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A respiration monitor has a flexible loop of copper wire, which wraps about the chest. As the wearer breathes, the radius of the loop of wire increases and decreases. When a person in the Earth's magnetic field inhales, what is the average current in the loop, assuming that it has a resistance of 32.9 ? and increases in radius from 18.5 cm to 24.1 cm over 1.13 s? (Assume that the magnetic field is perpendicular to the plane of the loop and has a magnitude of 42.9 ?T.)
Using the capacitance determined in part (a), calculate the current in the circuit 7.4 ms after the switch is closed. Suppose that the capacitor is uncharged initially and that the emf of the battery is 9.0 V
High speed photography shows that when a golf club hits a golf ball, the club and the ball typically remain in contact for 1x 10?3 s, Estimate the magnitude of the force that the club exerts on the ball
A resistor with 325? and an inductor are connected in series across an ac source that has voltage amplitude 520V . The rate at which electrical energy is dissipated in the resistor is 234W. What is the amplitude of the voltage across the inductor
Polymer diffusion and Calibration of an optical tweezer
Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. If the original star rotated once in 35 days, find the angular speed of the neutron star
A 20kg suitcase is being pulled with constant speed by a handle that is at an angle of 22degrees above the horizontal. what is the force F applied to the handle
Suppose the traffic light is hung so that the tensions T1 and T2 are both equal to 84.7 N. Find the new angles they make regarding the x axis. (By symmetry, these angles would be the same.)
Compressed air can be pumped underground into huge caverns as a form of energy storage. The volume of a cavern is 4.9 Ã- 105 m3, how many homes could this internal energy serve
A golf club strikes a 0.045-kg golf ball in order to launch it from the tee. find With what speed does the ball leave the club
At what angle should the highway engineer bank. What is the magnitude of the acceleration.
The current in a 100 watt lightbulb is 0.900A . The filament inside the bulb is 0.120mm in diameter. What is the electron current in the filament
How much heat transfer is nec to raise the temp of a .200kg piece of ice from -20C to 130C including the energy needed for phase changes
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