Approximately how long did the era of nucleosynthesis last?
A) 10-10 second
B) 0.001 second
C) 5 seconds
D) 5 minutes
E) 5 years
D
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All Superfund sites must be cleaned to the same standard
What will be an ideal response?
In what way does a 20 meter telescope outperform a 5 meter telescope?
A) The 20 meter can observe light with a wavelength 4 times longer than that of the 5 meter. B) The images of the 20 meter are 4 times brighter than those of a 5 meter. C) The images of the 20 meter are 1/8th as larger as those of the 5 meter. D) All objects observed by the 20 meter telescope will appear larger than those of the 5 meter. E) The images of the 20 meter are 16 times brighter than those of a 5 meter.
A baseball is hit at ground level. The ball is observed to reach its maximum height above ground level 3.0 s after being hit. And 2.5 s after reaching this maximum height, the ball is observed to barely clear a fence that is 97.5 m from where it was hit. How high is the fence?
a. 8.2 m b. 15.8 m c. 13.5 m d. 11.0 m e. 4.9 m
We can measure the radii of stars in an eclipsing binary system, in addition to the masses
Indicate whether the statement is true or false