Belts and zones are clouds that wrap around the entire planet
a. True
b. False
Indicate whether the statement is true or false
True
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Two small objects, with masses m and M, are originally a distance r apart, and the gravitational force on each one has magnitude F. The second object has its mass changed to 2M, and the distance is changed to r/4. What is the magnitude of the new gravitational force?
A. 32F B. 2F C. F/32 D. F/16 E. 16F
The atmosphere of Mars is composed of mostly carbon dioxide along with some nitrogen
Indicate whether the statement is true or false
During each cycle of its operation, a certain heat engine does 40 joules of work while exhausting 160 joules of thermal energy to the environment. The energy efficiency of this heat engine is
A) 75%. B) 80%. C) 25%. D) 20%. E) None of the above.
Consider the four U.S. non-renewable energy resources: gas, oil, coal, uranium without recycling for plutonium recovery. Assuming that we used each of these for a major portion of our energy needs, for which ones would domestic U.S
resources run out within some 50 years, and which ones does the United States have in much greater abundance? A) The United States is running out of gas and oil, but has abundant coal and uranium. B) The United States is running out of all four. C) The United States is running out of gas, oil, and uranium, but has abundant coal. D) The United States has abundant supplies of all four of these resources. E) The United States is running out of gas, oil, and coal, but has abundant uranium.