What type of communication is generally of a point-to-point nature?
A. Terrestrial
B. Microwave
C. Satellite
D. Voice-grade
B
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A large water utility is planning to upgrade its SCADA system for controlling well pumps, booster pumps, and disinfection equipment so that everything can be centrally controlled. Phase I will reduce labor and travel costs by $28,000 per year. Phase II will reduce costs by an additional $20,000 per year, that is, $48,000. Phase I savings should occur in years 0, 1, 2, and 3 and phase II savings should occur in years 4 through 10. Let i = 8% per year.
(a) Using a spreadsheet determine the present worth of the upgraded system for years 1 to 10. (b) The utility General Manager had hoped for a present worth of at least $400,000. Determine the interest rate at which this would be correct.
The Beer-Lambert law relates the absorbance A of a solution to the concentration C of a species in solution by A = MLC, where L is the path length and M is the molar absorption coefficient. Assume that C = 1.25 ± 0.03 
L = 1.2 ± 0.1 cm, and A = 1.30 ±0.05.
a. Estimate M and find the uncertainty in the estimate.
b. Which would provide a greater reduction in the uncertainty in M: reducing the uncertainty in C to 0.01 
reducing the uncertainty in L to 0.05 cm, or reducing the uncertainty in A to 0.01?
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What will be an ideal response?
____ is a branch of philosophy that considers how to apply concepts of right or wrong.
A. Science B. Technology C. Sustainability D. Ethics