Activity for Olin Lathrop
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Edit | Post #285586 | Initial revision | — | over 2 years ago |
| Answer | — |
A: Why series springs behave like parallel? A comparison between parallel resistance and series spring. The spring constant specifies force per compression distance. When you put multiple spring in series, the force on each spring is the same, which is also the overall force on the combined spring. The forces don't add. However, the displacements do add. If you have three springs in series with... (more) |
— | over 2 years ago |
| Edit | Post #285299 |
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— | over 2 years ago |
| Edit | Post #285299 | Initial revision | — | over 2 years ago |
| Answer | — |
A: Are lamps, with blistering light bulbs exposed and facing down on the user, dangersome? I'd say it's not the best design. Maybe that's why they discontinued it. However, there are also advantages. Cooling will be a little easier without a cover. But the real advantage is price. Ultimately, it is up to the consumer how much they care about the lower price, versus the chance of a... (more) |
— | over 2 years ago |
| Edit | Post #285153 | Initial revision | — | over 2 years ago |
| Answer | — |
A: Are there areas in the observable universe which surely cannot support life as we know them? After 4 edits, it seems you are asking whether there are places in the universe where galaxies can form, but planets in those galaxies can't support life. It seems you want life to be impossible due to some large-scale phenomenon that effects multiple galaxies, and not due to local conditions within... (more) |
— | over 2 years ago |
| Comment | Post #284890 |
I don't understand what we're looking at in the second picture. Is that part supposed to rotate? Where is the axel? That round thing doesn't seem to be a wheel, but what is it? Closeups are good, but remember that they require context to understand. That context is missing here. (more) |
— | over 2 years ago |
| Comment | Post #284890 |
How is it relevant that the unit is out of warranty, or that you can't afford a new one? What information is that supposed to convey for the purpose of explaining why the wheels are binding? I won't even guess because there seems to be something here I'm not getting. (more) |
— | over 2 years ago |
| Edit | Post #284870 | Initial revision | — | over 2 years ago |
| Answer | — |
A: Calculate Center of Thrust The center of thrust is effectively the weighted average of all the thrust locations. The weighting for each location is proportional to how much the thrust from that location contributes to the overall thrust. That is simply the dot product of the thrust from the specific location to the total thr... (more) |
— | over 2 years ago |
| Edit | Post #284739 | Initial revision | — | over 2 years ago |
| Answer | — |
A: 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 do it, but I'm probably not the best person for the job. The real point is that you need to promot... (more) |
— | over 2 years ago |
| Edit | Post #284441 |
Post edited: |
— | over 2 years ago |
| Edit | Post #284441 | Initial revision | — | over 2 years ago |
| Answer | — |
A: Should I always write units in equation no matter if it looks like variable? You are somewhat misquoting what I said. It would help if you provide a link to the comments you are asking about, but the issue was most likely about lack of units on numeric values, not variables. A number is dimensionless unless you explicitly provide units. A variable can be defined to have ... (more) |
— | over 2 years ago |
| Edit | Post #284431 | Initial revision | — | over 2 years ago |
| Answer | — |
A: What is Ether theory? (I think the book I read is misinterpreting Ether) Back when what light is and how it propagates was poorly understood, people naturally related it to sound. Sound propagates thru a medium, like air. Light was therefore assumed to propagate thru a medium too. This hypothetical medium was referred to as the ether. While this line of reasoning is... (more) |
— | over 2 years ago |
| Edit | Post #283996 |
Post edited: |
— | over 2 years ago |
| Edit | Post #283996 | Initial revision | — | over 2 years ago |
| Answer | — |
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 earth, and the earth orbiting the sun are irrelevant. However, most calendar systems were developed to ... (more) |
— | over 2 years ago |
| Edit | Post #283523 | Initial revision | — | over 2 years ago |
| Answer | — |
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 consider mass too. That mass (or you can think of it as the equivalent energy) doesn't just disappear. S... (more) |
