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In 2011, the United Nations announced that the human population reached 7 billion and was increasing at approximately 1.5%. Estimate the doubling time of the human population and then estimate the available land area on Earth per person at the end of the first and the third doubling times. The Earth is approximately two-thirds water and can be approximated as a sphere of 8000 mi in diameter. Then, discuss the implications for these estimates.
a temperature measurement device with a time constant of 0.15 seconds outputs a voltage that is linearly proportional
1. water at 80degf flows from a storage tank through 550 feet of 6-inch nominal size cast iron pipe actual id 6.52
the inlet section of a vacuum cleaner is a rectangle 1 in by 5 in. the blower is able to provide suction at 25 cubic
a rigid 2-ft3 vessel contains water originally at 150of and 5.07 percent quality. the water is then heated until its
A cylindrical aluminium rod 0.02 m in diameter and 1 m length is taken out of an oven at 150oC and cooled in a 3 m/s cross flow of air at 23oC. Calculate the average convective heat transfer coefficient. Use a correlation that uses properties at film..
Determine the additional force and moment reactions at the base O caused by the addition of the three 100-lb traffic signals B, C, and D. Report your answers as a force magnitude and a moment magnitude.
What is the net rate of radiation exchange between the spheres - What is the net rate of radiation exchange between the surfaces if they are diffuse and gray.
in the ice cream con, L=4in , and Theta = 35 degree, the cone is filled with ice cream such that the portion above the cone is a hemisphere. determine the volume of the ice cream? (usin Matlab program )
calculate the diameter of a medium carbon steel pin in double shear subjected to a suddenly applied shearing force of
a mass of 3 kilograms of steam at 2 mpa and 250degc are contained in a rigid tank. how much heat must be removed from
what is a beach profile that will provide protection to the infrastructure fronting a beach is it a wide well profiled
Use the thin-airfoil theory to find the center of pressure (as a function of lift coefficient) and the moment coefficient about the aerodynamic center for the NACA 2412 and the NACA 4412?
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