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The glass core of an optical fiber has an index of refraction 1.61. The index of refraction of the cladding is 1.47. What is the maximum angle a light ray can make with the wall of the core if it is to remain inside the fiber?
The toadfish makes use of resonance in a closed tube to produce very loud sounds. The tube is its swim bladder, used as an amplifier. Calculate the intensity of the sound wave emitted
A square, 0.67 m on a side, is mounted so that it can rotate about an axis that passes through the center of the square. What is the magnitude of the maximum torque
A 4.00-kg particle moves along the x axis. Its position varies with time according to x = 3.0t + 2.0t^2 where x is in meters and t is in seconds. Find the acceleration of the particle
About 27% of the body of a person floating in the Dead Sea will be above the water line. find the density of the water in the Dead Sea
Air at 90 kpa and -10 C enters an adiabatic diffuser steadily with a velocity of 180 m/s and leaves with a low velocity at a pressure of 100 kpa. The exit area of the diffuser is 4 times the inlet area. Determine (a) the exit temperature and (b) the ..
Eight identical light bulbs are connected in parallel with a 120-V power source, by two long leads with resistance 1.4 Ohms. 210 mA flow through each bulb, What is the resistance of each bulb
At a rock concert, a dB meter registered 130 dB when placed at a2.8 m in front of a loudspeaker on the stage. (a) what was thepower output of the speaker assuming uniform spherical ofthe sound and neglecting absorption in the air?(b) how far awaywoul..
A 420g oscillator has a speed of 128.5cm/s when its displacement is 3.30cm and 59.5cm/s when its displacement is 5.40cm .what is the oscillator's maximum speed
Determine the kinetic energy of the proton moving in the labarotory towards a stationary electron so that a neutron is the only final particle
A jetliner with an airspeed of 1000 km/hr sets out on a 1500 km flight due south. To maintain a southward direction, what is the wind velocity
A race car can be slowed with a steady acceleration of -11 m/s2 if the car is going 55m/s how many meters would it travel before it stops?
Suppose we have a gas in thermal equilibrium at temperature T. Each molecule of the gas has mass m. (a) What is the ratio of the number of molecules at the Earth's surface to the number at height h(with potential energy mgh)?
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