Determine the heat transfer per foot of length through a copper tube having an outside diameter of 2 inches and an inside diameter of 1.5 inches. The pipe contains 180ºF ammonia and is surrounded by 80ºF air.
What will be an ideal response?
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The luminosity of light emerging from the star's gaseous surface is equal to the
A) rate of energy generated from nuclear reactions in the star's core. B) mass of the star. C) star's apparent brightness. D) star's lifetime. E) temperature of the star's core.
The graph represents the velocity of a car over time. Where the car ends up, relative to its starting point, can be found by
A. adding the slopes of each section of the graph.
B. adding area 1 to area 2.
C. subtracting area 2 from area 1.
D. subtracting area 1 from area 2.
If you shine a flashlight "horizontally" from one wall to an opposite wall inside an accelerating spaceship in deep space, you will see the light traveling
A) in a straight-line path. B) in a parabolic path. C) along the arc of a circle.
Capella is the same temperature as our Sun, but about ten times the Sun's diameter; it must be about ________ times as luminous as our star
Fill in the blank(s) with correct word