Conversion of Units: Which of the following speeds is greatest? (2.54 cm = 1.00 in.)
A. 10 km/h
B. 10 m/s
C. 10 ft/s
D. 10 mi/h
E. 10 yd/s
Answer: B
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Starting from rest, a 20,000-kg aircraft being launched from an aircraft carrier goes from 0 to 90 m/s in 2 seconds. The net force acting on the aircraft is
a. 3,600,000 N. b. 1,800,000 N. c. 900,000 N. d. 450,000 N. e. 275,000 N.
The unsaturated zone of soil or rock above the water table is called the zone of ______________
Fill in the blank(s) with correct word
Kepler's second law of planetary motion states that:
A) a planet moves at its greatest speed when it is closest to the Sun. B) the more massive a planet is, the more its speed will be. C) all the planets move around Earth in elliptical orbits. D) the mass of a planet determines how far the planet is from the Sun.
A fatal flaw with Ptolemy's model is its inability to predict the observed phases of
A) the Sun during an eclipse. B) Mars and Jupiter. C) the Moon in its monthly cycle. D) Jupiter and Saturn. E) Mercury and Venus.