What part of sunlight causes algae to grow?
I’ve been trying different searches but everything I find just says “sunlight”. Since sunlight consists of multiple parts such as UV, Infrared and the normal visible spectrum, I’m curious which part is actually responsible for photosynthesis to occur? On that note, depending on what part of the light, would it still grow...
Why are so many galaxies symmetrical?
On their massive scale you’d think that several would have opposing arms different lengths due to the way suns and solar systems end up forming. Most of the imagery I see shows almost all galaxies symmetrical. Just curious.
Does having fur help or hinder animals like otters/beavers/polar bears when they swim about?
Does sociology extend to other social animals besides humans?
If sociology's exclusive to humans, then what might be the field of other social animal research?
How much longer will the age of Science last?
I’m curious what your take is on the finite nature of Science. I imagine the fractal “edge” will always remain illusive, but when do we hit 98% or 99.999% documented confirmed, distilled, and well explained? (Centuries? Millennia?) When does it become an engineering corpus?...
Can placebo effect really help you heal faster and cure physical illness ? If so won't someone who works out too little but believes in himself too much get jacked beyond comprehension ?
What are the limits to it ? Exceptions etc. Context i saw vsauces " power of suggestions " video. Is the video scripted or was the kids conditions just not real like i can understand the girls condition may be cured through placebo but come on adhd and migraines immediatly cured ?
Would wearing a covid-style facemask while cooking significantly reduce the harmful effects of gas stoves?
Also, would it matter if it was the plain-style mask or n95?
Spring Potential Energy
Say a dissolvable spring is compressed with a bolt and nut that do not melt in a sulfuric acid solution. The spring has quite a bit of potential energy at this point since it is compressed. Assuming the spring dissolves perfectly (no breakage, just complete disintegration), what happens to the potential energy of the spring?
Do we have any estimates as to how long it takes for a species of bacteria to go technically extinct entirely via genetic drift?
So, let’s say there’s a species of bacteria that is known to dwell in Greek yogurt. How long would it take before that species of yogurt-dweller only has modern descendants different enough to qualify as one or more new species?
Is the "Tromatz" bioelectric wave toothbrush legit, or snake oil?
I discovered the “Tromatz” bioelectric wave toothbrush, and it sounds too good to be true, which usually means… it is. However, they do link to some journal articles, so it seems it’s somewhat based on fact. There’s very, very little else out there aside from their own website that I can find. Thoughts from anyone...
How young are the youngest fossils?
And how old are the oldest bones?
Given a writing speed of one logical symbol per planck time, would the amount of time it takes to write Rayo's Number exceed Rayo's Number?
Why are we so concerned with oxygen production yet we never hear about nitrogen production, though we actually need 78% nitrogen vs 21% oxygen to survive?
Excess oxygen is actually harmful to humans, but all the climate warnings are about losing oxygen, not nitrogen edit: but when we look for habitable planets, our focus is ‘oxygen rich atmosphere’, not ‘nitrogen rich’, and in medical settings, we’re always concerned about low oxygen, not nitrogen....
Why were dinosaurs huge?
I mean, why evolution selected dinosaurs to become that huge?
what is the mass of a cloud?
As the title asks, what is the average mass of each kind of cloud? Ignoring things like overcast days, and only considering clouds large enough to identify. Or maybe rather than “average” it’d be better to say “what is the mass of an archiypical cloud of each type?” Eg an archiypical cumulus, cirrus, cumulonimbus, etc.
Could the fabric of space be the origin of baryon matter?
I’ve been doing a bit of searching for theories on the origin of baryon matter (including antimatter of course) and some seem to hint at quantum particles spawning from the fabric of space (but doesn’t seem to theorize on how this happened) but not many focus on hypothesizing how all forms of baryon matter ether: was the...
How do some animals (or at least humans) manage to generate more force than their own muscles are rated to handle?
Just as an example, there were evidently reports during the 2007 Glasgow airport attack that someone attempting to subdue the assailant and assist police kicked said attacker in the testicles… but somehow managed to do so hard enough to injure one of their own foot tendons.
Do we know of a means by which artificial nuclear fusion could be used to mimic stellar carbon-12 production?
What is the lowest temperature of plasma ever achieved?
Can it freeze water?
Is the air in a closed container at 100% relative humidity?
Imagine a sealed container filled with any amount of liquid water at any constant temperature and pressure where water can be liquid. Is the air in the container necessarily at 100% relative humidity?
Can someone give me a semi-layperson explanation of emission spectra?
There’s supposedly a variety of different spectroscopy methods but what drives the choice of one method over another? If elements drive the colors, how do you parse out individual elements from a compound?...
Can sufficiently energetic EM waves of a specific frequency affect weaker EM waves of a different frequency?
My initial thought is “no,” since our eyes, being receivers for specific wavelengths of EM radiation, can’t see frequencies like infrared, no matter how bright. Likewise, my cell phone’s WiFi and cell modules don’t conflict with each other (as far as this layperson can tell, anyway)....
What is known about Persistence of Vision in various animals?
I’m curious about building cat toys that are impractically over complicated with Arduino/Maker stuff. Thus the casual curiosity about persistence of vision. I wonder if other animals have something like a different internal clock frequency where the image only forms at higher (or lower) frequencies than most humans.
What causes fish tank water to react to UV(A?)
I bought a torch that has a 365nm UV light, which I believe is UV-A?...