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Problem: Fifteen multimode glass fibers (n1 = 1.48, n2 = 1.46) are spliced together. Each fiber is 2 km long and has a loss rate 2-db/km. each splice adds 1 dB of loss. If the output power of the source is 5 dBm and radiates uniformly in a 60o half cone, how much power (in dBm) is delivered to the photo detector of this combined fiber? (Try to be precise)
a at what distance from a 10w point source of electromagnetic waves is the electric field amplitude 120vm ?b at what
A 75-kg canoeist stands in the middle of her 20-kg canoe. The canoe is 3.0 m long, Calculate the distance from the canoeist to shore
The ultrasonic transducer used in medical ultrasoundimaging, is a very thin disk ( m =0.10g) driven back and forth in SHM at 1.0 MHz by an electromagnetic coil.
An uncharged 20 F capacitor is connected to a power supply set to 10 V. How much charge flows onto the capacitor plates, how much more charge flows onto the plates
Two small plastic spheres are given positive electrical charges. When they are a distance of 14.8cm apart, What is the charge on the second sphere
A sailboat sails 180 km west, then 210 km southeast, and then 280 km at 30° east of north. Find the magnitude and the direction of the last leg of the journey
There is evidence that elephants communicate via infrasound, Determine the intensity level of the infrasound 10 km from the source, assuming the sound energy radiates uniformly in all directions
A certain gyroscope consists of a uniform disk with a 48 cm radius mounted at the center of an axle that is 12 cm long, what is the precession rate
the lens of a slide projector with a focal length of a 120 mm projects a slide onto a screen that is 13 m away. how far
A steel wire strung between two supports is initially horizontal when there is no tension on it. When a 9.5 kg painting is hung on the wire, the wire makes a 25° angle to the horizontal, as shown. Illustrate what is the diameter of the wire?
Find out the maximum height reached by the rocket.
A 79-kg person is exposed to 83 mrem of α particles (RBE = 12). How much energy (in joules) has this person absorbed
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