Science is a body of knowledge that extends back to
A) humankind's beginnings.
B) Greece in the 7th century B.C.
C) Italy in the 16th century.
D) the time of Galileo.
Answer: A
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Heliocentric Solar System model
A. Solar Eclipses |
B. Alpha Centauri |
C. Proxima Centauri |
D. Lunar Eclipses |
E. Nicolas Copernicus |
F. Claudius Ptolemy |
The bob of a conical pendulum swings in a
A) to-and-fro path. B) circular path. C) chaotic path.
Andrea and Chuck are riding on a merry-go-round. Andrea rides on a horse at the outer rim of the circular platform, twice as far from the center of the circular platform as Chuck, who rides on an inner horse. When the merry-go-round is rotating at a constant angular speed, Andrea's angular speed is
1.twice Chuck's. 2.the same as Chuck's. 3.half of Chuck's. 4.impossible to determine.
Kinetic Energy: If the kinetic energy of a proton is 80% of its total energy, what is the speed of the proton?
A. 0.02c B. 0.87c C. 0.98c D. 1.0c