An ideal gas is taken around the process shown. The net work done on the gas is most nearly:
4
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Earth is made mostly of metals and rocks. Where did most of the elements that make up these materials (carbon, silicon, iron, etc.) form?
A) They were produced by the Big Bang. B) They were produced by chemical reactions in interstellar gas clouds. C) They were produced by stars. D) They were produced in our Sun. E) They were produced by nuclear fission of uranium and other radioactive materials in space.
Calculate the current through a 10.0-m long 22 gauge (having radius 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. The resistivity of nichrome is 100 × 10-8 ? ? m
A) 17.5 A B) 30.9 A C) 61.8 A D) 388 mA E) 776 mA
What is a heat engine?
a. A machine that heats up as it does work. b. A machine that produces heat. c. A machine that destroys heat, cooling its surroundings. d. A machine that converts heat to work. e. A machine that transfers heat to surrounding cooler objects.
Discuss the nature of the Miller-Urey experiments. What are the results of these experiments?
What will be an ideal response?