Other Sciences

I found a handbag, made of faux leather, together with a plastic zipper bag inside, put somewhere dark and left behind for at least 4 years. They are still perfect. My home is shined with strong sunlight and my personal experience is that in a few months of exposure to sunlight, almost everything starts to go wrong, not to mention faux leather and plastic zipper bags. But they are perfect now. I start to wonder if sunlight is the primary cause of damaging most things, if not everything? if there is any damage to something put in dark for 100 years, when other conditions are normal, not particularly better or worse? Expecting any comment.

For a long time, it's said bluetooth could cause cancer which is something I don't believe because if that's the case, it should have risen concern by the general public. However, I hope this is not a stupid question. What if a bluetooth device is made very poorly for sake of reducing the cost, or if it is made by an unqualified someone or factory, would it increase the any health risk to the end user? Or that said, is level or amount of radiation emitted relate to the how well the bluetooth is made?

For several hundreds of years important statements in natural sciences were called "laws". But some time ago new "laws" stopped to appear, and the important statements now seem to be rather called "principles" and "equations." Is it so? If so, what was the last "law"?

Is it to act as an alarm trigger when data is breached? In this scenario no information is transmitted. The wavefunction acts as the trigger.

Potential truth behind aphantasia I propose that the development of aphantasia, characterized by the inability to form mental images, is influenced by one's early upbringing and experiences. I suggest that the absence of mental imagery is a result of specific factors during the formative years, such as the dominant sensory modality relied upon and individual cognitive tendencies. For instance, individuals who heavily rely on visual stimuli during their upbringing may be more inclined to engage in visual imagination. In contrast, those who heavily rely on auditory input may naturally lean towards an auditory-focused monologue. This preference or bias in m…

This question was brought about by a claim I saw on Twitter Another person lower in the thread says that Feynman tested 125 at 12. Which, from what I understand, doesn't mean you'd expect him to have a higher IQ as an adult. The tests supposedly adjust for age. Anyway, is this true? Did he really test 125 and at what age?

I am receiving offers for solar panels and various configurations, with and without batteries. To make a decision I need to have a clear reason, why would I go for it. What are the possible reasons?

is there a way to make some thing out of house hold stuff to make a absorbent powder

Is anyone else into Trail Cams? The idea of spying on wildlife is fascinating to me, watching their behavior when they don't know anyone is watching can be very interesting but there are also some trail cam photos that are... not sure the words I should use but they are are either weird beyond belief and portray unknown phenomena or are hoaxed in ways i would love to know how it was done. A lot like magic tricks, you know there has to be a catch but the trick is not evident at all. This one is pretty good, mostly just candid shots of wildlife. If I come across any of the weird ones that seem to need explanation I'll post them. There is one of a little girl in the w…

Please follow the link to view a table of element reactions. https://shipwr3ck.com/research/lib/ionic-or-polar-covalent/

Good day. My pomegranate tree is 2 year new, about 2m tall in a drained 20 litre bucket outdoors now. Shows pale portions on most of leaves. Anyone familiar with a cause ?

I have lots of these and they date back some 30-60 years.(so no washing instructions on them) Now I think I may have bed bugs or similar in my bed and so I want to clean the bedding. Easy enough with sheets but I am not sure about the woolen blankets as the (=my) rule with wool is to wash at a cold water temperature-and this may not be very effective for killing these bed bugs My suspicion is that it may be possible to go to a warmish temperature without damaging them but not the 90%that I am using on the sheets. I doubt this is a problem many here will have faced but I can't seem to find another discussion forum dealing with washing clot…

The British sewage network is one of the oldest still in service today, it designed for less heavy usage than today, but ultimately succumbing to the amount of rainwater washed into the system. Although this rainwater helps to naturally clean the system, there would be no possibility of discharge into natural water supplies, were the network designed to separate the two. Which countries have taken this route ?

Good day. What single crop could be cultivated to provide humanity an emergency substantial and reasonably balanced diet by itself, as if critical climate changes prevented variety of foods to be produced some day ? Some root, tuber, grain, legumes, leaves, beans... ?

So technology seems to stabilize after awhile where it won't advance much further and there are examples of that. First I will start out with an example of a technology that has more or less stabilized, the gun. The first guns were these big cannons from the 12th century. Then as they got more advanced they were able to shrink guns down to the size where they could be used and carried by a single person and we had matchlocks which were long guns that were fired by a burning wick that was lowered into the flash pan with a lever, setting the powder off. Then we had wheel locks which used friction wheels instead of matches that produced sparks which set off the powder.…

Greetings. Seen often that after dough is left to rise for a long time, is purposedly deflated and put again to a second rise. Why destroying the first rise ?

under the condition that they are not allowed to talk so that you don't know their accent. Is it possible to make a promising guess through their biological appearance i.e. not their dressing style and what would that be?

What's usually the major difference? Could cheap wine be made through less expensive processes or costs so that the wine is less beneficial or even more damaging to health? I understand that wine isn't generally considered to be good for health after all.

I’m not scientific so please excuse the dumbness but I’m sure one of you can easily put a firm stop to my wild theory. The pyramids seem almost impossible to build due to the weight of each block. It also amazes me how big dinosaurs were so has anyone considered that we could have possible had a lower gravity field which would’ve made it easier for pyramids to have been built and for larger animals to have existed??? Could a meteor hitting the earth have moved it off its original trajectory and made gravity stronger???? Please be gentle

Hey everyone, I just wanted to share how the world looks to some people. To help me, I will be using Octavio Ocampo's paintings. Basically, some people see faces in almost everything.

From time to time, I'm in a position of having to read studies or review articles from various fields to figure out what science says on a particular issue. One obstacle I encounter is not knowing how reputable the journal the paper was published in is, the reputation of a journal being a useful heuristic for a non-expert for having some sense of how credible the information is. Is there some way to determine this?

The title of this thread is a title of recent article (Photographer Nicolas Remy captures image of the rare spotted handfish | CNN). How would you read it: the photographed fish is rare, or a fish walking on its "hands" is rare?

I was informed that I was indeed correct, but I was late, there is already a law of the unity and conflict of opposites, that was created 150 years ago. (Thank you for letting me know, so I don't make the mistake of putting my life to research of a law that already exists.) Now I can research and come up with other theories about the universe we live in, and maybe the universes outside.

It has the dimension of force per area or the same dimension as that of pressure. It is called stress. It is a fraction which compares the change in the configuration of the body to the original configuration of the body. It is called Strain.

As noted in another current thread, hundred years ago science textbooks used to talk about "destruction of heat". This language is not used in science today. I think, there might be many other examples of interesting evolution of scientific English, not involving changes in underlying physics. The first came to my mind, "mass". Not long ago (but after 1905) it often was used with a qualifier, e.g., "rest mass", "relativistic mass". Today, it is just "mass" meaning "rest mass", in all (almost?) textbooks, presentations, papers. Other interesting examples?