout 6) negative at one end and positive at the other is the net charge on the acrylic rod positive, negative, or zero? when the rubber rod was scraped, the net charge on the rubber rod changed or remained the same?
Answers: 2
Physics, 21.06.2019 20:30
Air enters a compressor operating at steady state at 1.05 bar, 300 k, with a volumetric flow rate of 93 m3/min and exits at 12 bar, 400 k. heat transfer occurs at a rate of 15.5 kw from the compressor to its surroundings. assuming the ideal gas model for air neglecting kinetic potential energy effects, determine the power in put in kw.
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Physics, 22.06.2019 07:30
30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve
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Physics, 22.06.2019 09:50
A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p
Answers: 1
Ahard rubber rod is rubbed with wool and thus gains an approximately uniform net negative charge. th...
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