Process of Science: Explain how observations of asteroids, comets, and meteorites test our theory for the formation of the solar system in unique ways that are not possible through observations of the planets
What will be an ideal response?
Asteroids, comets, and meteorites are the most primitive objects in the solar system and observations of them can tell us about the conditions of the solar nebula as planets began to form. Planets are so massive that they have undergone additional processes such as differentiation and geology that prevents us from measuring exactly when and from what they formed.
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During which of the following phases of life is a star's pressure and gravity out of equilibrium?
A) main sequence B) helium core fusion C) white dwarf D) red giant E) A star is never out of equilibrium.
A 100-W light bulb is in a socket supplied with 120 V. What is the current in the bulb?
a. 7200 A c. 1.4 A b. 0.83 A d. 0.50 A
What is the kinetic energy of an electron in the n = 2 Bohr orbit of the hydrogen atom?
A) 2.71 × 10-19 J B) 3.20 × 10-19 J C) 5.45 × 10-19 J D) 6.10 × 10-19 J E) 2.16 × 10-18 J
On the average, in a ferromagnetic domain permanent atomic magnetic moments are aligned ____ to one another
a. antiparallel b. parallel c. perpendicular d. alternately parallel and antiparallel e. randomly relative