Why is one region of a water molecule slightly negatively charged?
A) The oxygen atom attracts protons more strongly than the hydrogen atoms do.
B) The hydrogen atoms attract protons more strongly than the oxygen atom does.
C) The oxygen atom attracts electrons more strongly than the hydrogen atoms do.
D) The hydrogen atoms attract electrons more strongly than the oxygen atom does.
C
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A heavy block is suspended at rest by a vertical rope. When you raise the block at a constant velocity, the rope tension
A. is zero. B. is greater than its weight. C. is less than its weight. D. equals its weight.
This variable atmospheric component can exist in all three states of matter (solid, liquid, and gas) at the temperatures and pressures that normally exist on Earth
A) water B) ozone C) nitrogen D) methane E) oxygen
As large species of fish are overfished, the fishing industry is shifting to smaller marine species. About 90% of this catch is converted to fishmeal and fish oil, most of which is ____.
A. fed to cattle B. fed to farmed fish C. made into nutrient supplements D. used for cooking E. discarded
Describe the patterns in grain trade between different world regions over the last 70 years. How does the food crisis of 2006–2008 and food shortages of 2010–2011 relate to these patterns?
What will be an ideal response?