Activity for Olin Lathropâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Edit | Post #281649 |
Post edited: |
— | almost 3 years ago |
| Edit | Post #281649 |
Post edited: |
— | almost 3 years ago |
| Edit | Post #281649 | Initial revision | — | almost 3 years ago |
| Answer | — |
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 attempted solution: While this is on topic here, you would probably get better response on the Electrical ... (more) |
— | almost 3 years ago |
| Comment | Post #281541 |
What's with the electric field strength in Newtons per square Coulomb? That's not the same as V/m as expected. Also, a uniform electric field will have a constant force on a point charge. Why do you expect a constant sideways force to have any effect on the pendulum frequency in the first place? ... (more) |
— | almost 3 years ago |
| Comment | Post #281404 |
Due to entropy, the universe is worth less over time. (more) |
— | about 3 years ago |
| Edit | Post #281366 | Initial revision | — | about 3 years ago |
| Answer | — |
A: If planet 9 exists, is it correct to say that it is a "dark planet"? Planet 9 would certainly be "dim", but whether it would be dark according you your definition is impossible to say. Planet 9 needs to be smaller or further away than Pluto, otherwise its gravitational effect would have been noticed more clearly by now. This means it probably reflects less light t... (more) |
— | about 3 years ago |
| Comment | Post #281359 |
The extra information you supplied about "dark planet" belongs in your question, not buried in a comment. (more) |
— | about 3 years ago |
| Comment | Post #281359 |
You need to define "dark planet". (more) |
— | about 3 years ago |
| Comment | Post #281321 |
Do the math! You need to melt a lot more than a liter or two of ice to have an appreciable cooling effect on a whole apartment. (more) |
— | about 3 years ago |
| Edit | Post #281296 |
Post edited: |
— | about 3 years ago |
| Edit | Post #281296 | Initial revision | — | about 3 years ago |
| Answer | — |
A: Does folding glasses increase the probability of separating at the hinge? It depends on what the failure was. Working the hinge could possibly make the little screw come loose quicker. This is the screw that acts as the shaft of the hinge. If the hinge actually broke, then excessive repeated stress is probably the cause. This is more likely to come from too much fo... (more) |
— | about 3 years ago |
| Comment | Post #281290 |
All your pictures show the *right* hinge coming apart. (more) |
— | about 3 years ago |
| Edit | Post #281181 | Initial revision | — | about 3 years ago |
| Answer | — |
A: How dangerous is mounting and firing a gun on another human's body part? This looks like something the soldiers are being trained to do, or were trained to do. This means procedures were likely worked out that mitigate most bad effects most of the time. The top picture in particular looks like a training exercise, and both soldiers are wearing obvious hearing protection... (more) |
— | about 3 years ago |
| Comment | Post #280987 |
*"What cleaning method is better?"* obviously depends on what is being cleaned (size, sensitivity to abrasion, sensitivity to cleaning chemicals, smooth/rough, accessibility, etc), the expected dirt to be removed (dust, grease, biological, etc), how clean it needs to be, for what purpose, etc. This ... (more) |
— | about 3 years ago |
| Comment | Post #280944 |
Does a meniscus really have a constant radius of curvature? (more) |
— | about 3 years ago |
| Comment | Post #280916 |
@dmckee: Higher index of refraction allows for less thickness change to get the same diopter. For negative diopter, the lens will be thin in the middle and thick on the outside. -7 is extreme (to the point where I wonder if it is correct), so the edges of the lenses will be significantly thicker th... (more) |
— | about 3 years ago |
| Edit | Post #280922 | Initial revision | — | about 3 years ago |
| Answer | — |
A: Why would a 1.74 index lens be more prone to chip and be less resilient than 1.67? To be optically equivalent, the lens made from lower index of refraction material needs to be thicker. My guess is that your optician thinks the metal grooved frames you want won't work well with the outer thickness of the lenses. Note that he's not saying 1.74 index is bad, but just that it's so... (more) |
— | about 3 years ago |
| Comment | Post #280732 |
The OP had clearly done absolutely no research, and made several false statements in his question. It's OK to be ignorant, but not OK to be stupid. If you really want to get an answer, then you shouldn't be lecturing as part of the question. A kick in the butt is useful for these kinds of situatio... (more) |
— | about 3 years ago |
| Edit | Post #280719 |
Post edited: |
— | about 3 years ago |
| Edit | Post #280719 | Initial revision | — | about 3 years ago |
| Answer | — |
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 rest of your question is pointless since it is based on a false premise. Instead, I'll elaborate why ... (more) |
— | about 3 years ago |
| Comment | Post #280486 |
Get the proper lamp for the light pattern you want. (more) |
— | over 3 years ago |
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