Which of the following refrigerants is considered an HFC-type of refrigerant?

A. R-134a
B. R-12
C. R-22
D. R-11


Answer: A

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Well-managed companies set aside money to pay for emergencies that inevitably arise in the course of doing business. A commercial solid-waste recycling and disposal company in Mexico City puts 0.5% of its after-tax income into such an account. (a) How much will the company have after 7 years if after-tax income averages $15.2 million and inflation and market interest rates are 5% per year and 9% per year, respectively? (b) What will be the buying power of that amount in today’s dollars?

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The dry adiabatic lapse rate is equal to minus -°C/100 m

a. 0.5 b. 1 c. 1.5 d. 3 e. 3.5

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