Hank does his best to convince us that chemistry is not torture, but is instead the amazing and beautiful science of stuff. Chemistry can tell us how three tiny particles – the proton, neutron and electron – come together in trillions of combinations to form … everything. In this inaugural episode of Crash Course Chemistry, we start out with one of the biggest ideas in chemistry ever – stuff is made from atoms. More specifically, we learn about the properties of the nucleus and why they are important to defining what an atom actually is.
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Table of Contents
Einstein & Atoms 02:05
Composition of Atoms 03:18
Atomic Number 04:20
Relative Atomic Mass 07:26
Mass Number 07:44
Watch the SciShow episodes on the Strong Nuclear Force here: https://www.youtube.com/watch?v=Yv3EMq2Dgq8
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A weld repair on a machined stainless steel part. Tig welding is way to salvage parts that might otherwise have to be scrapped. In this video, er308L tig welding rod is used to tig weld build up an area that was mistakenly machined. Happens all the time. Misdrilled or oversized drilled holes, tool changer crash, part dropped on floor has flat spot, tap broken off in threads, etc. All kinds of things happen that can be fixed with tig welding.
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