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Lainsay was trying to water the flowers with the hose, but even with the water turned up to full forces she could not get it to reach the farthest flowers. Her sister told her to cover part of the end of the hose with her thumb. When she did this, the water shot out farther. Why did putting her thumb over the end of the hose make a difference?
The same amount of energy in the water was forces through a smaller space.