Recent content by .Scott

I read through the article. This is their conclusion (in part): Intriguingly, the smallest PBH mass that can lead to significant human injury (Eq. (3)) lies near the lower bound on PBH dark matter in Eq. (1), raising the possibility that the absence of such events could provide an additional...

I believe @haruspex nailed it. A charge induce on the ground by a cloud is called induction. It's the term used in that situation.

I would interpret the diagram this way: Both clouds are discharging electrons (negative charge) to the ground. This is evidence that there had previously been a charge induced between the clouds and the ground. Polarization of the charge in the cloud to the left also allows the cloud on the...

Decades ago, I worked with a Navy veteran with experience in this area. He reported a story about a particular instance of using a Maritime pilot - and his mention suggested that this was typical. Of course, the Navy would not always opt for the services of a local pilot. The approach to the...

Okay. We'll make you captain.

No. The process is described in Science Insights. When sucrose is dissolved in water, I would expect each sucrose molecule to be surrounded by H20 molecules - almost like armor. When the water is boiled away, don't expect tiny, nicely formed cubes of sugar. The best you can hope for are...

Math statements are declaratory. For most programming languages, statement are imperative. Reliable programs are created when the requirements are well-captured, the code is comprehensively tested against those requirements, and the projects development procedures are well-established and followed.

... and risky ... While working on the helm system for the Ford, I was informed that the reliability of the steering system was most critical during underway replenishment operations. During that time, the aircraft carrier and the supply ship run parallel to each other, precisely matching...

Responding to the title (Thera are only finitely many primes): If there are a finite number of primes, then take the product of all of them and add 1. The number you have will be different than all primes and will not contain any of them as a factor. - reductio ad absurdum

Lacking a solid method of diagnosing Irlen syndrome, and lacking any hard study of the color-tint treatment, who knows! I find it plausible that some portion of those using the tinted glasses are finding a helpful effect that goes beyond that of a placebo. If the color-tinted glasses...

Taking the International Space Station as an example, at a distance from Earth of about 425 km, time would pass slightly faster than on the Earth's surface - about 3.3msec per year. But, since the ISS is in orbit, and is also affected by time dilation from speed, the net affect is about 14 msec...

I would suggest you start by checking out the work of Procrustes, who created a bed that was the perfect fit for anyone. * Don't set out a curriculum for yourself that you would hate. * Recognize that there is no single "Mathematician" target. The "very start" is no older than age 11 or 12. If...

I agree with the OP - it's not Physics. Should we move this to "General Discussions"? That said, how does "inverse" relate to "multiverse"?

A dream sequence could focus on what the protagonist is worried about - and incidentally introduce whatever story points you need to make. I remember a report of the modern analysis of many dreams from Ancient Egypt. The author's conclusion was that being misunderstood was the most prevalent...

Since the photo was taken in 1902, we know that panchromatic film was not used. So anything red on black or blue/violet on white will not be rendered. On the other hand, it is a very high grain film - perhaps higher than one would could get with most off-the-shelf color digital or film cameras...