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Let X= {a, b, c} and Y= {u, v}. Which of the following arrow diagrams define functions from X to Y ?

Heat capacity is a measure of the heat required to _____. 

What is the tendency of a substance to resist change in temperature with the gain or loss of heat called? 

The two atmospheric circulation cells that converge at the equatorial low creating the doldrums are known as _____. 

What cycle refers to the constant motion of water as it circulates between the oceans, the atmosphere, and the land? 

The flow of surface water in the ocean around the periphery of an ocean basin is called a _____. 

The temperature and water content of air greatly influence its _____.  

The solar heating of Earth varies with latitude, due mostly to _____. 

_____ is the number of waves passing a fixed point per second. 

Wind waves at many wavelengths and heights may approach a single spot from different directions to form a(n) _____.