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In the diving pool in the Richards Building, there is a glass window under the water. There is a room full of air on the other side of the glass window pane. If I dive under the water and look at the window, I notice that I can see the room on the other side of the window only through a certain area. Outside that circle, light undergoes total internal reflection at the surface between the glass and the air, and the window appears like a mirror. If I am 1.01 m from the window, find the radius of the circle. The index of refraction of water is 1.33, and the index of refraction of glass is 1.52. Be sure to take into account that the light ray which is refracted at the glass-air surface is also refracted at the glass-water surface and changes direction there too.
A person with perfect pitch sits on a bus bench listening to the 438 Hz horn of an approaching car. If the person detects a frequency of 475 Hz, how fast is the car moving
q1. a tiger leaps horizontally from a 5.9 m high rock with the speed of 3.4 ms. how far from the base of the rock wills
a manufacturer of fasteners uses a four die nut former to produce blanks and the piercer punch began to break down
A rock is dropped from a height of 100 m above the ground. How long after the ball is thrown will the objects be at the same height above the ground
A railroad locomotive with a mass of can exert a force of. At what rate can it accelerate when pulling a train
A cowboy at a dude ranch fills a horse trough that is 1.5 m long, 60 cm wide and 40 cm deep. He uses a 2.0cmdiameter hose from which water emerges at 1.5m/s. How long does it take him to fill the trough.
A barefoot field-goal kicker imparts a speed of 26 m/s to a football at first at rest. If the football has a mass of 0.24 kg and the If the football has the mass of 0.24 kg and the time of contact with the ball is 0.037 s, what is the force exerte..
A fisherman in a stream 36 cm deep looks downward into the water and sees a rock on the stream bed. How deep does the stream appear to the fisherman
A solid cylinder rolls down an incline plane without slipping. If the center of mass of the cylinder has a linear acceleration of 2.67 m/s2
At a certain instant, the earth, moon, and a stationary 1500-kg spacecraft are at the vertices of an equilateral triangle of length 3.84 × 108 m. What is the magnitude of the net gravitational force acting on the spacecraft
An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to the flywheel as shown in the figure below. The flywheel is a solid disk with a mass of 57.0 kg and a radius R = 0.625 m...
A spherical balloon of volume 3.94 103 cm3 contains helium at a pressure of 1.15 105 Pa. How many moles of helium are in the balloon if the average kinetic energy of the helium atoms is 3.60 10-22 J?
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