Engineering, 29.01.2020 06:41 loredobrooke9929
it has been estimated that 139.2x10^6 m^2 of rainforest is destroyed each day. assume that the initial area of tropical rainforest is 20x10^12 m^2.
a) what is the exponential rate of rainforest destruction in units of 1/days?
b) if there were 24.5x10^12 m^2 of tropical rainforest on earth in 1975, how miuch tropical rainforect would be left on earth in 2015 if the exponential rate of destruction determined in part (a) stayed constant over this time interval?
c) if tropical rainforests remove 0.83 kg (c)/m^2-year from the atmosphere, how much less carbon [kg(c)] would be removed in 2025 compared to removed in 1975?
Answers: 2
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If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.
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Engineering, 04.07.2019 18:10, niyawilliams23
Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10
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Engineering, 04.07.2019 18:20, aly95
An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid
Answers: 3
it has been estimated that 139.2x10^6 m^2 of rainforest is destroyed each day. assume that the initi...
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