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A heat pump is proposed that uses 50F ground water to heat a house to 70F. the groundwater experiences a temperature drop of 12F. If the house requires 75000BTU/hr, calculate the minimum mass flux of the groundwater and the minimum HP required for the pump.
air expands from 100kpa 40 degrees c with volume .75 m3 to 15kpa in a polytropic process with polytropic exponent n.
For this same component and alloy, compute the stress level at which fracture will occur for a critical internal crack length of 6.0mm.
a stress gauge located at c on the surface of the bone ab indicates that the average normal stress in the bone is 3.80
a steam power plant operates on a rankine cycle between pressure limits of 0.08 bar and 80 bar. the heat added by
a 0.5m3 rigid tank contains refirgerant r-134a initially at 200 kpa and 40 quality. heat is now transferred untill the
The temperature on the faces of a plane wall 15cm thick are 375 and 85?.The wall is constructed of a special glass with the following properties:k=0.78W/m·?,ρ=2700Kg/m³,Cp=0.84KJ/Kg·?.What is the heat flow through the wall at steady-state cond..
Discussion of various cycles attempted to meet the goal as well as the positive and negative aspects of your design.
answer the following questions1. name six types of springs.2. name three types of gears.3. state hookes law.4. give the
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.
a car with mass 3250 lbm is driven at 60 mih when the brakes are applied to quickly decrease its speed to 20 mih.
Calculate the average square distance between the particles and plot its ratio to the time step . This is the diffusion/dispersion coefficient.
a ball is dropped from a boat so that it strikes the surface of a lake with speed 16.5 fts. while in the water the
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