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A spherical copper shell, of inside radius 5cm and wall thickness 1cm, loses heat to the surrounding air, which is maintained at 25C. The inside surface of the shell is maintained at Ti=100C. The external heat transfer coefficient is h=10 W/m^2*K. What is the rate of heat loss to the ambient?
two spinning discs have the same angular momentum, but disk 1 has more kinetic energy than disk 2. Which one has the bigger moment of inertia - explain your reasoning?
develop equations which may be solved to give the final temperature of the gas remaining in a tank nbspafter the tank
water flows through a pipe at an average temperature of t70degc. the inner and outer radii of the pipenbspare r16cm and
Two solid cylindrical rods (1) and (2) are joined together at flange B and loaded. If the normal stress in each rod must be limited to 110 MPa, determine the minimum diameter D required for each rod.
Horsepower and efficiency of three-phase motor, If a fully loaded 440V, three-phase motor draws 12.4 A at 86% power factor (pf). It's speed is 1730 rpm and its torque output to a mechanical load is 29.1 lb-ft x 1.356 = 39.5 Nm.
The tank air pressure above the water level is 300kPa(absolute) while the atmospheric pressure is 100kPA. Neglecting frictional effects, determine the initial discharge rate of water from the tank.(Density of water=1000kg/m^3)
Determine the specified data for water at the states indicated and locate each state on a P-v and T-v diagram.
When these stops occur, it takes an average of 10.0 min to diagnose the problem and make repairs. Determine (a) line efficiency and (b) average actual production rate.
one part of the tank contain 2.5 kg of compressed liquid water at 60 C and 600 kPa while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. Determine the final temperature of the water and the..
At what location s will the combined moment of the weights of the man and platform about point B be zero.
a 0.2-cm-thick 10-cm-high and 15-cm-long circuit board houses electronic components on one side that dissipate a total
a simple pulley with the given radius r used to lift heavy objects is positioned 10 feet above ground level. Given that the pulley rotates theta degrees, determine the height to which the pulley is lifted.
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