Recent content by nweissma

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    MHB Abstract algebra: i need examples of ...

    please offer me examples of: a) 3 vector spaces over the same field; and b) the same vector space over 3 fields.
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    I What is *not* a Vector Function?

    i never thought of it before! every function that I've encountered has been a 'vector function' .. so what is not a vector function?
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    What is the Best Caliper for the Money at $50?

    follows is arceurotrade company's response to my request to purchase ... Dear Mr. Weissman, Many thanks for your email. Unfortunately, due to our product liability insurance we are not permitted to ship any electrical based products to the USA. We are more than happy to consider orders for...
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    What is the Best Caliper for the Money at $50?

    might you know the brand names for the United States .. perhaps on eBay, amazon.com, .. i assume that shipping charges from the uk are steep.
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    What is the Best Caliper for the Money at $50?

    can you identify a particular brand and model because I'm a stranger in a strange land. would i realize an advantage by using the mechanical vernier ? what do you think of these three...
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    What is the Best Caliper for the Money at $50?

    size range ≤ ½" i guess dial type; is there an advantage to vernier type? is digital in this price range less accurate or less robust ? i need to measure cylinder diameters to the nearest 1/64" .. likely less than 15/32"
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    What is the Best Caliper for the Money at $50?

    apologies to all if this post is considered inappropriate: i do not know a mechanical engineer nor have i ever needed to own a caliper. i seek a recommendation for a caliper of any design strategy that costs ≈$50 (±) and is the best-value-for-the-dollar.
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    How Does Carbon's Vacant 3rd p-Orbital Influence sp3 Bonding?

    Does this promotion+tetrahedron happen with Boron, Nitrogen, Oxygen, Fluorine, or Neon -- or with any element other than Carbon?
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    How Does Carbon's Vacant 3rd p-Orbital Influence sp3 Bonding?

    I'm merely familiar with the concept of electron promotion but from what little I know your explanation does not seem to account for the promotion: does the promotion occur first or does the tetrahedral bonding occur first; if the former then where is the promotional energy coming from and if...
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    How Does Carbon's Vacant 3rd p-Orbital Influence sp3 Bonding?

    Why/How does Carbon's 3rd p-orbital contribute to its bond -- sp3 -- if it's vacant?
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