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Any help will be appreciated.

1. Water flows over a section of Niagara Falls at a rate of 1.2x10^6 KG/s and falls 50m. How many 60W bulbs can be lit with this power?

2. A bullet with a mass of 5g and spped of 600m/s penetrates a tree to a depth of 4cm. Determine the frictional force that stops the bullet. Determine how much time elapsed from the moment the bullet entered the tree and the moment it stopped.

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# HW help

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