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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)
the total lung volume for a person is 6.20 . a person fills her lungs with air at an absolute pressure of 1.00 . then
a 1cm-tall object placed 20cm front of a concave mirror produces a virtual image that is twice the height of the object. what is the length of the mirror
A 55g ball of clay traveling at speed v 0 hits and sticks to a 1.3kg kg block sitting at rest on a frictionless surface, What percentage of the ball's initial energy is "lost"
A piano is brought upstairs by two workers. Due to a mistake by one of the workers, the piano rolls down the stairs and finally comes to rest by the outside door.
the radius of electron is 10 -18 m . what is the minimum momentum transfer order of magnitude required to resolve the
a spaceship travels in a circular orbit around a planet. it applies a sudden thrust and increases its speed by a factor
Calculate the magnetic moments that are possible for the n=3 level of Hydrogen, making use of the quantization of angular momentum. You may neglect the existence of spin. Compare this with the Bohr prediction for n=3.
In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 2.7 kg book is pushed from rest through a distance of 0.70 m by the horizontal 32 N force from the broom and..
As an admirer of Thomas Young, you perform a double-slit experiment in his honor. How far on the screen are the first bright fringe and the second dark fringe from the central bright fringe
Three flat layers and transparent material are stacked upon one another. at what angle of incidence will a ray of light traverse the three layers in a single straight line
While a roofer is working on a roof that slants at 42.0 degrees above the horizontal, If it starts 4.35 m from the lower edge of the roof, how fast will the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on ..
What is the width of a slit for which the first minimum is at 45o when the slit is illuminated by a helium-neon laser
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