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An industrial plant consumes 500 kW at a lagging power factor of 0.6.
(a) Find the required kVA rating of a synchronous capacitor to improve the power factor to 0.9.
(b) If a 500-hp, 90% efficient synchronous motor, operating at full load and 0.8 leading power factor, is added instead of the capacitor in part (a), calculate the resulting power factor.
Consider the following information: i. The layer of dead skin on our bodies is sufficient to protect us from most -particle radiation.
One type of commercial smoke detector contains a minute amount of radioactive americium-241 (241Am), which decays by -particle production.
Determine the length of service life necessary if the equipment
Make a list of the risks to society from the use of each type of power plant. With this knowledge, which type of radioactive decay has the net effect of changing a neutron into a proton? Which type of decay has the net effect of turning a proton i..
Using the concepts of material balances, determine how much (in moles and lbs) air is needed and CO2, N2, CO, and H2O are emitted for every gallon of gasoline burned in your car's engine.
Use the information in the above table to compute the Control Limits for an Average and a Range Control Chart.
What tower diameter should be used for optimum conditions of minimum total cost per year?
The following four solvents, with accompanying distribution coefficients in mass-fraction units, are being considered. Water and each solvent (C) can be considered immiscible. For each solvent, estimate the kilograms required per hour if a single ..
The heat of formation of (NH4)2SO3 (aq) at 25°C is -890.0kJ/mol, and that of NH4HSO3 (aq) is -760 kJ/mol. The heat capacities of all liquid solutions may be taken to be 4.0 J/(g*°C) and that of the flue gas may be that of nitrogen. Evaporation of ..
Temperature variations are small over the shaft cross section. Evaluate the temperature and conduction heat rate at the shaft-pipeline joint (x = 0) and at the shaft-ground interface (x = 1 m)
Derive an expression similar to Eq. (56) for finding the optimum exit temperature of cooling water from a heat exchanger when the temperature of the material being cooled is not constant.
A vapour stream that is 65 mole% styrene and 35 mole% toluene is in equilibrium with a liquid mixture of the same two species. The pressure in the system is 20 kPa. Use Raoult's law to estimate the composition of the liquid and the system temperat..
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