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A Carnot heat pump is to be used for heating house in winter. The house temperature is set at 25oC. One day the outdoor temperature is 2oC. The house is estimated to lose heat at a rate 55000kJ/h. 1) Determine the total electrical work the heat pump can consume on that day; 2) If the heat pump consumes 6.6kW of power while operating, how long the heat pump ran on that day? 3) If the average price for electricity is 8.5 cent per kWh, what is the total cost?
A simple plate capacitor can store 6.5x10^-5 C at a potential of 10000 V. what dielectric constant must the material between the plates have if their area is 6.0x10^-5 m2 and they are 0.16 mm apart?
a large tower is to be supported by a series of steel wires.it is estimated that the load on each wire will be 11100N. determine the minimum required wire diameter assuming a factor of safety of 2 and a yield strength of 1030MPa.
The temperature of the water drops to 260 F as a result of heat transfer to the surroundings. Determine the final pressure in the tank?
The unit cell for uranium has orthorhombic symmetry with a, b and c lattice parameters of 0.286, 0.587, 0.495 nm, respectively. If its density, atomic weight, and atomic radius are 19.05 g/cm3, 238.03 g/mol, and 0.1385 nm, respectively, compute th..
2103 v 40 v b c qv e0pr2d r qdvpe012 r 4.24 m 42 a parallel-plate air-gap capacitor has a capacitance of 0.14 f.
A plane can fly 305 mph in still air. If it can fly 185 miles downwind in the same amount of time it can fly 120 miles upwind, find the velocity of the wind.
explain the factor, which inhibit the use of a very high resolution and a large number of colors for display in the case of raster scanning display devices.
Find the desired radius and mass of the absorber if the absorber is to not exceed an angular deflection amplitude of 30 degrees when the engine is running at 750 rpm.
consider a hot-air balloon which is comprised of a basket miscellaneous ropes a burner a fuel tank and of course the
For this same component and alloy, compute the stress level at which fracture will occur for a critical internal crack length of 6.0mm.
as shown in the ?gure a bar is supported by two springs and a damper. the bars left end is free to move vertically and
What kind of metals are often recommended for use at low temperatures, particularly when any sudden loading of the part is expected?
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