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Molybdenum is utilized in high temperature situations because of it high melting point. It is silvery white in color, very hard, and has one of the highest melting points of all pure elements. Molybdenum on Earth is not found free but as a compound. The only pure Molybdenum that has ever been found was by the Russian Luna 24 Mission on the moon. Molybdenum is commonly used in rockets. Suppose that pure Molybdenum had been mined from the moon.
A spacecraft propulsion system is built using a slab of this pure Molybdenum in its construction. The pure Molybdenum slab has dimensions 8cm x 5cm. Due to energy generation, the bar is maintained at 1250° C. The slab is then subjected to convective heating due to a long burn maneuver. Here it is exposed to an ambient T∞=2000°C. Assuming the heat transfer coefficient is h=350 W/m2°C calculate the center temperature of the bar at t=5 minutes after the start of heating exposure.
A Brayton gas turbine cycle has two stages of compression and two stages of expansion. The pressure ratio across each stage of the compressor and turbine is 3. The air enters each stage of the compressor at 300K and each stage of the turbine at 1..
What is the nozzle-exit-to-throat area ratio for case (a)? The gross thrust is the contribution to engine thrust made by the exhaust nozzle only.
two hollow metal cylinders are to be press-fitted together. the outer steel member has outer and inner diameters of
State mathematically Newtona's law of viscosity. Water moves over a flat surface. At a point on the surface the velocity gradient is 60 s-1. The viscosity of water is 0.0012 Ns/m2. Calculate the wall shear stress.
an ideal brayton cycle with pressure ratio of 8.95 and air enters the compressor at 285k. find the amount of work in
the velocity in a two-dimensional flow field is given by the equation v i2xt - j2yt where the velocity is in ms when x
a heat exchanger is a device in which heat flows between two fluid streams brought into thermal contact through a
We learned that a room-full of gas is actually pretty heavy, and this can be used to our advantage. For example, if you want to measure something tall, you can measure the atmospheric pressure difference from its top to its base, and actually use tha..
Calculate the 2x4 Block's Weight, mass, density and Specific Weight. Express values in both metric and US units. Compute the force needed to completely submerge the object.
a six-cylinder four-stroke internal combustion engine with compression ratio of 17 and displacement volume of 4.5 l is
design a single axis sc attitude controllerassumptionsj 400 newtonmetersec squareddisturbance torque t sub d .01 nm
consider oxidation of a metal plate half-thickness x0 0.02m. after 800hours 2.88e6 seconds at 900 c the oxide layer
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