The only widely-accepted activity of that sort is the universal habit
of operating our bodies on the solar energy stored in plants.
Other than that, the availability of free solar energy in the forms of
real-time wind and radiation is still not used to any great extent, as
a percentage of worldwide energy demand. By and large, energy
consumers are still a lot more comfortable with the chemical energy
stored in wood, coal, and rotted dead dinosaurs.
Observe that the given vector field is a gradient field:
Let 
, so that
Integrating the first equation with respect to 
, we get
Differentiating this with respect to 
gives
Now differentiating 
with respect to 
gives
Putting everything together, we find a scalar potential function whose gradient is 
,
It follows that the curl of is 0 (i.e. the zero vector).
Answer:
Bo (modern symbol B) = Boron
Explanation:
Hope this helps
Answer:
First law: An object either remains at rest or continues to move at a constant velocity, unless acted upon by an external force. (i.e. Objects in motion tend to stay in motion. Objects at rest tend to stay at rest.)
Third law: When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body.
Explanation:
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