What discoveries or further ideas were most critical for Copernicus' hypothesis that the planets orbit the sun to be promoted to a theory?
A) observation of Venus' phases
B) observation of sunspots
C) observation of the moons of Jupiter
D) A and B
E) A and C
E
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As a system loses its ability to do useful work
A) energy increases. B) entropy decreases. C) energy decreases. D) entropy increases. E) entropy remains constant.
Standing waves of frequency 57 Hz are produced on a string that has mass per unit length 0.0160 kg/m. With what tension must the string be stretched between two supports if adjacent nodes in the standing wave are to be 0.71 meters apart?
What will be an ideal response?
Ideal Gas Law: A 5.3 L flask of ideal neon gas (which is monatomic) is at a pressure of 6.0 atm and a temperature of 290 K. The atomic mass of neon is 20.2 g/mol. What is the mass of the neon gas in the flask. (R = 8.31 J/mol ? K, 1 atm = 101 kPa, NA = 6.022 × 1023 molecules/mol)
A. 2.7 × 10-2 B. 1.6 × 10-2 C. 1.3 × 101 D. 2.7 × 101 E. 2.7 × 103
"All distant galaxies are moving away from us, and the farther away a galaxy is from us, the faster it is moving" is a statement of ______________ law
Fill in the blank(s) with correct word