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How significant is the broadening of a nsec pulse laser in the optical fibers? Their fiber was quartz, 2.5 m long, 600 um in diameter, with numerical aperture in air of 0.22. Let's assume you sent an idealized pulse of 337 nm light (from the N2 laser) with zero temporal width into the fiber. Calculate the minimum and maximum flight times using ray approximations and thereby report the broadening due to the fiber geometry alone. Is this significant for nsec pulses?
A man is holding an 8.00-kg vacuum cleaner at arm's length, a distance of 0.550 m from his shoulder. What is the torque on the shoulder joint if the arm is horizontal
A 2.2 A current is flowing in a 18 H inductor. A switch is opened, interrupting the current in 2.0 ms. Find the induced emf in the inductor
A ball is dropped from rest at the top of a 480 meter tall building. What is the total time that the ball takes to reach the ground
It is common to see birds of prey rising upward on thermals. The paths they take may be spiral-like. Find the magnitude of the bird's acceleration
a drawbridge with a weight of 5000 n is supported by a hinge and rope and is in static equilibrium. the length of the drawbridge, l, is 5 meters, what is the tension force the rope provides
When an elevator accelerates downward at 1.8m/s2, the floor of the elevator exert a 560N force on a passenger. What is the mass of the passenger
Helicopter blades withstand tremendous stresses. Calculate the centripetal acceleration at the tip of a 4.00 m long helicopter blade that rotates at 300 rpm
A cylindrical piece of metal 8.50 cm tall with a radius of 1.95 cm has a specific gravity = 4.0, what is the mass of the cylinder in units of grams
A bullet emerges from the muzzle of agun with a speed of 300m/s. calculate the time for the bullet to travel the lenght of the barrel, assuming the force is zero at the end of the barrel
A 4.50 kg penguin runs onto a huge horizontal sheet of frictionless ice. The sheet lies on the xy-plane. At t = 0 s it is at x = 0 m and y = 0 m by an initial speed of 0.71 m/s along the positive x-axis. It slides while being pushed with the wind wit..
The fundamental frequency of a pipe that is open at both ends is 560 hz . a) How long is this pipe? Use v = 344m/s . b) If one end is now closed, find the wavelength of the new fundamental. c) If one end is now closed, find the frequency of the new f..
At a height of 1500m, a dive bomber in a vertical dive at 300 km/h shoots a cannon at a target on the ground. What will be the impact speed of the projectile on the ground
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