Give an example of a material whose useful property depends upon a metastable state
What will be an ideal response?
phosphorescent materials
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Which of the following is always true about images captured with x-ray telescopes?
A) They are always shown with colors that are not the true colors of the objects that were photographed. B) They always are made with adaptive optics. C) They show us light with extremely long wavelengths compared to the wavelengths of visible light. D) They always have high angular resolution. E) They are always pretty.
A planet has two small satellites in circular orbits around the planet. The first satellite has a period 18.0 hours and an orbital radius 2.00 × 107 m. The second planet has an orbital radius 3.00 × 107 m
What is the period of the second satellite? A) 60.8 h B) 12.0 h C) 33.1 h D) 9.80 h E) 27.0 h
What causes granulation on the photosphere?
a. bursts of energy b. magnetic fields c. solar cycle d. differential rotation e. convection
Overall, Jupiter's composition is most like that of
A) Earth. B) a comet. C) an asteroid. D) the Sun.