Why do some people think that cogeneration is a useful strategy for dealing with energy generation? Explain
What will be an ideal response?
Cogeneration is used when there is a reason for producing industrial steam for
manufacturing processes. If fuel is being burnt to boil water, why not also generate
electricity? (This was not allowed by regulators, who gave utilities monopolies.)
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330 g of water at 55°C are poured into an 855 g aluminum container with an initial temperature of 10°C. The specific heat of aluminum is 900 J/(kg?K)
What is the final temperature of the system, assuming no heat is exchanged with the surroundings? A) 28°C B) 39°C C) 31°C D) 33°C E) 35°C
When Eratosthenes was using the well at Syene and the obelisk at Alexandria to study the Earth, what statistic was he trying to calculate?
The mass of an atomic nucleon is nearly
A) twice that of an electron. B) four times that of an electron. C) a thousand times that of an electron. D) two thousand times that of an electron.
Which of these bodies are most likely to break up over time?
A) Trojan asteroids B) jovian satellites C) Kuiper Belt bodies D) asteroids in the main belt E) comet nuclei