Physics, 29.07.2019 08:00 minionsomg1
When an object is moving with uniform circular motion, the centripetal acceleration of the object a. is circular. b. is perpendicular to the plane of motion. c. is zero. d. is directed toward the center of motion. select the best answer from the choices provided a b c d
Answers: 1
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What is the conversion factor between kg/m^3 and g/m^3. express your experimental values for the densities in kg/m^3.
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Adiver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. he then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. the net external torque acting on the diver is zero. what is his moment of inertia in the tuck position?
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Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?
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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 ∆t. the resistance of the coil is r, and the total charge is q = i∆t, 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 “swiped” 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 “swiped” through the reader at exactly the right speed? why or why not?
Answers: 2
When an object is moving with uniform circular motion, the centripetal acceleration of the object a....
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