A projectile is launched vertically at 50 m/s. If air resistance is negligible, its speed upon returning to its starting point is
A) less than 50 m/s.
B) 50 m/s.
C) more than 50 m/s.
B
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Discuss how Silurian and Devonian reefs differed from Cambrian reefs. What will be an ideal response?
Complex networks of interconnected food chains are ____.
A. food webs B. food distribution interactions C. trophic levels D. pyramids of energy E. trophic chains
A studio apartment in Paris has an area of 75.0 square meters. A New York apartment with which of the following areas most closely has the same area as the Paris apartment? [1 meter = 1.094 yards]
A) 90.0 square feet B) 270. square feet C) 675 square feet D) 810. square feet
The world's desert regions:
a. have always had arid climates. b. are 99 percent covered by active sand dunes. c. are fragile environments. d. have no vegetation. e. have no relief.