According to Shapley, globular clusters were more common toward constellation Aquarius
Indicate whether the statement is true or false
False
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What gas is the primary constituent of our atmosphere?
A) oxygen B) carbon dioxide C) nitrogen D) hydrogen E) helium
The atomic bomb that was dropped on Nagasaki in 1945 killed 140,000 people, helping to end World War II on the next day. It released energy equivalent to that of 20,000 tons of TNT explosive
How much mass was converted to energy when this took place? (1000 tons ? 4.3 × 1012 J) (Incidentally, modern H-bombs have energy yields 1000 times as much!)
An egg is placed at the bottom of a bowl filled with water. Salt is slowly added to the water until the egg rises and floats. From this experiment, we conclude that
A) egg-shell calcium is repelled by sodium chloride. B) the density of salt water exceeds the density of the egg. C) buoyant force is not always exerted upward. D) salt sinks to the bottom. E) none of the above
What is 34 + (3 ) × (1.2465 ) written with the correct number of significant figures?
A) 37.74 B) 37.7395 C) 38 D) 37.7 E) 4 × 101