Chemical rockets work on which basic physical principle?
A) Kepler's first law of planetary motion
B) Einstein's special theory of relativity
C) Newton's third law of motion
D) the law of conservation of energy
C
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The source of the earth's magnetic field is thought to be due to the motion of charged particles in the earth's
A) mantle. B) crust. C) inner core. D) outer core. E) mantle & crust.
How many atoms of oxygen are in 1.00 mol of sulfur dioxide, SO2?
a. 64.1 b. 64.1 × 6.02 × 10^23 c. 12.0 × 10^23 d. 6.02 × 10^23
According to the uncertainty principle, which of the following statements is true?
A) It is impossible to measure both the mass and the momentum of a particle at the same time. B) It is impossible to measure both the position and the momentum of a particle at the same time. C) It is impossible for science to make any meaningful predictions about nature whatsoever. D) It is impossible to measure both the speed and direction of a particle at the same time.
Plate tectonics differs from continental drift because it
A) provides a credible driving force. B) did not explain the fit between South America and Africa. C) showed that ancient ice sheets did not exist. D) showed that Pangaea broke up much later than predicted.