Mars is often called a "midway world," similar in some respects to Earth, and in others to our Moon. Explain

What will be an ideal response?


Like our Moon, much of Mars is ancient cratered terrain, and its density is closer to that of the Moon than Earth. But like us, Mars has seasonal variations, polar caps, clouds, an atmosphere, dust storms, and signs of past liquid water and erosion.

Physics & Space Science

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Which of the following is true of carbonaceous chondrites?

A) They contain materials left over from the formation of the Solar System. B) They do not contain any volatile compounds. C) They are a class of iron meteorites. D) They are a class of stony-iron meteorites.

Physics & Space Science

Phase Angles: A 50-? resistor is placed in series with a 40-mH inductor. At what frequency will the current in this circuit lag the applied voltage by exactly 45°?

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

A steel pipe column (E 5 210 GPa) with length L 5 4.25 m is constructed of circular tubing with outside diameter d2 5 90 mm and inner diameter d1 5 64 mm. The pipe column is fixed at the base and pinned at the top and may buckle in any direction. The Euler buckling load of the column is most nearly:

(A) 303 kN
(B) 560 kN
(C) 690 kN
(D) 720 kN

Physics & Space Science

A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5.0 cos (?t). The magnitude of the acceleration (in m/s2) of the body at t = 1.0 s is approximately

a. 3.5. b. 49. c. 14. d. 43. e. 4.3.

Physics & Space Science