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After falling from rest from a height of 32 m, a 0.45 kg ball rebounds upward, reaching a height of 22 m. If the contact between ball and ground lasted 1.5 ms, what average force was exerted on the ba
A cylindrical soil sample, 7.3 cm in diameter and 16.8 cm long, is tested in a Constant Head Permeability Apparatus. A constant head of 75 cm is maintained during the test.
A cylindrical specimen of a brass alloy 10.0 mm (0.39 in.) in diameter and 120.0 mm (4.72 in.) long is pulled in tension with a force of 11,750N (2640 lbf); the force is subsequently released.
A ball is thrown with a velocity of 25m/s at a building. The building is 20m high; the man throwing the ball is 40m from the front wall and is standing in depression so that the ball leaves at his han
A manufacturer of rat poison in Texas proposes to build a circular lagoon to concentrate the arsenic in its rinse water by evaporation. The rinse water is produced at a rate of 10,000 gpd (gallons per
Chromate waste is concentrated by evaporation in a series of shallow flow through reactor tanks connected by a short length of pipe. The first tank in the series has a volume of 4500 ft3.
A 2.50-g sample of a large biomolecule was dissolved in 25.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C.
A 200 lb homogeneous gate of 10 ft width and 5 ft long is hinged at point A and held in place by 12 ft long brace as shown in fig. As the bottom of the brace is moved to the right, the water level rem
Draw the shearing force diagram and the moment diagram of the following problem. The beam is indeterminate. You need to integrate the moment twice to get a formula for the deflection v(x).
A bar of the cross section is shown in Figure 3 and is made of steel that is assumed to be elastoplastic with E=200GPa and σ y=240 MPa. For the bending about the z-axis.
Explain how the desert air can contain much more h2o vapor in the air than the pole, and still a lower humidity than the pole?
An elevator drive sheave of diameter 1 m and negligible mass is mounted on a shaft midway between bearings, which are 800 mm apart. Under the worst conditions the rope tensions are 25 kN on
Three different materials, designated A, B, and C, are tested in tension using test specimens having diameters of 0.755 in. and gage lengths of 2.5 in.
A body slides down a frictionless plane and during the third second after starting from rest if it travels 20.4m. What is the angle of inclination of the plane?
Two particles start from the same point along the same straight line and at the same instant. The first particle travels with a constant velocity v and the second with a constant acceleration.
Physics two skaters with masses of 65 kg and 45 kg, respectively stand 8.0 m apart each holding one end of a rope.
Note the wide U-shaped profile of the upper (outer) portion of the valley as opposed to the steep V-shaped profile of the lower (inner) portion of the valley. Can you explain why this form exists? Is
Bernard is a principal in a consulting engineering firm. He is also a principal owner in a construction contracting firm. In his role as consultant, Bernard prepared plans for the design of a roof str
The 50-lb block rests on the rough surface for which the coefficient of kinetic friction is 0.2. A force F = (40 + s^2) lb, where s is in ft, acts on the block in the direction shown.
Assume that the player strikes the cue ball so that it impacts the eight ball with velocity v, sufficiently large to knock the eight ball into the side pocket, and that the impact is elastic.
The block has a mass of 150 kg and rests on a surface for which the coefficients of static and kinetic friction are 0.5 and 0.4, respectively.
A 25-ft long crane supported at its lower end by a pin is elevated by a horizontal cable as shown in the figure. A 250-lb load is suspended from the outer end of the crane.
The 50-lb load is hoisted by the pulley system and motor M. If the crate starts from rest and by constant acceleration attains a speed of 15 ft/s after rising s = 6 ft, determine the power t
The opponents of globalization focus their criticism on the role of globalization in homogenizing the world and driving wages and prices to a minimum.
A piece of stone m=5kg is attached to a string with length r=80 cm and is rotating in a VERTICAL circular path with constant speed of v=10m/s