Predict the energy transformation that occurs when carson sands a piece of wood with sandpaper.
1 answer:
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Answer:
R / 64
Explanation:
Let he length of the wire is L and its resistance is R.
The resistance of the wire is directly proportional to the length of the wire. As the wire is cut into 8 equal pieces so the resistance of small wire is R/8.
Now they are connected in parallel.
The equivalent resistance is given by
Thus, the equivalent resistance of the new cable is R / 64.
Answer:
The total energy is
Explanation:
From the question we are told that
The Poynting vector (energy flux ) is
The length of the rectangle is
The width of the rectangle is
The time taken is
The total electromagnetic energy falls on the area is mathematically represented as
Where A is the area of the rectangle which is mathematically represented as
substituting values
substituting values