A thermodynamic engine has an efficiency of 31.4% and receives 8.72 kJ of energy per cycle. (a) How much work does it perform in each cycle? (b) How much energy does it exhaust in each cycle?
What will be an ideal response?
(a) 2.74 Kj (b) 5.98 kJ
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Mario Molina and Sherwood Rowland received the 1995 Nobel Prize for
A) their efforts to control chemical warfare. B) their efforts to control nuclear weapons. C) their experiments and theories concerning the chemical basis for atmospheric ozone depletion. D) their discovery of new ways to make the electronic portion of the electromagnetic spectrum more useable by all the people of the world. E) their experiments and theories concerning the chemical basis for global warming.
According to Planck's hypothesis, the energy of an oscillator is directly proportional to its ______________
Fill in the blank(s) with correct word
Consider two copper wires. One has twice the length and twice the cross-sectional area of the other. How do the resistances of these two wires compare?
A) Both wires have the same resistance. B) The longer wire has twice the resistance of the shorter wire. C) The longer wire has four times the resistance of the shorter wire. D) The shorter wire has four times the resistance of the longer wire. E) The shorter wire has twice the resistance of the longer wire.
Which one of the following volumes is largest?
A) 500. cm3 B) liter C) quart D) cc E) cubic inch