swansont

Atoms are symmetric. How would you know they are rotating? What would that “look” like? From another perspective, how would you give the atom the angular momentum it would have to have, and how would it manifest itself?

Our sun has a solar wind - particles are emitted and/or accelerated by it. The detail you are missing is the density, or flux (the former for the nebula, the latter for the wind). The particles are energetic, but there probably aren't many of them, relatively speaking.

If one solves the equation for an infinite solenoid, one finds that the field inside is, indeed, uniform. The contributions from adjacent wires counteracts the drop-off from any single wire. As long as you are in a situation where the infinite appoximation holds, the field will be pretty close to uniform. "Analysis of magnetism" involves the application of equations, and I don't see any here.

Upon further review, I think you are right about those points. There is a several hundred point difference between the number of (upvotes + likes - downvotes) and the reputation score for the older-guard members, while for the newer folks I checked, the numbers match.

! Moderator Note Similar threads merged.

This fantastic scenario is moot. It rained like hell in the morning. One could have easily used wet conditions as an excuse.

Yes we can, and we've used it to deal with a few cases of abuse over the years. In some cases, a request to not abuse the system has sufficed, and in others, we have throttled the ability to give rep points.

That’s something one might expect you to know if you’ve claimed “An object large enough to "destroy" the moon is also large enough to pull the Earth off its' orbit.”

It’s not obvious to me that this is true. The ability to damage the moon would depend on momentum and energy, which can be large if v is large. Affecting the earth’s orbit would (largely) be a function of mass, and interaction time. A relatively small mass moving fast would minimize both.

It sounds like the answer is yes, even though there is no VAT when you buy stamps https://soundaccountingservices.com/pay-vat-postage/

Ah, yes, the days when I resided on Mount Olympus... I don't think those tallies were grandfathered in to the new system. Though when we trashed that and started with something more like our current system, new users started with 10 points. That went away, but those points remain. (There was a lurker who popped up recently, and someone wondered how they could have 3 posts and no upvotes, but 10 rep. This is how)

What are the units of q? It sounds like it's energy, in which case you have a unitless quantity on the right side of your equation, so it can't be equal to time. Why should time depend an exchange of energy? Making stuff up isn't science.

In a more professional sense, the friendship is less important. In science, the networking makes you aware of people in each particular sub-field, and makes it easier to approach these people for collaborations or to ask questions, since you've already been introduced. I've used my networking for jobs as well. I learned of my current job (years ago) because of who I know (and who those people know), and I have reached out to my network to tell them of job openings. That has brought people to interviews who might not have otherwise been aware of the job opening. The importance of networking is going to vary depending on what you are doing. One of the exchanges in networking is finding out who the disagreeable people are. If there is someone who is always taking but never reciprocates, you can find this out and avoid them.

I was once accused of not being a physicist because I don't drink coffee.

Unusual, yes, but probably not unheard of. Reviewers are generally volunteers (unlike thesis committee members), and occasionally one reviewer will not get their review returned in a timely fashion, so the journal has to go get another reviewer. Depending on the field, there might not be a lot of choices for qualified reviewers.

Now how about reading the OP to see why this doesn’t answer the question.

You might want to look into this some more; pinching is for a somewhat different set of conditions, but the general principles will still apply.

You would need to analyze the electrostatic and magnetic forces. Is this homework?

I don't recall all the details off the top of my head, but this is an effect seen in charged particle and ion beams. It's called a pinch, because the effect can bunch the particles together. Moving charges create the circular magnetic field, which is perpendicular to the current, and creates a force that "pinches" the particles into a tighter beam. The strength of the field and the magnetic force depend on the speed of the particles, so attraction vs repulsion winning is going to depend on how fast the particles are moving.

As studiot implies, it might be better to look at current rather than individual charges. Also, you have your directions reversed. The right-hand rule assumes positive current. Electrons moving onto the screen is like a positive current moving out, which will give you a counter-clockwise field. No field directly in front, i.e. on the x-axis for motion in the x direction.

Hexadecimal is base 16 (edit: xpost with uncool) It's factor of 10, not 100, and what's bogus about it? That makes it consistent with the rest of physics, which is based on SI units. Everything else in physics is done in decimal. We hang on to historical units like the minute, and longer intervals that are in common use, but the SI unit is the second, so it's perfectly consistent to apply decimal to fractions of a second.

The mainstay cartoon character from the Looney Tunes collection of Warner Brothers animated works. From back before cable TV. There might be more information on him if one were to search this "internet" thingy With friends like that...

I want to note for the record that when I had the chance to go to Albuquerque a few years ago, I made sure to make the proper left-hand turn, and ended up where I wanted to be.

If you learn it as 3D, rather than projected onto the 2D surface of a sphere.

As Mordred says, they mean vacuum, and that's the condition for c having the value it does and being invariant. If it's in a medium, none of that holds for the speed you measure. You would not refer to it as c in a medium (the speed would be c/n. where n is the index of refraction of the medium) And that has nothing to do with Newton's first law, which does not require a vacuum.