If the Sun collapsed to become a black hole, the Earth's gravitational attraction to it would be
A. less.
B. more.
C. no different.
Answer: C
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If the number of molecules in an air parcel was fixed and the volume of the parcel was to decrease, then which of the following would result?
A. The mass would increase. B. The density would increase. C. The mass would decrease. D. The density would decrease.
What is the greatest source of oxygen in deep water?
A) The respiration from bacteria B) The lack of large quantities of organisms C) Chemosynthesis D) Polar waters that have sunk from the surface
Despite recent economic growth, almost half of the people in Sub-Saharan Africa subsiston less than $1.25 per day
a. True b. False Indicate whether the statement is true or false
Describe the process in which chlorofluorocarbons are thought to break down ozone
What will be an ideal response?