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1. Find the critical angle for an optical fiber whose core has n value of 1.55 and whose cladding has n value of 1.20. Please show work.
a 500 g ball swings in a vertical circle at the end of a 1.5-m-long string. When the ball is at the bottom of the circle the tension in the string is 15 N. What is the speed of the ball at that point?
A 130 kg crate is pushed at constant speed up the frictionless 28° ramp. What force is exerted by the ramp on the crate
Compute the voltage between the surface and the axis of a uniformly charged infinite cylinder of radius a
Define a lie in the strict or formal sense and explain what is meant by communication - what is the principal purpose of communication?
A tsunami is generated by an earthquake off the coast of Alaska. It has a wavelength of 677 km. It travels at a distance of 3536 km in a period of 5.49 hr. What is the frequency of the wave in Hz?
A long straight wire carries a current I1 = 3.2 A and is a distance h = 12.2 cm from a rectangular current loop that carries a current I2 = 1.2 A, What is the force exerted by the current loop on the wire
A simple pendulum consists of a ball connected to one end of a thin brass wire. find the change in the period of the heated pendulum
True false questions on physics
A 423 Hz sound wave travels through a substance. What is the speed of sound in the substance
Suppose that you wish to fabricate a uniform wire out of 0.850 g of copper. Assume the wire has a resistance R = 0.600 ?, What will be the diameter of the wire
The Earth can be approximated as a sphere of uniform density, rotating on its axis once a day. The mass of the Earth is 5.97×1024 kg, the radius of the Earth is 6.38×106 m, and the time of rotation for the Earth is 24.0 hrs.
A helium-neon laser of the type often found in physics laboratories has a beam power of 4.00 mW at a wavelength of 633 nm. Calculate the intensity of the focused beam
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