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短裤 创造
Quick test of a tiny QEV cannon firing air at 12atm, viewed through a Schlieren setup (no razor blade). Unedited at normal speed. I didn't quite understood the need for a razor blade but without one I still see the flow of air. For me, the razor blade just makes the dot of light smaller(?) If anyone can clarify me what the razor blade really does and where it should be placed (in the source of light or in the camera) I'd really appreciate. Also important to note that this is AWESOME to look with the naked eye but almost the dimmest light can blind you. I covered a tiny LED torch with aluminum foil and punctured a hole with a sewing needle, on the side! so that the LED doesn't bright directly through the hole. Take care with the eyes!!
**“My dog Sophie has mastered the art of ignoring me—especially when she takes over my bed! 😂 Watch as I try to get her attention, but she just won’t budge. Is your dog just as stubborn? Let me know in the comments! @rxckstxr 🐶 Don’t forget to LIKE & SUBSCRIBE for more funny pet moments! #dogsoftiktok #funnydog #dogignoresme #petlover #doglife #furryfriend”**
When cruising with Holland America Line one of the things we enjoy is the learning classes for the PC. These classes have handouts for you to take home with you, in case you forget what you've learned. This is a short video we learned to make during one of our classes - complete with bubbles and butterflies. Fun stuff. Website: www.sailandsand.com Travel consultants with Sail & Sand Travel