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A 1.80 mH inductor is connected in series with a dc battery of negligible internal resistance, a 0.840 k-ohm resistor, and an open switch. 1.How long after the switch is closed will it take for the current in the circuit to reach half of its maximum value ? 2.How long after the switch is closed will it take for the energy stored in the inductor to reach half of its maximum value?
A 1.00 kg object is attached to a horizontal spring. The spring is initially stretched by 0.200 m, What is the maximum speed of the object
The Navy operated a "man-rated" centrifuge in Warminster, PA. It was used for testing with the astronauts of the Mercury, What is the period of the gondola at that speed
A person pushes a 16.0 kg shopping cart at a constant velocity for a distance of 26.0m. what is the magnitude of the force that the shopper exerts
To a first approximation, the velocity of sound in air for different temperatures can be calculated as v=(331+0.6T) m/s, How far away was the lightning
A bullet is shot out of a gun with a 61 cm barrel at a speed of 410 m/s into a block of wood. The bullet enters the wood 13 cm. Illustrate what force does the block exert on the bullet? What is the time it takes?
A small spherical mass of 8.25 × 10-2 kg and charge of q2 = - 0.40 µC hangs from a thread. What is the tension in the thread
In bouncing off a racket, a 50 g tennis ball had its velocity changed from 15 m/s in the forward direction to 20 m/s, how long was the ball in contact with the racket
a ball moving with speed v collides with a horizontal smooth surface at an angle ? with normal to surface. if
The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 12-g nail
A proton is released from rest at the positive plate of a parallel-plate capacitor. What will be the proton's final speed if the experiment is repeated with double the amount of charge on each capacitor plate
A smaller solenoid is placed inside a larger solenoid so they have the same axis (like concentric cylinders). The inner solenoid has radius r=0.01meters, N=1000turns, and resistance R=10Ohms. Its two leads are connected to an ammeter to form a circui..
ms.smith is planning her classroom. she knows she has approximately 12 linear meters of available wall space. she likes
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