Rank the following media in order according to the speed of light in them, from slowest to fastest: vacuum, air, water and glass
a. air, water, glass, vacuum
b. glass, air, water, vacuum
c. water, glass, air, vacuum
d. glass, water, air, vacuum
e. none of the above
d
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A series of tests in which water was heated while flowing through a 1 m-long electrically heated tube of 1.3 cm ID yielded the experimental pressure-drop data shown next.
GIVEN
Water flowing through a tube
Isothermal and nonisothermal pressure drop data given above
The dimensionless friction factor
Reynolds number
Inside tube diameter
Tube length
FIND
Dimensionless equation of the form:
SKETCH
PROPERTIES AND CONSTANTS
From Appendix 2, Table 13, for water
Which of the following best describes the geological histories of the Moon and Mercury?
A) Early in their histories, they suffered many impacts and experienced some volcanism and tectonics, but they now have little geological activity at all. B) Impact cratering is the only major geological process that has affected their surfaces. C) All four geological processes were important in their early histories, but only tectonics still reshapes their surfaces today. D) Impact cratering shaped these worlds early in their histories. Then, during the past few million years, they were reshaped by episodes of volcanism and tectonics.
Fast-moving electrons, moving close to c, in a strong magnetic field generate ________ radiation
Fill in the blank(s) with correct word
At a restaurant you are served coffee before you are ready to drink it. In order that the coffee be the hottest when you are ready for it, when would it be best to add cream (at room temperature) to it?
a. when you are ready to drink it b. right when you are served the coffee c. it doesn't matter, as the final temperature will be the same