He discovered that the orbits of planets are ellipses

A) Kepler B) Ptolemy C) Galileo D) Tycho Brahe E) Copernicus


A

Physics & Space Science

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How many orders are in the spectra formed by a grating with 3000. lines/cm illuminated by red light of wavelength 600. nm?

A) 1 B) 5 C) 0 D) 4 E) 3

Physics & Space Science

In stainless steel, nickel and chromium atoms form a _____________solid solution in iron.

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

Main sequence stars have radii ranging from about 0.03 solar radius to 30 solar radius

Indicate whether the statement is true or false

Physics & Space Science

Four unequal resistors are connected in a parallel with each other. Which one of the following statements is correct about this combination?

A) The equivalent resistance is less than that of the smallest resistor. B) The equivalent resistance is equal to the average of the four resistances. C) The equivalent resistance is midway between the largest and smallest resistance. D) The equivalent resistance is more than the largest resistance. E) None of the other choices is correct.

Physics & Space Science