A stream of glass beads, each with a mass of 15 gram, comes out of a horizontal tube at a rate o...

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A stream of glass beads, each with a mass of 15 gram, comes out of a horizontal tube at a rate of 100 per second. The beads fall a distance of \( 5 \mathrm{~m} \) to a balance pan and bounce back to
P their original height. How much mass (in kg) must be placed W in the other pan of the balance to keep the pointer at zero?
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