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An ice chest is constructed of Styrofoam (k = 0.033 W/m?C) with inside dimensions of 25 by 40 by 100 cm. The wall thickness is 5.0 cm. The outside of the chest is exposed to air at 25 ?C with h = 10 W/m2?C. If the chest is completely filled with ice, calculate the time for ice to completely melt. State your assumptions. The heat of fusion for water is 330 kJ/kg.
If the maximum temperature in the cycle is not to exceed 2200 K, determine the thermal efficiency and the mean effective pressure.
Given that an activity's normal time and cost are 10 days and $400 and its crash time and cost are 5 days and $800, what is the activity's slope?
The total force Fa + Fb exerted on the shelter is in the direction parallel to the line L and it's magnitude is 400 lb. Graphically determine the magnitudes of Fa and Fb.
Two control rods are attached at A to lever AB. Using trigonometry and knowing that force in the right-hand rod is F2=20 lb, determine a.) the required force F1 in the left-hand rod if the resultant R of the forces exerted by the rods on the le..
Assuming this pressure creates a force of F = F 0sin( t / t0) on the bullet, determine the velocity of the bullet at any instant it is in the barrel. What is the bullet"s maximum velocity?
water is pump from a lake to a storage tank at 18m above at a rate of 70 L/s while consuming 20.4 kW of electric power. disregarding any frictional losses in the pipes and any change s in kinetic energy, determine (a) the overall efficiency of the..
If the chest is completely filled with ice, calculate the time for the ice to completely melt. State your assumptions. The enthalpy of fusion for water is 330 kJ/kg.
problem 1 the u-tube manometer shown below is open to the atmosphere and partiallynbspfilled with water so that the
Air exits from the nozzle at 800m/s. find the air exit temperature from the compressor.
Module FEA - FINITE ELEMENT ANALYSIS , Provide answers to all questions. Note that assignment part 2 carries 60% of the marks for the course.
Determine the power of the pump. The efficiency of the pump is 65%.
but they vary in number of outputs, interfacing, cascadability, current limiting, and drive capability. As always, examine the data sheets carefully before substituting these parts! What is a Capacitor?
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