— | over 2 years ago |
| Comment | Post #283448 |
Actually your second equation is completely wrong (assuming the first is right) because the units don't match. Whatever m is, it has units of mass in the first equation, but is dimensionless in the second. We don't need to look any further to tell that the second equation clearly doesn't agree with... (more) |
— | over 2 years ago |
| Edit | Post #283395 |
Post edited: |
— | over 2 years ago |
| Edit | Post #283395 | Initial revision | — | over 2 years ago |
| Answer | — |
A: Why we can't find a particle accelerating unless there's some other particle accelerating somewhere else? The third law says we will never find a particle accelerating unless there’s some other particle accelerating somewhere else. The other particle might be far away, as with the earth–sun system, but it’s always out there somewhere. This was probably embedded in more context. It seems the point he ... (more) |
— | over 2 years ago |
| Edit | Post #283304 | Initial revision | — | over 2 years ago |
| Answer | — |
A: 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 over time. Let's not go there. (more) |
— | over 2 years ago |
| Comment | Post #283251 |
But 1: That's not how gravitational fields work, and 2: This is not stated in your question. (more) |
— | over 2 years ago |
| Comment | Post #283251 |
Too unclear and confusing. See comment. (more) |
— | over 2 years ago |
| Comment | Post #283251 |
Your question makes no sense because you can't suddenly "enter" your gravitational field at t=0. You show yourself that it exists in all space. And then what is supposed to happen to this test object? Is it supposed to just move inertially? This question is too confusing and poorly stated to be a... (more) |
— | over 2 years ago |
| Edit | Post #283266 | Initial revision | — | over 2 years ago |
| Answer | — |
A: Signal modeling as only digital, only analogue, or as both This depends, of course, on what you are trying to achieve with the model. Remember that a model is a simplification for purpose of analysis, because the full physics is either too complicated or contains too many unknowns. By necessity, some real-world details are always left out of any model. ... (more) |
— | over 2 years ago |
| Edit | Post #283214 |
Post edited: |
— | over 2 years ago |
| Edit | Post #283214 | Initial revision | — | over 2 years ago |
| Answer | — |
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 of these 2D worlds, the universe would appear to extend infinitely in all directions. Yes, in the sphe... (more) |
— | over 2 years ago |
| Edit | Post #282730 | Initial revision | — | almost 3 years ago |
| Answer | — |
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 doing with them to solve for the force between two magnets? Each magnet contributes to the magnetic fie... (more) |
— | almost 3 years ago |
| Edit | Post #282186 |
Post edited: Fixed grammar. |
— | almost 3 years ago |
| Edit | Post #282193 | Initial revision | — | almost 3 years ago |
| Answer | — |
A: Natural ways to acquire gravity for a colony on earth's moon No, going deeper into the moon would reduce gravity. This is covered by the shell theorem of gravity, proved by Newton centuries ago. If you have an evenly-distributed mass shaped as a hollow sphere, then two things follow: Outside the shell, the gravity is the same as if the mass was all at t... (more) |
— | almost 3 years ago |
| Suggested Edit | Post #282186 |
Suggested edit: Fixed grammar. (more) |
helpful | almost 3 years ago |
| Edit | Post #281842 |
Post edited: |
— | almost 3 years ago |
| Edit | Post #281842 | Initial revision | — | almost 3 years ago |
| Answer | — |
A: decibel level of human hearing(human-auditory-range) There seems to be some confusion about decibels here. "Decibel" stands for deci⋅Bel, meaning 10x of a Bel. A Bel is the log10 ratio of two powers, named for Alexander Graham Bell. Since a Bel is a large jump in human terms, the world has converged to largely use decibels, abbreviated "dB". ... (more) |
— | almost 3 years ago |
| Comment | Post #281722 |
*"As driver for this ultra-fast expansion, cosmologists hypothesise a so-called inflaton field which drove the expansion, and which essentially disappeared at the end of inflation."* In other words, "We have no clue, so we're going to say magic happened.". (more) |
— | almost 3 years ago |
| Edit | Post #281649 |
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— | almost 3 years ago |
| Edit | Post #281649 |
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— | almost 3 years ago |
| Edit | Post #281649 |
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— | almost 3 years ago |
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