A spaceship is traveling to the moon. At what point is it beyond the pull of Earth's gravity?
A) when it is closer to the moon than it is to Earth
B) when it gets above the atmosphere
C) when it is half-way there
D) when it is three-fourths of the way there
E) It is never beyond the pull of Earth's gravity.
E
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A steam line is insulated with 15 cm of rock wool. The steam line is a 5 cm OD iron pipe with a 5 mm thick wall. Estimate the heat loss through the pipe per meter length if steam at 120ºC is in the line and the surrounding temperature is 20ºC. Also determine the temperature distribution through the pipe and insulation.
What will be an ideal response?
A 50-kg bucket of concrete is suspended from a steel wire that is 1.0 mm in diameter 1.0 mm and 11.2 m long. What distance will the wire stretch? Young's modulus for steel is 2.0 x 1011 Pa
What will be an ideal response?
Clouds that appear dark in visible light often glow when observed at long infrared wavelengths
Indicate whether the statement is true or false
Remanent magnetism is present in rocks that contain the mineral named
a. magnetite. b. quartz. c. hematite. d. calcite.