do vacuums lose suction power the longer the hose is? How does that work?
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Each bit of hose you add increases the friction (the resistance to air flowing inside the hose). The impellor in the vacuum is designed to move a particular volume of air at a particular rate. Changing the diameter of the hose would also affect it. But the biggest impact is the drag on the air molecules caused by friction due to the lengthened hose.
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