A container of cement at a construction site is raised by a rope at constant speed. Compared with the force of gravity on the container, the upward force supplied by the rope is
A. equal.
B. greater.
C. less.
D. none of the above
Answer: A
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Even though a tremendous amount of the sun's energy strikes the Earth every day, why doesn't the Earth overheat?
A) Much of the heat melts rocks, forming lava deep inside the Earth. B) Most of the energy is used in photosynthesis to help plants grow and survive. C) The energy mostly is absorbed in various weather systems. D) The energy is ultimately radiated back to space.
Which of the following is not a general shape upon which scientists classify dunes?
A) rectilinear B) cresentic C) linear D) star
Which is NOT TRUE regarding capitalism?
A) A division of wealth often exists between cities and the countryside. B) Capital seeks out the highest rate of profit. C) Capitalism can cause uneven spatial development (wealth of New York versus situation of Detroit). D) Prior to colonialism, Europe was the wealthiest and most advanced area of the world. E) Colonialism enhanced the wealth of Europe.
The origin of dust devils would be most similar to
A. virga. B. haboobs. C. microbursts. D. tornadoes.