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The potential difference across a coil is 11V at an instant when the current through the coil is decreasing at a rate of 38A/s . What is the coil's inductance?
L=________H ?
The rate of rotation of the smooth-walled tub is chosen so that a small piece of cloth will lose contact with the tub when the cloth is at an angle of ? = 73.0° above the horizontal. If the radius of the tub is r = 0.455 m, what rate of revolution..
A new circus act is called the Texas Tumblers. Lovely Mary Belle swings from a trapeze, projects herself at an angle of 53, and is supposed to be caught by Joe Bob, whose hands are 6.10 above and 8.02 horizontally from her launch point. You can ignor..
To get the top spinning, its string is pulled with a tension of 0.30. Explain how long does it take for the top to complete the first five revolutions? The string is long enough that it is wrapped around the top more than five turns.
In the 1950s, an experimental train that had a mass of 2.30 x 10^4 kg was powered across a level track by a jet engine that produced the thrust of 5.30 x 10^5 N for a distance of 504 m. unless otherwise directed, suppose that air resistance is neglig..
A space station, in the form of a wheel 100m in diameter, rotates to supply an "artificial gravity" of 3.7m/s2 for persons who walk around on inner wall of the outer rim. Find out the rate of rotation of the wheel (in revolutions per minute) that ..
a bar magnet is dropped through a loop of wire, what is the direction of the current at the instant it is in the middle
What is the piston height if the temperature is 30C. How far apart are the plates if there's air between them.
Two identical piano wires have a fundamental frequency of 640 Hz when kept under the same tension. What fractional increase in the tension of one wire would lead to the occurrence of 10 beats/s when both wires oscillate simultaneously.
a falling flower pot passes a 1.5 m tall window of an apartment building in a time of .16 s. how fast was the pot falling at the top of the window? from what height above the top of the window was the pot dropped?
What is the minimum coefficient of friction between tires and road that will allow cars to take turn without sliding off the road.
What is the maximum distance we can shoot a dart, from ground level, provided our toy dart gun gives a maximum initial velocity of 2.78 m/s and air resistance is negligible
A hunter aims directly at the target (on the same level) 115 m away. If the bullet leaves the gun at a speed of 205 m/s, by how much will it miss target.
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