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Two ice skaters stand facing each other at rest on a frozen pond. They push off against one another and the48 kgskater acquires a speed

Two ice skaters stand facing each other at rest on a frozen pond. They push off against one another and the48 kgskater acquires a speed of0.68m/s.If the other skater acquires a speed of0.83m/s,what is her mass in kilograms?

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