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Physics, 10.12.2019 01:31 bobtothemaxthe1st
Apiece of soft iron is placed in a solenoid increasing the magnetic field in an arrangement that can be switched on and off. such a device is calleda. a hysteresis loop. b. an electrosolenoid. c. a permanent magnet. d. a ferromagnet.
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Physics, 22.06.2019 16:40
Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".
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Apiece of soft iron is placed in a solenoid increasing the magnetic field in an arrangement that can...
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