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A .25" x .25" square specimen of a material of yield strength 50000 psi is loaded to this yield point and released. The modulus of elasticity of the materials is 30 X 10^6 psi. Orginal gage length is 2". What is the force required to load the speciment to yeild point? What is the length of the specimen when the load is held at yield point and what is the length of the specimen when the load is released?
35MW of power at 45kV (rms) arrives at a town from a generator via 3.4? transmission lines. Calculate the fraction of the power generated that is wasted in the lines
A baseball coach shouts loudly at an umpire standing 3.8 meters away. If the sound power produced by the coach is 2.2 × 10?3 W, what is the intensity of the sound when it reaches the umpire? Answer in units of W/m2.
A puck of mass m = 1.40 kg slides in a circle of radius r = 20.0 cm on a frictionless table while attached to a hanging cylinder of mass M = 2.90 kg by a cord through a hole in the table
An explosion breaks an object originally at rest into two fragments. One fragment acquires twice the kinetic energy of the other. What is the ratio of their masses
A 500-kg elevator is pulled upward with a constant force of 5500 N for a distance of 50.0 m. What is the net work done on the elevator
Your are sitting in your car, which is standing at the side of the road with the engine idling. After what distance will you catch up with your classmate
Consider a piston weighing 990 g which contains 10 g of air at 1 atmosphere and 25?C. Calculate the effects of performing 100 Joule of work on this air-containing piston for the following three situations.
(a) In what direction are the electrons deflected? toward the negative plate toward the positive plate (b) By how much are the electrons deflected after passing through these plates?
A crate of eggs is located in the middle of the flat bed of a pickup truck as the truck negotiates a curve in the flat road. how fast can the truck be moving without the crate sliding
The diffraction pattern shown in the figure is produced by passing laser light ( = 620 nm) through a single slit and viewing the pattern on a screen 1.84 m behind the slit, What is the width of the slit
q1. sunlight enters a room at an angle of 32 above the horizontal and reflects from a small mirror lying flat on the
A satellite has a mass of 6155 kg and is in a circular orbit 4.76 × 105 m above the surface of a planet. What would be the true weight of the satellite if it were at rest on the planet's surface
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