Two objects of different mass are released simultaneously from the top of a 20-m tower and fall to the ground. If air resistance is negligible, which statement best applies?
a. The greater mass hits the ground first.
b. Both objects hit the ground together.
c. The smaller mass hits the ground first.
d. No conclusion can be made with the information given.
b
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Given the equation 
, which answer provides the best description of a possible physical situation?
A. A 3.00-kg mass is suspended from the ceiling. B. A 2.00-kg mass hanging over a pulley drags a 3.00-kg mass along a frictionless horizontal surface. C. A 3.00-kg mass hanging over a pulley drags a 2.00-kg mass along a frictionless horizontal surface. D. A 3.00-kg mass hanging over a pulley drags a 5.00-kg mass along a frictionless horizontal surface. E. A 5.00-kg mass hanging over a pulley drags a 3.00-kg mass along a frictionless horizontal surface.
Many terrestrial weather patterns have been observed and named, for example, the Southern Oscillation, the Arctic Oscillation/North Atlantic Oscillation, the Pacific Decadal Oscillation, and so on
How are these indices useful in the discussion of weather and climate?
Carts A and B have equal masses and travel equal distances on straight frictionless tracks while a constant force F is applied to A, and a constant force 2F is applied to B. The relative amounts of work done by the two forces are related by
a. WA = 4 WB. b. WA = 2 WB. c. WA = WB. d. WB = 2 WA. e. WB = 4 WA.
A 340-Hz sound wave travels at 340 m/s in air with a wavelength of
A) 1 m. B) 10 m. C) 100 m. D) 1000 m. E) none of the above