The economic system known as mercantilism originated in which state?
a. England
b. France
c. Holland
d. Russia
b. France
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The mass of the Earth’s troposphere, the lower part of the atmosphere, is approximately 4.4 x 1018 kg.
a. Use the ideal gas law to estimate volume of the troposphere in cubic meters at standard state (P = 1 atm, T = 298 K, R = 0.0821 atm-L/mol-K ). Note, the average molecular weight of air is 28.967 grams/mole.
b. The average mass of water in the troposphere is 1.3 x 
Using your answer from above, calculate the concentration of water vapor in the troposphere in mg/
?
c. Using your answer from part b, what would be the concentration of water vapor in the troposphere in 
What will be an ideal response?
?
A. Valve lash increases as pushrods and rocker arms wear. B. ?Valve lash increases as the valve and seat wear. C. ?A decrease in lash can cause improper valve cooling and can lead to burned valves. D. ?All of the above
A reformer on board a fuel cell powered vehicle is used to produce hydrogen from a fuel sources such as methanol.
Answer the following statement true (T) or false (F)
Syringe pumps oftentimes fail because reagents adhere to the ceramic piston and deteriorate the seal. Trident Chemical developed an integrated polymer dynamic seal that provides a higher sealing force on the sealing lip, resulting in extended seal life. One of Trident’s customers expects to reduce down time by 30% as a result of the new seal design. If lost production would have cost the company $110,000 per year for each of the next 4 years, how much could the company afford to spend now on the new seals? Use a MARR of 12% per year.
What will be an ideal response?