The maximum amount of work that can be extracted is equal to the changein Gibbs free energy___________.
1 answer:
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Answer:
Explanation:
The resistance of a piece of wire is given by
where
is the resistivity of the material
L is the length of the wire
A is the cross-sectional area
In this problem, we have
L = 7.0 m
The diameter of the wire is 0.14 cm, so the radius is 0.07 cm, therefore the cross sectional area is
Therefore, the resistance is
Answer:
Negative
Positive
Explanation:
When a positive charge balloon is brought near the neutral metal can, the positive charge in the ballon, delocalization and arrangement of like charges occurs. The positive charge then flow to the an end while the negative charges flows to the other end.
Thus, after being touched, the charge on the can is negative.
And, If not touched, the charge on the ballon remains positive.
