Answer:
A theory not only explains known facts; it also allows scientists to make predictions of what they should observe if a theory is true. Scientific theories are testable. New evidence should be compatible with a theory. If it isn't, the theory is refined or rejected.
Explanation:
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Answer
Work done will be
and it will be positive
Explanation:
We have given charge 
We have to find work done in moving the charge from 15 volt to 8 volt
Let 
So potential difference 
We know that work done
, here Q is charge and V is potential difference
So work done 
It will be positive work done because work is done in moving charge from higher potential to lower potential
<em>The distance between the image and its leans is 19.04 cm...</em>
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This is not that exact but I hope that this will help you.
The effect of gravity is more in liquid than in solid because as we know that liquid pressure increase in the increase in depth but solid dont