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A woman is holding a 3.6-kg sphere in her hand with the entire arm held horizontally as shown in the figure. A tensile force in the deltoid muscle prevents the arm from rotating about the shoulder joint O; this force acts at the 21° angle shown. Determine the force exerted by the deltoid muscle on the upper arm at A and the x- and y-components of the force reaction at the shoulder joint O. The mass of the upper arm is mU = 1.9 kg, the mass of the lower arm is mL = 1.1 kg, and the mass of the hand is mH = 0.4 kg; all the corresponding weights act at the locations shown in the figure.
Find a cylindrical container that is large enough that it takes at least one minute to drain (you may have to create an opening at or near the bottom that gives the right behavior.
a coast guard cutter detects an unidentified ship at a distance of 19.6 km in the direction 17.8deg east of north. the
a piston-cylinder assembly contains 1kg of water initially occupying a volume of 0.5m3 at 1bar. energy transfer by heat
What are the percentages of the total heat absorption taking place in the economizer, boiler drum and the superheater, respectively? Assume cp of air and water as 1.005 kJ/kg K and 4.2 kJ/kg K, respectively.
In this project we consider two very different problems. First, we design cylindrical shells subjected to hydrostatic pressure. We consider two possible modes of failure, i.e. the loss of stability and failure due to the loss of strength. The seco..
A stream consisting of two organic chemicals: 1) Benzene (C6H6) and 2) Toluene (C7H8), enters a separation column. The total mass flow rate of the stream is 10,000 lbm/hr (pounds/hour). The mass percent of benzene in the stream is 40%.
Determine the largest bending moment that can be applied without exceeding either of the following allowable normal stresses: +7 ksi and -12 ksi.
Critically evaluate the concepts of fluid mechanics and critically evaluation of the principles of CFD (Computational Fluid Dynamics) to the requirements of the mechanical industry.
for n2 gas cpm is nearly constant at 3.5r 29.1 jmol k for temperatures in the range 100 to 400 k and for low or
Model the earth as a sphere with a diameter of 8,000 miles. Using 14.7 psia as the average pressure at the earth's surface and ignoring variation in g with altitude, estimate the weight of the earth's atmosphere in lbf, and its mass in lbm.
In the wind tunnel experiment, four wall taps are used to measure pressure. Are those wall taps used to measure pressure of the air very close to the wall surface? What is the velocity of air close to the wall surface? Are the wall taps used to measu..
In air-conditioning systems, streams of cold and warm air are mixed to get air with the right temperature. Consider a mixing chamber into which cold air enters at 8C and 100 kPa at a rate of 0.55 m^3 /s and warm air enters at 300C and 100 kPa. The ra..
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