Describe some characteristics that the terrestrial planets have in common. Use the solar nebula theory to explain the commonality
What will be an ideal response?
Terrestrial planets are small, dense, rocky worlds with little or no atmosphere. The Terrestrial planets have densities like that of rock or metal. According to the solar nebula theory, in the inner regions of the solar system, close to the Sun, the only materials that could form grains were compounds with high melting points, such as metal oxides and pure metals, which are very dense. Mercury, Venus, Earth, and Mars are evidently composed of a mixture of metals, metal oxides, and silicates, with proportionately more metals close to the Sun and more silicates farther from the Sun.
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Absolute zero is the temperature
A. of the freezing point of water. B. on the coldest day recorded at Nome, Alaska. C. at which an ideal gas would exert zero pressure. D. of the freezing point of mercury. E. of the boiling point of liquid helium.
Saturn's cloud surface appears more uniform than Jupiter's because:
A) there is a thick outer cloud covering of water ice overlying the colorful ices. B) due to Saturn's lower gravity, the colorful cloud layers escaped. C) it is composed of completely different gases than Jupiter's. D) the cloud layers are thicker, allowing fewer holes to see the colorful layers. E) due to Saturn's greater distance from the Sun, the colorful cloud layers are just not visible.
When an LCR series circuit is in resonance, its impedance is:
a. a maximum. c. zero. b. equal to its resistance. d. p/2 W.
Magnetic field lines about a current-carrying wire
A) extend radially from the wire. B) circle the wire in closed loops. C) both of these D) neither of these