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Q. A 275 ball is tied to a string. It is pulled to an angle of 4 and released to swing as a pendulum. A student with a stopwatch finds that 17 oscillations take 20.
How long is the string?

Q. A copper kettle contains water at 24 0 C. When the water is heated to its boiling point the volume of the kettle expands by 1.2 x 10 - 5 m 3. Establish the volume of the kettle at 24 0 C.

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Category:- Physics
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