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A steel ball (specific heat = 0.46 kJ/kgK. and thermal conductivity = 35 W/mK) having 5 cm diameter and initially at a uniform temperature of 450oC is suddenly placed in a control environment in which the temperature is maintained at 100oC.
Calculate the time required for the balls to attained a temperature of 150oC. Take h = 10W/m2K.
often the assumption is made that the flow of a certain fluid can be less than 2. if air is flowing through a tube such
the position of a crate sliding down a ramp is given by x 0.25t3 y1.5t2 z6-0.75t2.5 all in units of m where t is in
Consider steady-state conditions for which the interior surface of the window is exposed to quiescent air at 10°C, while the exterior surface is exposed to air at -10°C moving in parallel flow over the surface with a velocity of 20 m/s. Determine ..
carbon monoxide and water vapor react in stoichiometric amounts to form carbon dioxide and hydrogen.the feed enters at
a 0.075 kg ice cube at 0 degree c is dropped into an insulated styrofoam cup holding 0.33 kg of water at 25.0 degree c.
Is it possible to conduct a valid plane strain fracture toughness test for CrMoV steel alloy under the following conditions: Kic=53 MPa.m^(1/2), sigma(ys)=620 MPa, W=6 cm, and plate thickness t=2.5 cm?
the entire assembly is placed in an environment whose temperature is 200c. determine the volume of chamber 1 when thermodynamic equillibrium has been estabilished.
a train which is traveling at 80 mihr applies its brakes as it reaches point a and slows down with a constant
Develop an expression for the average convection coefficient, hturb(x), as a function of distance from the leading edge, x, for the turbulent region, xc x L.
A U-tube manometer filled with water, density 1000 kg/m3 shows a height difference of 25 cm. What is the gauge pressure?
A cylinder with an area ratio of 0.2 and a bore diameter of 7.5 cm steadily extends a 13.3 kN load. If the cap-side pressure is 4 MPa and the rod-side pressure is 250 kPa, what is the force ecienccy of the actuator?
design a stationary steam power plant operating on an ideal closed loop rankine cycle that can deliver 85 mw of net
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