How are most carbonate rocks formed?
What will be an ideal response?
biological activity
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In what range of masses are most stars found? What about the range in luminosity? How are they related?
What will be an ideal response?
The basic energy transformation that takes place in all heat engines is
A) chemical to thermal. B) kinetic to thermal. C) chemical to electric. D) non-thermal to thermal. E) thermal to non-thermal.
A good cook knows that the temperature of violently boiling water is
A) higher than that of simmering water. B) the same as that of simmering water. C) actually lower than 100°C. D) neither of the above
You want to have an electron in an energy level where its speed is no more than 66 m/s. What is the length of the smallest box (an infinite well) in which you can do this? (h = 6.626 × 10-34 J ? s, mel = 9.11 × 10-31 kg)
A) 5.5 µm B) 1.4 µm C) 11 µm D) 2.8 µm