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A hawser is wrapped two full turns around a bollard. By exerting an 80-lb force on the free end of the hawser, a dockworker can resist a force of 5000 lb on the other end of the hawser. Determine
(a) the coefficient of static friction between the hawser and the bollard,
(b) the number of times the hawser should be wrapped around the bollard if a 20,000-lb force is to be resisted by the same 80-lb force.
Design economical sustainable solar charging substitutes to the universities current method. This applies to both applications for university golf carts and student use on campus.
How can you tell what kind of primary atomic bonding is present by noting where the involved elements are located on the periodic table? Describe how the electron negativity difference between atoms affects the ionic/covalent character of a bond.
many bridge designs today contain simple geometrical components but are constructed into complex ways to ensure that
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a helium gas is heated at constant volume from 100kpa 300k kelvin to 500k. a following process expands the gas at
The modulus of elasticity for a ceramic material having 5 vol% porosity is 296 GPa (43x10^6 psi). (a) Compute the modulus of elasticity for the nonporous material. (b) At what volume percent porosity will the modulus of elasticity be 231 GPa (33x10^6..
a piston has an area of 500 mm2. what mass must the piston has if it exerts a pressure of 50 kpa above atmospheric
a tensile force of 4200 lbs is applied to a 9 feet long 8515 brass rod. an elongation of 0.36 inch is measured on the
Schematically draw the evolution of the microstructure of Fe-C alloy as T decreases from 1000C to 500C, with the following composition (wt % of C)
Determine the n- and t-components of the force F which is exerted by the rod AB on the crank OA.
the king and his two children are imprissoned at the top of a tall tower.stonemasons have been working on the tower and
a 180-lb man and a 120-lb woman stand side by side at the same end of a 300-lb boat ready to dive each with a 16-fts
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