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A barge is in a rectangular lock on a freshwater river. The lock is 60.0 m long and 20.0 m wide, and the steel doors oneach end are closed. With the barge floating in the lock, a2.50 x 10^6 N load of scrap metal is put onto the barge. Themetal has densith 9000 kg/m^3.

a) Whe the load of the scrapmetal, initially on the bank, is placed onto the barge, whatvertical distance does the water in the lock rise?

b) The scrap metal is now pushed overboard into the water. Does the water level in the lock rise, fall, or remain the same? If it rises or falls, by what vertical distance does it change?

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