Which two statements are true?
-the definitions for electric force and electromagnetic...
Physics, 25.11.2019 05:31 Animallover100
Which two statements are true?
-the definitions for electric force and electromagnetic force are identical.
-electric forces and magnetic forces are different aspects of a single electromagnetic force.
-the operation of a motor depends on the relationship between electric and magnetic forces.
or
-a magnet must be moving for a magnetic force field to exist.
Answers: 1
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Acar travels along a highway with a velocity of 24 m/s, west. the car exits the highway; and 4.0 s later, its instantaneous velocity is 16 m/s, 45° north of west. what is the magnitude of the average acceleration of the car during the four-second interval?
Answers: 2
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Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?
Answers: 1
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Brutus, the dog, is pulling a bone to the left with a force of 20 n. lassie, another dog, is pulling a bone to the right with a force of 18n. what is the net force? a. b. c.
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