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The core of an optical fiber has an index of refraction of 1.27, while the index of refraction of the cladding surrounding the core is 1.17. What is the critical angle for total internal reflection at the core-cladding interface?
Two people carry a heavy electric motor by placing it on a light board 1.55 m long. One person lifts at one end with a force of 420 N, Where along the board is its center of gravity located
The moon's diameter is 3.48 x 10 6 m, and its mean distance from the earth is 3.85 x 10 8 m. what is the diameter of the moon's image on the screen
q1. suppose you discover a type ia supernova in a distant galaxy. at maximum brilliance the supernova reaches an
A 1840 W. radiant heater is constructed to operate at 115 V. What is the resistance (in ohms) of the heating coil
A small compass is held horizontally, the center of its needle adistance of 0.120 m directly north of a long wire that isperpendicular to the earth's surface.
A cylindrical beaker of height 0.100 and negligible weight is filled to the brim with a fluid of density = 890 . When the beaker is placed on a scale, its weight is measured to be 1.00 .(Figure 1)
a golf ball strikes a hard smooth floor at an angle of 22.1 deg and as the drawing shows rebounds at the same angle.
A herd of wild horses races across the flat, open plains of the Great Basin in central Nevada. If the horses are running at 12.1 m/s at a compass heading of 286 degrees, illustrate what is the northward component of their velocity?
A woman with a mass of 70 kg climbs a set of stairs that are h = 3 m high. How much gravitational potential energy does she gain
The drawing to the left shows a mass m= 1.5 kg hanging from a spring with spring constant k = 10 N/m. What is the time required for the amplitude of the resulting oscillations to fall to one third of its initial value
The length of a simple pendulum is 0.73m, the pendulum bob has a mass of 307 grams, and it is released at an angle of 12° to the vertical. With what frequency does it vibrate? Assume SHM. What is the pendulum bob's speed while it passes through th..
A 658-kg boulder is dropped into a mine shaft that is 2.1 x 103 m deep. During the boulder's fall, the system consisting of the Earth, Determine the binding energy (in Joules) of the Earth-boulder system
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