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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?
Three stock car drivers are racing around a circular bend. They are each circling the bend at different radii: r(1)=249 m , r(2)=255 m , and r(3)=261 m . At a given instant, all three are traveling at the same transverse rate of rotation
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Four liters of water are equilibrated with a gas mixture containing carbon dioxide at a partial pressure of 0.3 atm. Henry's law constant for H2CO3* solubility is 2.0g/L-atm.
A circulatr concrete column with a diameter of 8" has spiral reinforcing. Find the capacity of the column with 1% reingforcement. Find the capacity of the column with 8% reinforcement.
A water pipeline system is made up of three links in parallel. In any given year, on average, 99 in 100 pumps do not fail. The conditions in the links are statistically independent of each other.
The refrigerator resembles a small ice chest and is claimed to cool nine canned drinks, 0.350-L each, from 25 to 3°C in 12 h
If the temperature of the flashlight increases to 120oF, does the spring force increase or decrease and by how much. Take the casing wall to have an outer diameter of 1.5 in., thickness 0.125in.,length L = 3 in., and elastic modulus of 300ksi.
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