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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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.
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