Why do astronomers believe that Triton is a captured moon?
A) Triton is very small and potato-shaped, which is common of captured moons.
B) Triton is too large to have been formed in the "miniature solar nebula" thought to have surrounded Neptune in its very early history.
C) Triton appears to be made mostly of ice.
D) Triton orbits Neptune in a direction opposite that of Neptune's rotation.
D
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At high noon, the Sun delivers 990 W to each square meter of a blacktop road. What is the equilibrium temperature of the hot asphalt, assuming its emissivity e = 1? (? = 5.67 × 10^?8 W/m2/K4)
a. 364°C b. 637°C c. 90.5°C d. 181°C e. 136°C
An pipe of length L that is open at both ends is resonating at its fundamental frequency. Which statement about the sound is correct?
A) The wavelength is 2L and there is a displacement node at the pipe's midpoint. B) The wavelength is 2L and there is a displacement antinode at the pipe's midpoint. C) The wavelength is L and there is a displacement node at the pipe's midpoint. D) The wavelength is L and there is a displacement antinode at the pipe's midpoint.
The flattest of the elliptical galaxies are class
A) E0. B) SBO. C) E7. D) E9. E) SBF.
If the acceleration of an object is zero, then that object cannot be moving
A) True B) False