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# A student holding two dumbbells against his chest stands on a turntable while two other His... A student holding two dumbbells against his chest stands on a turntable while two other His rotational inertia in this position is 18.8 kg m2. If the student on the turntable is initially rotating at 2.15 rad/s and then extends his arms so that his rotational inertia increases by 33.2%, what is his new rotational speed?

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