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1.Given: In 1975 the population of a country was 12 million people. In 2000 the population of the same country was 16.4 million people. Over the 25-year period the country had a birth rate of 30 per thousand per year, and a net migration rate of zero. Assume that population followed the exponential function. Find. Estimate the death rate in the country in deaths per thousand per year
2.A rectangular block of aluminum 30 mm × 60 mm × 90 mm is placed in a pressure chamber and subjected to a pressure of 100 MPa. If the modulus of elasticity is 70 GPa and Poisson’s ratio is 0.333, what will be the decrease in the longest side of the block, assuming that the material remains within the linear elastic region? What will be the decrease in the volume of the block?
In 1908, H. Chick reported an experiment in which he disinfected anthrax spores with a 5% solution of phenol. The results of his experiment are tabulated below. Assuming the experiment was conducted in a completely-mixed batch reactor, determine the ..
Two parallel disks of diameter D are brought together, each with a normal speed of V. when their spacing is h, what is the radial component of convective acceleration at the section just inside the edge of the disk (section A) in terms of D, V, and h..
Calculate the number-average molecular weight of a random nitrile rubber [poly(acrylonitrile- butadiene) copolymer] in which the fraction of butadiene repeat unit is 0.30
An oedometer test on a clay soil gave the following results: Cc = 0.4, Ce = 0.08, OCR = 5. The thickness of the clay layer in the field is 2.6 m. The existing vertical effective stress at the mid-depth of the clay layer is 150 kPa. This vertical effe..
WATER FLOWS IN A PIPE AT 3 m/s A valve at the end of the pipe is suddenly closed. determine the pressure rise in the pipe.
The longitude of Albany, New York, is +73 degrees 44' 49" and the longitude of Los Angeles, California, is +118 degrees 10' 44". When the local mean time at Los Angeles is 10h 41m 00s a.m., the local mean time at Albany is
if point D is at (100,100) and the line DE to "E" is 300 feet long at an azimuth of 225 degree , what is location of point E in the XY coordinate system. what is the length and azimuth of the line connection points (100,100) to (300,500)
The 180-lb iron worker is secured by a fall-arrest system consisting of a harness and lanyard AB, which is fixed to the beam. If the lanyard has a slack of 4 ft, determine the average impulsive force developed in the lanyard if he happens to fall 4 f..
What is the difference in the density and specific weight of air if pressure increases from 1 to 50 atmospheres if temperature is kept at 4 degrees Celsius
Calculate uniform load (in addition to self wt.) which will cause the section to begin cracking
One second later another ball is thrown vertically from the ground with a velocity of 10m/s. Determine the height from the ground where the two balls pass eachother.
State the basic difference between the general method of slices and the bishop method of slices. b.)State the basic difference between the bishop and fellenius method of slices
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