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Q. A 0.40 kg object attached to the end of a string of length 0.50- m is swung in a circular path and in a vertical plane. If a constant angular speed of 8.00 rad/s is maintained, what is the tension in the string what time the object is at the top of circular path?

Q. Unpolarized light is incident on a series of two Polaroid sheets. The intensity of the light emerging from the second sheet is 18.4 percent of the intensity of the light incident on the first sheet. Find out the angle between the transmissions axes of the two sheets.

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