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Posts by Olin Lathrop‭

39 posts
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Q&A Magnetic charges to solve interaction between 2 magnetic dipoles

Using imaginary magnetic charges (usually called magnetic monopoles) to solve for forces between two magnets doesn't make sense. Even if magnetic monopoles existed, what exactly do you envision do...

posted 2y ago by Olin Lathrop‭

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Q&A What is the meaning that the universe is flat?

The universe could possibly wrap back onto itself, or it could be in infinite flat space. Imagine the difference between being on an infinite plane, or on the surface of a large sphere. In both o...

posted 2y ago by Olin Lathrop‭  ·  edited 2y ago by Olin Lathrop‭

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Q&A What happens if an electron collides with a proton?

While electrons have positive and protons have negative charge. They should collide and vanish, shouldn't they? No. They have other attributes than just being packets of charge. You have to cons...

posted 2y ago by Olin Lathrop‭

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Q&A Is it plausible to desire a "universal" calendar applicable everywhere in our universe?

It depends on what you want from your calendar. If you simply want a way to keep track of time, then you can base it on anything you like. The earth spinning on its axis, the moon orbiting the ea...

posted 2y ago by Olin Lathrop‭  ·  edited 2y ago by Olin Lathrop‭

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Q&A Calculating Surface temperatures of a thermal insulator

The "R value" of insulation is its thermal resistance. It tells you how much of a temperature difference is required to transfer a certain amount of heat power per unit area. The R-value you see ...

posted 2y ago by Olin Lathrop‭

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Q&A System of ODEs models in physics

Pretty much any system where the state of one thing effects the rate of another, and the state of that other thing effects the rate of the first. Surely you can think of a few of those. One examp...

posted 1y ago by Olin Lathrop‭

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Q&A Delta to Wye conversion

No, the answer can be seen by inspection in a few seconds, and it's not 2.8667. We don't just give answers to homework problems here, so I'll only make a few comments on the problem and your attem...

posted 3y ago by Olin Lathrop‭  ·  edited 3y ago by Olin Lathrop‭

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Meta Who should the temporary moderators be?

We need marketing more than moderators There is so little activity here, even one person can easily handle the rare moderation tasks. If you just need to put a name in a slot, then I'm willing to...

posted 2y ago by Olin Lathrop‭

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Meta What should this community's policy on "explain like I'm five" and similar statements be?

This site is not for five year olds. We are not kindergarten teachers. Asking a bunch of volunteers on the internet to explain physics to a five year old is a waste of time. Explanations at that...

posted 1y ago by Olin Lathrop‭

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Meta Book suggestion category proposal

"Which xxx is best?" are poor questions for this Q&A site. When "best" can't be quantified, all you really get is a popularity contest. Another problem is when the available choices change ov...

posted 2y ago by Olin Lathrop‭

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Q&A Conductivity with angle of light

We don't know the details of your setup, but most likely there was a partially reflective surface over the actual photoresistor. The photoresistor itself may also be partially reflective. A highe...

posted 2y ago by Olin Lathrop‭

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Q&A Calculate inductance using laws of electromagnetism

Can we use other laws of electromagnetism to calculate the inductance of a piece of wire just like we used Gauss's law to calculate the capacitance of the 2 seperated conductors? Yes. The inducta...

posted 1y ago by Olin Lathrop‭  ·  edited 1y ago by Olin Lathrop‭

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Q&A Would we need Alternating Current if superconducting wires existed?

The major advantage of Alternating Current is that it can be transmitted to large distances without significant losses, which is not possible in Direct Current. This is incorrect Answering the re...

posted 3y ago by Olin Lathrop‭  ·  edited 3y ago by Mithrandir24601‭

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Q&A How do I calculate which concentration of Vinegar is cheapest, before diluting it?

Let w be the price of water that I'll use to dilute. Forget that. Unless you are in extraordinary circumstances, the price of water is so low compared to the vinegar as to be irrelevant. How do ...

posted 7mo ago by Olin Lathrop‭  ·  edited 7mo ago by Mithical‭

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