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(a)The annual energy use by all of humanity is about 400 QUADS – where 1 “quad” is 1 quadrillion (1 x 10^15) BTUs. There are at least 6 billion people living on earth now. If we take those two numbers above to be exact, what is the AVERAGE POWER use per person on the planet (expressed in kW)?
(b) The U.S. accounts for just about one-quarter of all of the energy used by people on earth, and has some 300 million people. What’s the average power usage of the average American?
Calculate the metric tons of gravel required to fill an excavated area 70 meters by 50 meters by 2 meters deep if the gravel has a density of 1890 kg/(m^3).
The inflow to a small reservoir during a storm may be described by the equations Q=1000(1-e^-kt) where Q= flow in cfs k= runoff rate = 1.0 per hour t = time in hours The outflow through the dam gates is held constant at 800 cfs.
i want to know how to draw bending moment diagram for this shape and the value of the moment in critical sections
The mass of each pulley of the system is 50 kg, and mass of the suspended object A is 160 kg. Determine the force necessary for the system to be in equilibrium? Be sure to draw complete free body diagram(s) for full credit.
Find an equation of a plane containing the three points (-2, 5, -3), (-7, 3, 1), (-7, 4, 3) in which the coefficient of x is -8.
Ethyl acetate is made from acetic acid and ethyl alcohol. Let x = pounds of acetic acid input, y=pounds of ethyl acohol input, and z = pounds of ethyl acetate output. The relationship of output to input is: z^2/(1.47x - z)(1.91y - z) = 3.9.
A Fe-.25 w/o Carbon alloy is sloly cooled to 700 degrees C. What is the composition of the Ferrite(alfa) phase and what is the compositon of the cementite(Fe3C) phase. Whate are the relative fractions of ferrite and cementite
A driver is travelling at 50 mi/h on a wet road. An object is spotted on the road 500 ft ahead and the driver is able to come to a complete stop just before hitting the object.
Person spining has his arms outward. The moment of inertia is 52kg*m^2 and ang. speed 3.80 revolutions/ second. if the persons arms are down. moment of inertia goes to 35kg*m^2. find the new angular speed
Assuming unit surface area, find the conductive heat loss through the furnace wall and the temperature at the interface of the fire clay and red brick.
How much extra water does a 21.5 ft, 175-lb concrete can one displace compared to an ultra-lightweight 38-lb Kevlar canoe of the same size carrying the same load
Engineers at the General Electric turbine division are trying to improve an existing adiabatic steam turbine that receives 100 kg/s superheated steam at 10 MPa and 800 oC and after expansion and producing power,
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