The rings of ____________ were discovered when they occulted a star
Fill in the blank(s) with correct word
Uranus
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The internal activity of Mars is responsible for its ________.
A. 4,000-km long rift valley, Valles Marineris B. magnetic field C. lack of an atmosphere D. slow rotation
The upper mantle can be divided into two portions, the
A) asthenosphere (lower zone of the upper mantle) and part of the lithosphere (the top zone of the upper mantle). B) asthenosphere (top zone of the upper mantle) and the lithosphere (the lower upper mantle). C) Moho and the lithosphere. D) continental mantle and the oceanic mantle.
A 1 cm diameter thick shield is placed around a furnace. What diameter holes should be put in the shield so that 50% of the incident radiation on the hole passes through?
What will be an ideal response?
Uniform Electric Fields: A space probe approaches a planet, taking measurements as it goes. If it detects a potential difference of 6000 MV between the altitudes of 253,000 km and 276,000 km above the planet's surface, what is the approximate electric field strength produced by the planet at 264,500 km above the surface? Assume the electric field strength is approximately constant at these altitudes.
A. 261 N/C B. 0.261 N/C C. 561 N/C D. 493 ?N/C