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A set of steel reinforcing rods is to be stretched axially in tension to create a tensile stress of 30ksi prior to being cast in concrete to form a beam. Determine how much force will be required to stretch them the required amount and how much deflection is required. There are 10 rods, each is 0.75 in in diameter and 30 ft long. Assume Young's modulus of Elasticity for steel to be E=3x10^6 psi.
one cubic foot 1 ft3 of air is contained in a piston - cylinder arrangement. the axis of the cylinder is oriented in
in pure copper at room temperature there is about one atom vacancy every 1010 atom sites. at the melting temperature
a gear of mass 2.5kg rotates ar 1500rpm.due to an error in manufacture the centre of gravity of the wheel is displaced 0.5mm from the axis of rotation. calculate the out of balance force.
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.
a ball is thrown vertically up with a velocity of 91 ftsec at the edge of a 190-ft cliff. calculate a the height h to
a mummy picks up a calculator and starts adding odd whole numbers together in order 135....etc. what will be the last
a cylinder of metal that is originally 100mm tall and 50mm in diameter must be open die forged to a height if 50mm. the
what is the pressure difference over the manometer in newtons per meter?
a 20-lb force is applied to the control rod ab as shown. knowing that the length of the rod is 9 in. and that alpha 25
Consider a thermal energy reservoir at 1500 K that can supply heat at a rate of 150,000 kJ h-1. Determine the exergy of this supplied energy, assuming an environmental temperature of 25 oC.
Determine the stress in a stay at a given temperature. A steel 'stay' of effective length 5m is fitted in between the walls of a ships refrigerated compartment when the temperature is 18 degrees centigrade.
the acceleration of gravity g as a function of elevation z above sea level is given by g 32.17 - 3.32x10-6 z where g
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