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An inductor has inductance of 0.340 H and carries a current that is decreasing at a uniform rate of 22.0 mA/s. Determine the self-induced emf in this inductor.
A cylindrical air duct in an air conditioning system has a lengthof 5.5 m and a radius of 7.2 x 10^-2 m. A fan forces air ( n = 1.8x 10^-5 Pa·s) through the duct, such that the air in a room(volume = 280 m^3) is replenished every ten minutes. Dete..
A biology student utilizes a simple magnifier to examine the structural features of the wing of an insect. The wing is held 3.75 cm in front of the lens, and the image is formed 26.0 cm from the eye. What is the focal length of the lens?
A parallel plate capacitor with a plate area of .8m^2 seperated by a .6mm mica sheet. The energy stored in the capacitor is
The hydrogen spectrum has a red line at 656 nm and a violet line at 434 nm. What angular separation between two spectral lines obtained with a diffraction grating that has 4920 lines/cm? (Assume that the light is incident normally on the grating.) fi..
Determine the ratio of the intensity at an angle of 0.135 degree from the centerline to the intensity at the peak of the central maximum
Microcontrollers usually do not include D/A converters but you can easily create a crude version of one usually signle digital I/O pin. This can be done by outputting a variable-width pulse train to an RC circuit.
A 4.00 kg hollow sphere of radius 5.00 cm starts from rest and rolls without slipping down a 30.0 degree incline. If the length of the incline is 50.0 cm, then the velocity of the center of mass of the hollow sphere at the bottom of the incline is:
A baseball (m = 149 g) approaches a bat horizontally at a speed of 42.8 m/s (96 mi/h) and is hit straight back at a speed of 48.4 m/s (108 mi/h). what is the average force exerted on the ball by the bat
A sound wave from a siren has an intensity of 88.8 W/m2 at a certain point, What is the intensity level of the sound wave due to the ambulance
An astronaut on a distant planet wants to decide its acceleration due to gravity. The astronaut throws a rock straight up with a velocity of + 18.3 m/s and gauges a time of 23.9 s before the rock returns to his hand. What is the acceleration (directi..
A 9300 kg boxcar travelling at 23 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 15 m/s. What is the mass of the second car.
You are riding a train as it rounds a curve of radius 400 meter at a constant speed. Obtain what is the speed of the train
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