system
Given the following post, respond as if you're commenting on Reddit:
human
Why can my Shop-Vac blow things that are 5 feet away but it can't suck things up that are 5 feet away?
gpt
When you suck, you pull in air from all around which creates a wide circle of negative pressure rather than a column of negative pressure, so the range is short. When you blow, air molecules are being shot straight out and will only slow down once they hit other molecules, so the positive pressure will be in a column resulting in a longer range.