The dust in the interstellar medium can make distant stars look redder than they really are
Indicate whether the statement is true or false
T
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Ideal metals form close-packed crystal structures because the positive ______________cores pack like spherical billiard balls.
Fill in the blank(s) with the appropriate word(s).
A brass cube, 13.0 cm on a side, is raised in temperature by 239°C. The coefficient of volume expansion of brass is 57 × 10^?6/C°. By what percentage is any one of the 13.0-cm edges increased in length?
a. 0.34% b. 5.9% c. 0.45% d. 1.8% e. 4.3%
Name four properties of Mars that are similar to those of Earth today.
a. Magnetic field; average density; atmospheric chemical composition; active water erosion of the surface. b. Differentiated body; location in the Solar System; has weather and seasons; surface temperatures can be Earthlike. c. Differentiated body; location in the Solar System; atmospheric chemical composition; active water erosion of surface. d. Magnetic field; average density; has weather and seasons; surface temperatures can be Earthlike.
When the Moon is totally eclipsed, the Moon is illuminated by some sunlight reflected by Earth's atmosphere
a. True b. False Indicate whether the statement is true or false