A supplier wants to make a profit by buying gold by weight at one altitude and selling it at the same price per newton at another altitude. The supplier should
A) buy at a high altitude and sell at a low altitude.
B) buy at a low altitude and sell at a high altitude.
C) disregard altitude because it makes no difference.
Answer: A
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The extreme size of volcanoes on Mars indicates that
a. Mars has a much thicker crust than Earth. b. water once flowed in streams on Mars. c. large moving plates have not formed on Mars. d. Mars has a much thicker crust than Earth and large moving plates have not formed on Mars. e. Mars has a much thicker crust than Earth, water once flowed in streams on Mars, and large moving plates have not formed on Mars.
As shown in the figure, a container has a vertical tube, whose inner radius is 32.00 mm, connected to it at its side
An unknown liquid reaches level A in the container and level B in the tube—level A being 5.0 cm higher than level B. The liquid supports a 20.0-cm high column of oil, between levels B and C, whose density is 460 kg/m3. What is the density of the unknown liquid? A) 1800 kg/m3 B) 2000 kg/m3 C) 1400 kg/m3 D) 1600 kg/m3 E) 1700 kg/m3
In a hydraulic-press operation, it is impossible for the
A) output displacement to exceed the input displacement. B) force output to exceed the force input. C) energy output to exceed the energy input. D) output piston's speed to exceed the input piston's speed. E) none of the above
State which element is oxidized and which is reduced in the reaction Al + 3F2 ? 2AlF3