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A petroleum engineer estimates that the present production of 400,000 barrels of oil during this year from a group of 10 wells will decrease at the rate of 15% per year for years 2 through 10. Oil is estimated to be worth $25 per barrel. If the interest rate is 10% compounded annually, what is the equivalent present amount of the prospective future receipts from the wells?
consider a 210mw steam power plant that operates on a simple rankine cycle. steam enters the turbine at 10mpa and 500oc
a city power plant wishes to install a feed-water heater in its steam generation system. it is estimated that the
thecoaster cars are lifted up the initial hill which has a height of 85 feet and released at the top of the hill with a
A rotor is being designed for a wind turbine. The rotor will have a diameter of D = 70 m. A single airfoil will be used for the length of the blades. The airfoil has its minimum drag to lift ratio when the lift coefficient is 1.0. Two options are bei..
1. a discrete 120 v ac output module is to be used to control a 230 v dc solenoid valve. draw a diagram showing how
a steam power plant operates on a simple ideal rankine cycle between the pressure limits of 3mpa and 50kpa. the
finding the time interval for the motorcyclist to reach a given acceleration if the motorcyclist starts from rest
the moisture content at the turbine exhaust is not to exceed 15%. determine the greatest allowable steam pressure at the turbine inlet and calculate the cycle efficiency.
u.s. energy use was approximately 100 quads quadrillions btu in 2008. about 85 of this energy was supplied by burning
refrigerant 134a is compressed at a steady state from 2.4 bar 32 f to 12 bar 50 celsius. the power input to the
a piston-cylinder device contains 5 kg of refrigerant-134a at 0.7 mpa and 60 degrees c. the refrigerant is now cooled
the 680 kg load suspended from the helicopter is in equilibrium. the aerodynamic drag force on the load is horizonal.
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