He developed a system for predicting planetary positions that remained in use for some 1,500 years.
What will be an ideal response?
Ptolemy
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____ are small dark nebulae about 1 light-year in diameter that contain 10 to 1,000 solar masses
a. HI regions b. HII regions c. Emission nebulae d. Bok globules e. Reflection nebulae
When the handle of a tuning fork is held solidly against a table, the sound becomes louder and the time that the fork keeps vibrating
A) becomes longer. B) becomes shorter. C) remains the same.
A certain spherical asteroid has a mass of 3.5 × 1016 kg and a radius of 8.8 km. What is the minimum speed needed to escape from the surface of this asteroid? (G = 6.67 × 10-11 N • m2/kg2)
A) 23 m/s B) 16 m/s C) 520 m/s D) 730 m/s
The concept of uniformitarianism was developed by ______________, the "father of geology."
Fill in the blank(s) with correct word