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The unit is operated 120 days each year for 8 hours per day (960 hours per year), and the electric energy cost is $0.10 per kilowatt-hour. What is its annual cost of operation in terms of electric energy? First, we convert tons of cooling to BTU/h: (4 tons) × (12,000 (BTU/h)/ton) = 48,000 BTU/h. The annual cost of the electric energy is:
The flammable range of ammonia in dry air is 15.15–27.35% and in 100% relative humidity air is 15.95–26.55%. [ 42 ] [ clarification needed ] For studying the kinetics of ammonia combustion, knowledge of a detailed reliable reaction mechanism is required, but this has been challenging to obtain.
The total listenership for terrestrial radio in the United States as of January 2017 was 256 million, [8] up from 230 million in 2005. [9] Of the 121 million listeners in markets served by portable people meters in 2021, an average of 7.5 million are listening to a radio at any given time, up slightly from 2020.
In September 2016, Orbital ATK unveiled its AARGM-ER, which incorporates a redesigned control section and 11.5 in diameter (290 mm) rocket motor for twice the range and internal carriage on the Lockheed Martin F-35A and F-35C Lightning II, with integration on P-8 Poseidon, F-16 Fighting Falcon, and Eurofighter Typhoon planned afterwards; [48 ...
It was also expensive to buy and operate, with a flyaway cost of $2 million in FY1965 ($19.3 million today), and operational costs over $900 per hour ($9,000 per hour today). [ 13 ] After a broad review of its tactical force structure, the USAF decided to adopt a low-cost aircraft to supplement the F-4 and F-111.
The usual English proper name for Earth's natural satellite is simply Moon, with a capital M. [19] [20] The noun moon is derived from Old English mōna, which (like all its Germanic cognates) stems from Proto-Germanic *mēnōn, [21] which in turn comes from Proto-Indo-European *mēnsis 'month' [22] (from earlier *mēnōt, genitive *mēneses) which may be related to the verb 'measure' (of time).
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