Activity for Olin Lathropâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Comment | Post #287953 |
I can't make any sense of your question. The poor English, to the point of causing confusion, doesn't help. *Does every time a drop push toothpick back into bottle?* Drop from **where**? Your diagram shows no drops. So this toothpick can move? How is it held? The diagram shows the toothpick ove... (more) |
— | about 1 year ago |
| Comment | Post #287068 |
The description is way too confusing to follow. Include a diagram, then we might have a chance to understand your setup. This question should be closed until then. Flagging for moderator attention. (more) |
— | over 1 year ago |
| Comment | Post #287039 |
C is a fixed point, so it can't be both at the center of the pool and on the surface of the water. The center is 1 m below the surface.
F1 is a force, but is specified in units of mass. Even assuming 1g gravity, you can't apply any significant force to the surface of the water (ignoring surface ... (more) |
— | over 1 year ago |
| Comment | Post #286906 |
Shouldn't that be "-" in first equation? (more) |
— | over 1 year ago |
| Comment | Post #286898 |
In addition, your "measurement value" is really hard to parse, to the point of being rude. -1 for the sloppiness. (more) |
— | over 1 year ago |
| Comment | Post #286842 |
All charges are equal, so "sorting" them doesn't make any sense. Sort by what criteria? (more) |
— | over 1 year ago |
| Comment | Post #286404 |
Canina already mentioned the speeds, but also consider how long it would take to get to those speeds. To prevent squishing your cosmonaut, you probably want to keep long term acceleration to 1 g. At that rate, it takes about 6 months just to get to ½c, at which time dilation is still very sm... (more) |
— | almost 2 years ago |
| Comment | Post #285323 |
-1 for the many undefined variables. Ping me when fixed and I'll undo the downvote. (more) |
— | about 2 years ago |
| Comment | Post #285193 |
You have posted a lot of questions here without defining what your variables mean. The E=mc<sup>2</sup> equation is well known enough that most people probably understand that E is energy, m is mass, and c is the speed of light. However, you don't define terms in more obscure equations either. Wha... (more) |
— | about 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Comment | Post #281290 |
All your pictures show the *right* hinge coming apart. (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 |
| 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 |
| Comment | Post #280486 |
Get the proper lamp for the light pattern you want. (more) |
— | over 3 years ago |