Physics, 27.08.2019 06:00 candigirl8847
The states that the processes that have been occurring today have been occurring since earth formed.
Answers: 2
Physics, 22.06.2019 07:10
Search coils and credit cards. one practical way to measure magnetic field strength uses a small, closely wound coil called a search coil. the coil is initially held with its plane perpendicular to a magnetic field. the coil is then either quickly rotated a quarter-turn about a diameter or quickly pulled out of the field. (a) derive the equation relating the total charge q that flows through a search coil to the magnetic-field magnitude b. the search coil has n turns, each with area a, and the flux through the coil is decreased from its initial maximum value to zero in a time ât. the resistance of the coil is r, and the total charge is q = iât, where i is the average current induced by the change in flux. (b) in a credit card reader, the magnetic strip on the back of a credit card is rapidly âswipedâ past a coil within the reader. explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip. (c) is it necessary that the credit card be âswipedâ through the reader at exactly the right speed? why or why not?
Answers: 2
Physics, 22.06.2019 15:10
Suppose that f : rn â rm and that a â k, where k is a connected subset of rn . suppose further that for each x â k there exists a δx > 0 such that f(x) = f(y) for all y â bδx (x). prove that f is constant on k; that is, f(x) = f(a) for all x â k
Answers: 1
Physics, 23.06.2019 00:50
Based on details in the riddle of the rosetta stone, which statement best describes jean-baptiste fourierâs influence on jean-françois champollion?
Answers: 2
Physics, 23.06.2019 01:00
Is the portion of the electromagnetic spectrum that has a frequency just above that of visible light.
Answers: 3
The states that the processes that have been occurring today have been occurring since earth formed...
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