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The economically destructive price spike of 2007-2008 occurred when spare production capacity fell below 1 mbpd, causing a run-up in oil price from $50 to $145 per barrel. An issue for world oil spare capacity is the internal consumption of OPEC producers. OPEC production has ranged between 30 and 33 mbpd since 2004. Internal use is currently about 25% of total OPEC production, but it is growing by 2% per year. The internal consumption growth is largely for nonelastic end uses such as electricity generation, water treatment, and new buildings. If the current world spare capacity is 2 mbpd and the OPEC total production does not increase beyond 33 mbpd, how many years will it take for the spare capacity to fall below 1 mbpd again?
Consider a beam of protons bombarding a sample of sulfur. One possible nuclear reaction is 34-S(p, alpha)31-P. (a) What is the Q-value for this reaction? (b) What is the minimum energy that a proton must have in order for the reaction to occur?
The figure shows an idealized structure consisting of one or more rigid bars with pinned connections and linearly elastic springs.
a rigid tank is divided into two equal parts by a partition. one part of the tank contains 5.2kg of compressed liquid
A round cantilever bar is loaded. Given diameter d = 50mm, T = 0.1P N.m, F = 10P N. Allowable stresses are 100 MPa in tension and 60 MPa in shear on a section at a = 120 mm from the free end. Determine largest P.
Consider an elastomer matrix composite reinforced with steel cord (1 mm length and 0.5 mm diameter). What is the minimum fracture stress for the steel cord, if the interfacial shear strength is 20 MPa?
Determining the largest couple that can be applied to a beam in pure bending. A beam of cross section shown is extruded from an aluminum alloy for which σy = 310 MPa and σu = 480 MPa.
1 a piston-cylinder device contains 5 kg of r134a at 800 kpa and 60 c. the refrigerant is now cooled at constant
A steel rod of radius 0.01 m and length 2. M is pulled on with a tensile force of 200,000 N, and the bar stretches to a length of 2.08 m. The radius of the bar is reduced to 0.0099 m. Determine the stress, strain, Young's modulus (E), and Poisson's r..
An IFR turbine is required with a power output of 300 kW driven by a supply of gas at a stagnation pressure of 222 kPa, at a stagnation temperature of 1100 K, and at a flow rate of 1.5 kg/s.
an open feedwater heater operates at steady state with liquid water entering at inlet 1 at 50 degrees celsius and 1
a 0.75m3 tank contains nitrogen at 150kpa and 40degc. 2.0 kg of oxygen are added to the tank. what is the final
on a cloudless day the sunlight that reaches the surface of the earth has an intensity of about 1.2 103 wm2. what is
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