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The US energy consumption rate for 2011 is available in existing public data [bp.com/statisticalreview] "BP Statistical Review of World Energy." Assuming a 2% growth rate per year, find the doubling time [yrs] and estimate the energy consumption rate [MTOE] in the year 2050. Also, assuming that current US coal reserves supplied all the fuel energy for the US, estimate how long the coal would last [yrs].
A 4 m diameter sphere is embedded in insulation. The sphere contains a liquid-ice mixture maintained at 0 deg C. The ambient temperature surrounding the insulation is 25 deg C.
how to derive the constitutive expression for stress in a Newtonian fluid. How to derive Navier-stokes equation for compressible, incompressible, and invicid flows.
a first class lever in static equilibrium has a 50lb resistance force and a 15lb effort force. the levers effort force is located 4ft from the fulcrum. what is the actual mechanical advantage of the system?
A horizontal platform rests on four vertical springs, each of stiffness 15kN/m and mass 0.25kg. what will the frequency of oscillation of the table be if it has a mass of 2.okg
the motion of a particle is defined by the position vector r=a(cos t + t sin t)i + A(sin t-t cos t)j, where t is expressed in seconds. Determine the values of t for which the position vector and acceleration are.
Calculate the specific enthalpy at the compressor outlet. Include in your calculations the changes in kinetic and potential energy.
consider a magnet moving in a coil of n turns. this system can be modelled as mass spring damper system. the damping
Determine the surface temperature of the wire during a windy day when the air temperature is 10°C and the wind is blowing across the transmission line at 50 km/h.
a square 3m x 3m gate is located in the 45 sloping side of a dam. some measurements indicate that the resultant force
Determine the radius of the crank R and the speed n of a slider crank mechanism, used in a shaker table. It is required that the average speed of the table is 5 m/s, and the maximum absolute acceleration is 3000m/s^2. Assume ratio R/L=0.2
you are given a task of compressing a fixed quantity of gas from P1,T1 to P2,T1. you wish to do this using a polytropic process coupled with a constant pressure P2 heat-transfer process. determine the polytropic process that minimizes the entropy ..
one kilogram of air as an ideal gas executes a carnot power cycle having a thermal efficiency 50. the heat transfer to
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