Which simplest alcohol is used in race cars as fuel?
a. 2-Propanol
b. Ethylene glycol
c. Ethanol
d. Methanol
d
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An electroscope is charged by induction using a glass rod that has been made positive by rubbing it with silk. The electroscope leaves:
A) gain electrons B) gain protons C) lose electrons D) lose protons E) gain an equal number of protons and electrons
Which of the following is NOT a kind of geological feature found on the Moon?
A. rille B. scarp C. crater D. maria
Bohr's model of the structure of an atom includes ideas from both classical and quantum physics
Indicate whether the statement is true or false
A coal-fired plant generates 600 MW of electric power. The plant uses 4.8 × 106 kg of coal each day. The heat produced by the combustion of coal is 3.3 × 107 J/kg
The steam that drives the turbines is at a temperature of 300°C, and the exhaust water is at 37°C. (a) What is the overall efficiency of the plant for generating electric power? (b) What is the maximum efficiency that this plant could possibly have using the same temperature extremes that it presently uses? (c) How much thermal energy is exhausted each day by this plant?