The change in length of a material per degree divided by the original length is the linear coefficient of thermal _____________.
Fill in the blank(s) with the appropriate word(s).
expansion
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A(n) _____ is a model universe with Earth at the center, such as the Ptolemaic Universe
A) heliocentric universe B) eccentric universe C) geocentric universe D) concentric universe
On the main sequence on an H-R diagram, our Sun lies at about ________
Fill in the blank(s) with correct word
A pressure of 10.0 mm Hg is measured using a constant-volume gas thermometer at a temperature of 50.0°C. What is the pressure (in mm Hg) at the zero-point temperature?
A. 31.8 B. 11.8 C. 8.45 D. 54.6 E. 68.3
Consider three galaxies, Alpha, Beta and Gamma. An observer in Beta sees the other two galaxies each moving away from him in opposite directions at speed 0.70c. At what speed would an observer in Alpha see the galaxy Beta moving?
A) 0.82c B) 0.70c C) 0.94c D) 0.35c E) 0.57c