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1) A steel cable 1.25 inches in diameter and 50 ft long is to lift a 40,000 lb weight. What is the length of the cable during lifting? The modulus of elasticity of the steel is 30 x 106 psi. 2) A large flat plate is subjected to constant amplitude uniaxial cyclic tensile and compressive stresses. Compute the critical crack length if the fatigue life must be at least 3 x 106 cycles. Assume the initial maximum edge surface crack length to be 1.1 mm, and a maximum tensile stress of 160 MPa. Assume m=3.0, A=1.4 x 10-13 MPa in meter units, and Y=1.2. 3) Using the attached figure, for a Cu-20% Wt Ag alloy, determine the phases present, their percentage amounts, and their compositions at
a. 1000 degrees Centigradeb. 781 degrees Centigradec. 779 degrees Centigrade.
Consider an atom with four (and only four) energy levels. Suppose that the four energy levels were somehow evenly spaced. How many spectral lines would result
a certain light truck can go around a flat curve having a radius of 150 m with a maximum speed of 34.0 ms. with what
A 36.8-kg boy, riding a 2.63-kg skateboard at a velocity of +4.87 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, What is the skateboard's velocity relative to the sidewalk at this instant
A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 15 in 10.6. What force is required at the edge
What is the value of g at the location of this satellite?
a spherical mirror is polished on both sides. when the concave side is used as a mirror the magnification is 3.7. what
1. Does motion in the horizontal (x) direction affect length in the y- and z-directions? ANSWER "YES" OR "NO":2. What were the two assumptions that Einstein used to build his theory (referencing above)?
A 32.0 cm violin string with linear density 0.66 g/m is placed near a loudspeaker that is fed by an audio-oscillator of variable frequency. It is found that the string is set in oscillation only at frequencies 880 and 1320 Hz. as the frequency of osc..
Consider a pair of forces, one having a magnitude of 30 N, andthe other having a magnitude of 40 N. What maximum net forceis possible when combining these two forces? What is theminimum net force possible?
Starting from rest, a 6.70 kg object falls through some liquid and experiences a resistive (drag) force that is linearly proportional to the velocity of the object. What is the terminal speed for this object in this liquid
Derive the equation you are going to use to determine the specific heat of a metallic ball
Kathy is changing the tire of her car on a steep hill 20.0 m high.She trips and drops the 10.0-kg spare tire, What is the speed of the tire at the top of the next hill
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