During the time the sand is falling from the upper chamber into the lower chamber, will the scale read lower than, higher than or exactly W? Be sure to discuss all factors and defend your answer.
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When all of the sand in an hourglass rests at the bottom chamber, a sensitive scale reads the exact weight (W) of the hourglass and sand. The hourglass is inverted and placed back on the scale.
Sand pours from the upper chamber into the lower chamber at a steady rate. During the time the sand is falling from the upper chamber into the lower chamber, will the scale read lower than, higher than or exactly W? Be sure to discuss all factors and defend your answer.
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