Which of the following show evidence of ancient river beds?

A) the Moon
B) Mercury
C) Venus
D) Mars
E) all of the above


D

Physics & Space Science

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Winds on Mars give rise to planet-wide dust storms

Indicate whether the statement is true or false

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A cylindrical tank is assembled by welding steel sections in a heli-cal pattern with angle ? 5 50°. Tank diameter is 1.6 m, thickness is 20 mm, and internal pressure is 2.75 MPa. Modulus E 5 210 GPa and Poisson’s ratio ? 5 0.28. The normal stress acting perpendicular to the weld is approximately:


(A) 39 MPa
(B) 48 MPa
(C) 78 MPa
(D) 84 MPa

Physics & Space Science

Thrust a magnet into a coil of wire and you'll induce

A) voltage. B) current. C) both of these D) none of the above

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Within Earth's atmosphere the ozone layer is located:

A) in the troposphere. B) between the troposphere and the stratosphere. C) in the stratosphere. D) between the stratosphere and the mesosphere. E) in the mesosphere.

Physics & Space Science