An interstellar gas is emitting 10-centimeter wavelength radiation, and a nearby star is emitting 10-micrometer wavelength radiation. Which of these can you observe through an Earth-based telescope?
A. the star
B. the interstellar gas
C. both interstellar gas and the star
D. None of these choices are correct.
Answer: B
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A spherical hot air balloon of diameter 20. meters just floats (hovers) when the hot air inside has been heated to a density of 1.00 kg/m3
What is the weight of the balloon and cargo (not including the air inside) if the surrounding air has a density of 1.30 kg/m3?
For a particle in a finite box, which of the following is not true?
A. The energies are quantized for bound states. B. The bound-state wave functions at the walls do not have to be zero. C. The wave function can exist outside the walls. D. There is the same number of bound states in a finite box as in a box with infinite walls. E. None of these statements are true.
Latitude Lines Run
What will be an ideal response?