You are asked to select a material for a barge tow line that must be as strong as steel cable, but can float on water and is not corroded by salt water. What material discussed in this chapter might be suitable?
What will be an ideal response?
OUHMWPE
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Helium fusion does not begin until the star has entered the giant region of the H-R diagram
a. True b. False Indicate whether the statement is true or false
Satellite Motion: The reason an astronaut in an earth satellite feels weightless is that
A. the astronaut is beyond the range of the earth's gravity. B. the astronaut is falling. C. the astronaut is at a point in space where the effects of the moon's gravity and the earth's gravity cancel. D. this is a psychological effect associated with rapid motion. E. the astronaut's acceleration is zero.
An expandable container holds 2.30 mole of He gas with an initial pressure of 770 kPa and an initial volume of 2.10 L. The gas expands isothermally to a final pressure of 350 kPa. How much heat is gained by the gas in this process?
A) 1280 J B) 792 J C) 685 J D) 1370 J E) 1700 J
As sediment travels in a downstream river, it changes by getting
A) coarser. B) finer. C) more poorly sorted. D) more angular.