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A 50-kg iron block and a 20-kg copper block, both initially at 80oC, are dropped into a large lake at 15oC. Thermal equilibrium is established after a while as a result of heat transfer between the blocks and the lake waater. Determine the total entropy change for this process.
two barges each with a displacement mass of 550 mg are loosely moored in calm water. a stunt driver starts his 1510-kg
The heating is to be done in a mixing tank by direct injection of the steam, all of which condenses. Determine the two inlet mass flows needed to meet the desired hot water flow rate.
Assume they test null hypothesis H0: versus H1: Will the engineers decide to use the steel if H0 is rejected? Will the engineers decide to use the steel if H0 is not rejected?
determine the critical load on a steel column having a square cross section 12 mm on a side with a length of 300 mm.
1 consider the diagram below where a pump is used to draw water from a lake to feed an irrigation system.a which of the
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?
an electrically driven pump operating at steady state is used to draw water from a pond. at the pump inlet the pressure
a.calculate the enthalpy entropy and gibbs free energy changes when 10g of supercooled liquid silver solidifies
determine the temperatures of surface 1 through 4 of the furnace cavity of example 13.3 if the entire furnace
a 60 mm bore 02 series double row angular contact ball bearing has a 15 degrees contact angle. the outer ring rotates
a what is the approximate ductility el of a brass alloy that has a yield strength of 275 mpa? what is the tensile
brass balls each of mass 0.258 kg and initially at 130degc are quenched in a water bath at 50degc for 2 minutes at a
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