1. Read the comic below and answer the following questions. WHAT ARE YOU DOING? SPINNING COUNTERCLOCK WISE EACH TURN ROBS THE PLANET OF ANGULAR MOMENTUM SLOWING ITS SPIN THE TINIEST BIT LENGTHENING THE NIGHT, PUSHING BACK THE DAWN GIVING ME A LITTLE MORE TIME HERE WITH YOU (a) If her rotation is lengthening the night, is she in the northern or southern hemi- sphere? Explain. Note that if you are looking down on the North Pole, the Earth spins counter clockwise. Likewise, the rotation is clockwise if you are looking down onto the South Pole. (b) Assume she standing on the Pole (based on your answer to part a) and is rotating at 2 rev/s. You can assume she is a solid cylinder weighing 60kg with a 0.6m diameter. How much time might she gain for them? (Unsurprisingly this will be a very small number. So small, your calculator will probably just return 0, so you can leave your solution as an expression). You may need to use the fact that the Earth has mEarth = 6 x 10²4kg and radius REarth = 6 x 10€m and takes 86400s to complete one rotation.
1. Read the comic below and answer the following questions. WHAT ARE YOU DOING? SPINNING COUNTERCLOCK WISE EACH TURN ROBS THE PLANET OF ANGULAR MOMENTUM SLOWING ITS SPIN THE TINIEST BIT LENGTHENING THE NIGHT, PUSHING BACK THE DAWN GIVING ME A LITTLE MORE TIME HERE WITH YOU (a) If her rotation is lengthening the night, is she in the northern or southern hemi- sphere? Explain. Note that if you are looking down on the North Pole, the Earth spins counter clockwise. Likewise, the rotation is clockwise if you are looking down onto the South Pole. (b) Assume she standing on the Pole (based on your answer to part a) and is rotating at 2 rev/s. You can assume she is a solid cylinder weighing 60kg with a 0.6m diameter. How much time might she gain for them? (Unsurprisingly this will be a very small number. So small, your calculator will probably just return 0, so you can leave your solution as an expression). You may need to use the fact that the Earth has mEarth = 6 x 10²4kg and radius REarth = 6 x 10€m and takes 86400s to complete one rotation.
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