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A 4 ft concrete post is reinforced with four steel bars, each with a 3/4" diameter. Knowing that Es = 29 x 106 psi and Ec = 3.6 x 106 psi, determine the normal stresses in the steel and in the concrete when a 150 kip axial centric force P is applied to the post.
An elevator descends from rest with an acceleration of 5 ft>s2 until it achieves a velocity of 15 ft>s. Determine the time required and the distance traveled.
three kilograms of air is in a pistoncylinder keeping constant pressure at 27 celsius 300 kpa. it is not heated to
two blocks a and b are connected by a cord passing over two pulleys c and d and e and f. at t 0 block a starts moving
a pump accepts liquid water at 60 acircdegf and 14 psia and compresses it to a pressure of 100 psia. the pump has a
a propeller driveshaft is to transmit 2500 hp at 75 rpm. it is to be made of aisi 1040 wqt 1300 steel. use a design
hot water at 90c enters a 15-m section of cast iron pipe whose inner diameter is 5.3 cm at an average velocity of
in each case calculate the biot number for the object and indicate whether or not the lumped approximation is valid.a a
a crate with mass 50kg is pulled up a 30 degree incline by a person pulling on a rope that makes a 30 degree angle with
a promising method of power generation involves collecting and storing solar energy in large artificial lakes a few
consider fully developed constant-property laminar flow between parallel planes with constant heat rate per unit of
large cylindrical bales of hay used to feed livestock in the winter months are d2m in diameter and are stored
1. what is the second law of thermodynamics?2. what is isentropic flow and what are the two key assumptions required?3.
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