Process of Science: Our theory of solar system formation suggests that larger planets cool more slowly than small ones
What does this suggest regarding geologic activity on Venus? Do we expect Venus to be geologically active? How did scientists test this hypothesis?
Since Venus is about Earth's size, we expect it to still have a hot interior and be active like Earth is. Radar observations of the Venusian surface showed evidence of tectonic activity and volcanoes.
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A rocket of length 80 m sits on a launch pad. The center of mass of the rocket is located 32 m above the ground. The rocket is launched to an altitude of 100 km. Where is the location of the center of mass of the total rocket-fuel system at the altitude of 100 km?
A. at ground level B. 32 m above ground level C. 40 m above ground level D. 80 m above ground level E. 50 km above ground level
What happens to the parallax as a star gets farther away?
A: Nothing. B: The parallax increases as the distance increases. C: The parallax decreases as the distance increases. D: The parallax decreases and the distance decreases. E: None of the above.
A nonuniform linear charge distribution given by ?(x) = bx, where b is a constant, is distributed along the x axis from x = 0 to x = +L. If b = 40 nC/m2 and L = 0.20 m, what is the electric potential (relative to a potential of zero at infinity) at the point y = 2L on the y axis?
a. 19 V b. 17 V c. 21 V d. 23 V e. 14 V
Suppose you live at latitude 20°S. Based on the given right ascensions and declinations, which of the following stars passes closest to your zenith on its daily path through your sky?
A) Sirius: RA = 6hr 45m, dec = -16°42' B) Canopus: RA = 6hr 24m, dec = -52°41' C) Alpha Centauri: RA = 14hr 40m, dec = -60°50' D) Arcturus: RA = 14hr 16m, dec = +19°11' E) Vega: RA = 18hr 37m, dec = +38°47'