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0answers
13 views

Is a 6“ dust collection hose and inlet better than a 4” one? [closed]

I'm in the process of buying a dust collection system for my small hobbyist woodworking shop. My tools have 4" ports. Here's three potential setups. Setup A ...
2
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1answer
78 views

Whirlwind/tornado/dust devil in the middle of nowhere

I live in area which have many properties similar to desert. Many times when I drive by I see a whirlwind/tornado/dust devil of sand or other garbage parts. I would like to ask how this was normally ...
4
votes
2answers
737 views

Physics behind the flow of gas coming out of a balloon

I'm working with stratospheric balloons (latex ones) and I want to put a valve on it so it can float for a longer time. I'm trying to define which valve I should use, which demands I estimate the flow ...
4
votes
1answer
864 views

Air flow coming out of a fan feels much stronger than air flow coming in. Why? [duplicate]

Possible Duplicate: Why is exhaling more forceful than inhaling? If I put my hand behind my computer's system block, I can feel a very strong flux of air coming out, as it is being pushed ...