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Did nicolaus Copernicus work with another scientist?
His most important work, On the Revolution of Heavenly Spheres , was written entirely by him. He used other's astronomical observations, but wrote the book on his own.A fellow mathematician, Georg Rheticus, was very helpful in convincing Copernicus to publish his work.
How can 1000000000 be written as a product of two factors neither of them containing zeros?
1953125*512=1000000000
When written as a word or words what is the smallest positive whole number containing letterA?
It is one quadrillion. A hundred is usually disallowed.
How did the early astronomer Copernicus study the stars?
Other people recorded their observations of the stars and planets with astrolabes. Ptolemy came up with a (very complicated) mathematical system that would predict the location of planets over time. His basic, geocentric idea was modified over the centuries, but only became more complicated as observations became more exact. Copernicus took these observations that others had written down, and proposed a heliocentric system that he (correctly) noted was far simpler in making accurate predictions.
What is the abstract noun for test?
The noun test may be concrete or abstract, depending on whether it is a physical or mental test. The written document "test" is concrete.There is no separate adjective, other than perhaps "testing," to describe the quality of a test. There is, however, an adjective testable (able to be tested), with the abstract noun testability.
