An amount of a monatomic ideal gas is taken around the process shown. The amount of heat extracted during process B-C is:
1.10 J
2.20 J
3.15 J
4.45 J
5.60 J
6.none of the above
7.cannot be determined
4
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During the month of June the north celestial pole points towards Polaris, but during the month of December it points
a. just north of Polaris. b. just south of Polaris. c. towards the star Vega. d. towards the star Thuban. e. still towards Polaris.
The relative density of dust to gas is least in which place?
A) the interstellar medium B) dark nebulae C) the atmosphere of Earth D) molecular clouds E) reflection nebulae
Tiny grains of zirconium silicate (zircons) found embedded in sedimentary rocks have been radiometrically dated to what age?
A) 4.57 billion years ago B) 3.85 billion years ago C) 4.38 billion years ago D) 4.02 billion years ago
What accounts for the additional few minutes of sunlight we experience daily, before sunrise and after sunset?
What will be an ideal response?