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The bending moment at a point in a beam of elastic modulus (E) is M. Determine the ration of the maximum stress for a solid square cross section side length- S, to a hollow square cross section -side length-D and wall thickness (t=D/10) of the same cross sectional area?
heat is conducted along a circuit board that has a copper layer on one side. the circuit board is 15 cm long and 15 cm
the system is at rest in the position shown with the 12-lb collar a resting on the spring k 20 lbft when a constant
when deciding what propulsion system is most appropriate for a mission thrust and isp are not the only parameters that
(a) Determine the blade angles at leading and trailing edges of both the rotor and stator at the mean radii, (b) Calculate the mass flow rate and the power required for each stage.
the particle has a mass of 0.5 kg and is confined to move along the smooth horizontal slot due to the rotation of the
Hollow shaft transmitting power with shear limits. Design a hollow steel shaft to transmit 300 hp at 75 rpm without exceeding a shear tress of 8000 psi. Use 1.2:1 as the ratio of the outside diameter to the inside diameter.
a large fireplace in a ski lodge has a glass firescreen which covers a vertical opening in the fireplace. the opening
consider a 20-l evacuated rigid bottle that is surrounded by the atmosphere at 100 kpa and 27 celsius. a valve at the
an electric motor of total weight 3330 pounds is mounted on a simply supported beam with an overhang as shown
initially an insulated rigid tank contains 18.67 kg of water at 21.45oc and 101 kpa. the tank also contains a 3.66 kg
at room temperature 23oc a cylinder of steel has a diameter of 15.02 mm which is too large to fit into a 15 mm diameter
it is observed that the time for the ball to strike the ground at b is 2.5 s. determine the speed va and angle ua at
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