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Two students wish to reduce the random error in measuring the period in their pendulum experiment. They use a 1 m long pendulum and release the bob at 10o. Which student do you agree with? Explain your reasoning.
Student 1: I believe that we should measure the time for the pendulum to swing for 6 complete cycles and then divide by 6 to get the time for one single period. This will reduce the overall random error associated with starting and stopping the stopwatch.
Student 2: I disagree that this is the best approach. The pendulum will slow down enough by the 6th swing that the measured time will no longer be accurate.
A sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere.
A resistor is in the shape of a cube, with each side of resistance R . Find the equivalent resistance between any two of its adjacent corners.
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