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The concrete slab of a basement is 11 m long, 8 m wide, and 0.20m thick. during the winter, temperatures are nominally 17 C and 10 C at the top and bottom surfaces respectively. if the concrete has a thermal conductivity of 1.4 W/mK what is the rate of heat loss through the slab? if the basement is heated by a gas furnace operating at an efficiency of n=0.9 and natural gas is priced at C=$0.02/MJ, what is the daily cost of the heat loss?
consider a cylinder filled with an ideal gas and fitted with a piston. a on p-v coordinates sketch a process in which
Determine the coordinates x' and y' of the centroid C of the area shown in the figure and calculate the moments of inertia of the area shown, about ox and oy axes.
Determine the maximum speed at which the car with mass can pass over the top point A of the vertical curved road and still maintain contact with the road.
A vessel with a volume of 0.0011 m3 is filled with dry saturated steam at a pressure of 95 kPa. It is then sealed and cooled to 250C. Determine the amount of heat that must be removed.
Assuming a coefficient of static friction equal to 0.2 at the common surface, find the maximum torque that may be transmitted by the flywheel without slippage.
design of a vacuum distillation plant for purification of glycerin by-product from a biodiesel plant.
problem a 5x5 plate with a crack size of 2a1.5 is under a spectrum load as shown below. the plate has a yield strength
What is hogr? How much steam pressure is required to maintain adequate vacuum with it? Where are hogr used in general?
let it cool back to the outdoor temperature, pass it through a turbine, and discharge the cold air leaving the turbine into the house. from a thermodynamic point of view, is the proposed system sound?
a combined gas-vapor power plant operates as shown in fig.9.94. pressure and temperature data are given at principal
find (a) the power rating of the electric heater and (b) the temperature rise that the air experiences each time it passes through the heater.
a construction crew lifts approximately 560 lb of material several times during a day from a flatbed truck to a 32 ft
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