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The lunar excursion module has been modeled as a mass supported by four symmetrically located legs, each of which can be approximated as a spring-damper system with negligible mass (see Fig. 2.121). Design the springs and dampers of the system in order to have the damped period of vibration between 1 s and 2 s.
a steel plate is to be attached to a support with three bolts. the plate is 50 mm wide and 11.2 mm thick and the yield
A sheet of BCC iron 1.7-mm thick was exposed to a carburizing atmosphere on one side and a decarburizing atmosphere on the other side at 725°C. After having reached steady state, the iron was quickly cooled to room temperature. The carbon concentrati..
Investigate the effect of flow direction on the heat rate (W/m) for (a) horizontal, (b) downward, and (c) upward flow.
Obtain the differential equation and the boundary and initial conditions that could be solved to determine the tem- perature as a function of position and time in the bar.
An inventor claims to have developed a device that executes a power cycle while operating between reservoirs at 500 and 300 K that has a thermal efficiency of (a) 45%, (b) 40%, (c) 35%. Evaluate the claim for each case.
the rate of heat transfer to the surroundings from a person at rest is about 400 kj per hour. suppose that the
The solid circular aluminium rod has a diameter d=40 mm and can be subjected simultaneously to a torque T in the direction shown and to a tensile axial load P. The modulus of elasticity is E=73 Gpa, and the shear modulus G= 28 Gpa.
An ordinary egg can be approximated as a 5.78 cm diameter sphere. The egg is initially at a temperature of 7.9C and is dropped into boiling water at 97C. Taking the properties of the egg to be p=1020 and cp=3.32. Determine how much heat is transferre..
A design specification report on existing ECT system, detailing the finite element analysis procedure carried out when simulating the design to the loading modes in marine conditions within the second and sixth week of the project.
Estimate average values of the fin heat transfer coefficients for free convection (hc) and radiation exchange (hr). Use these values to predict the tip temperature and fin effectiveness.
a .5 inch solid bar is to be tested for its strength by applying a torsional force until the bar completely brakes in
water is flowing in a 2cm radius pipe with a parabolic velocity profile vxrvmax1-rro2 where ro is the radius of the
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