Hi!

My previous/alt account is yetAnotherUser@feddit.de which will be abandoned soon.

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Joined 2 年前
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Cake day: 2024年6月1日

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  • If you (or anyone else) wants to check their understanding of voltage as the difference between two electric potentials, here’s a couple exercises I stole from a text book:

    (Note: Electric potential is also measured in Volt.)

    A battery has a constant voltage of 1.5V between its plus and its minus pole. What is the electric potential of the minus pole compared to ground potential when:

    1. The battery is on an electrically isolating mat?
    Solution

    The battery is not connected to ground. Therefore, no statements about the electric potential of either pole can be made.

    1. The minus pole is connected to ground?
    Solution

    Because of the connection, the electric potential of the minus pole equals that of the ground, which is by definition 0V.

    1. The plus pole is connected to ground?
    Solution

    Now the potential of the plus pole equals that of the ground. We know that the voltage difference between the plus and minus pole is 1.5V. Since this difference is measured by subtracting the potential of the minus pole from the potential of the plus pole the equation: 1.5V = p_plus - p_minus = 0V - p_minus => p_minus = -1.5V.

    Therefore the potential of the minus pole is -1.5V.

    1. The plus pole is connected to a generator producing an electric potential of 10,000V compared to ground?
    Solution

    Now the electric potential of the plus pole is also 10,000V. The potential of the minus pole must be 1.5V lower, so it must equal 9998.5V.






  • Vinegar?

    Proper pipe cleaning is done using a sodium hydroxide solution. Plus, it causes permanent blindness if it comes in contact with eyes:

    Other common uses of sodium hydroxide include: […]

    • as drain cleaners that convert pipe-clogging fats and grease into soap, which dissolves in water

    Like other corrosive acids and alkalis, a few drops of sodium hydroxide solutions can readily decompose proteins and lipids in living tissues via amide hydrolysis and ester hydrolysis, which consequently cause chemical burns and may induce permanent blindness upon contact with eyes.

    https://en.wikipedia.org/wiki/Sodium_hydroxide

    It’s genuinely dangerous, don’t handle this stuff if you don’t wear proper eye and skin protection.











  • Sadly that’s not it, I was using offline maps.

    I’m not entirely sure what’s the exact issue, but it only really occurs when trying to change LoD quickly. E.g. clicking on an inter-city bus route and zooming out to see it in its entirety or zooming back in. From 10 km to 500 m can take 3-4 seconds which is enough to feel sluggish if you’re doing it often.

    Probably not the most popular use case but it can get frustrating after a while nonetheless