Physics, 29.07.2019 18:30 kelseypichla
As jack pulls his wagon down the street it moves faster and faster. jill, sitting a few meters ahead on the sidewalk, wants to slow jack's wagon down so that it travels with a constant speed. how can jill accomplish her goal? a) sit in the wagon so that it begins to slow down. b) push jack away from the wagon so that he is no longer pulling it. c) pull on the wagon in the opposite direction with twice jack's force. d) pull on the wagon in the opposite direction with a force equal to jack's.
Answers: 2
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Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?
Answers: 1
As jack pulls his wagon down the street it moves faster and faster. jill, sitting a few meters ahead...
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