Kirchhoff's rules are the junction rule and the loop rule. Which of the following statements is true?
a. The junction rule is based on the conservation of charge, and the loop rule is based on the conservation of energy.
b. The junction rule is based on the conservation of energy, and the loop rule is based on the conservation of charge.
c. Both rules are based on the conservation of charge.
d. Both rules are based on the conservation of energy.
Question 2
A tetherball is attached to a pole with a 2.0-m rope. It is circling at 0.20 rev/s. As the rope wraps around the pole, it shortens. How long is the rope when the ball is moving at 6.0 m/s?
a. 1.8 m
c. 1.2 m
b. 0.83 m
d. 1.0 m
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