Recent comments in /f/askscience
[deleted] OP t1_j2yd7x0 wrote
Reply to How does dish soap eliminate bacteria? by [deleted]
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fuckpudding t1_j2ycc4s wrote
Reply to How does dish soap eliminate bacteria? by [deleted]
The sponge is definitely carrying bacteria from dish one to dish two. But the soap + scrubbing is making the mechanical removal of food and bacteria much easier. Basically freeing it from adhesion to the surface of the dishes so that the final rinsing with water carries the bulk of it away and down the drain. I personally think sponges are gross and not good for cleaning things involved with eating. They harbor bacteria like it’s nobody’s business and you’re right to be questioning this. I’d recommend switching to a plastic bristled brush that you can fully rinse with before each dish or item that you wash.
SignalDifficult5061 t1_j2y8xax wrote
Reply to How many times mRNA transcript can be translated before it's degraded or something like that? by kappusha
It varies considerably for a number of reasons.
Transcript lifetime is generally regulated directly by degradation in a time dependent manner. There are regulated in many others ways as well including miRNAs, and probably at least half a dozen other things.
According to the below example the median half-life of a transcript was 7 hours, with a few mRNAs under an hour. This may be very different than for bacteria, or various cell types etc.
How many proteins are made per transcript before degradation is also liable to be very different for reasons like, for example, codon usage (rarer codons tend to have smaller tRNA pools) so it will take longer to translate and thus there will be fewer proteins, and any number of other things.
Database for mRNA half-life of 19 977 genes obtained by DNA microarray analysis of pluripotent and differentiating mouse embryonic stem cells
[deleted] t1_j2y8wh1 wrote
Reply to comment by SynbiosVyse in Can the human body clear a HPV infection copletely? by Terradubia
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[deleted] OP t1_j2y7ilo wrote
Reply to comment by rrussell1995 in How does dish soap eliminate bacteria? by [deleted]
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rrussell1995 t1_j2y76sg wrote
Reply to How does dish soap eliminate bacteria? by [deleted]
Soap contains emulsifiers which break down the membrane of bacterial cells. Emulsifiers are chemicals which allow oils (hydrophobic) and water (hydrophilic) to dissolve or mix in one another. They’re in everyday items such as ice cream paints etc.
pepinyourstep29 t1_j2y6f5i wrote
Reply to comment by paramedic-tim in Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science by AutoModerator
They're specific points in space, but the stable orbits around them are very large areas thousands of miles wide. Spacecraft can park in that orbit and maintain their position in space with very little fuel.
[deleted] OP t1_j2y5ito wrote
Reply to How does dish soap eliminate bacteria? by [deleted]
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pepinyourstep29 t1_j2y509d wrote
Reply to comment by PeanutSalsa in Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science by AutoModerator
The Trappist-1 system is the most likely candidate. We still don't know for sure though, we only have limited data on exoplanets.
[deleted] OP t1_j2y44kz wrote
Reply to How does dish soap eliminate bacteria? by [deleted]
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electric_ionland t1_j2y3f3w wrote
The groove is a V shape with 90 degree angle. Each side of the V encodes for a different channel. The result (depending on how they are configured) is that the up and down movement of the stylus give you the sum of both channels while the left to right movement give you the difference between them.
PeanutSalsa t1_j2y0iy3 wrote
Have there been any planets discovered that are as livable or more livable than earth for humans?
[deleted] t1_j2xxz0x wrote
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Alkaven t1_j2xxtr4 wrote
Reply to comment by Weed_O_Whirler in Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science by AutoModerator
Wow okay, thanks! I was totally confounding force and energy. The book example is really helpful.
lunakat6 t1_j2xvo8d wrote
Reply to comment by mfb- in Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science by AutoModerator
I think I only really need a lift on a shuttle. No need to waste earths resources/money on a probe or anything. Just open the doors and chuck me out. Or shoot me out like a torpedo.
mfb- t1_j2xueou wrote
Reply to comment by lunakat6 in Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science by AutoModerator
An expendable Falcon Heavy can do that on a direct route (no course corrections needed) for $150 million or so.
A partially reusable Falcon Heavy or even smaller rockets can do it with fly-by maneuvers, but then you need course corrections on the way to aim more precisely, which means you need some sort of active spacecraft. The launch gets cheaper but the spacecraft will cost something.
Antique-me1133 t1_j2xu4dk wrote
Reply to comment by Krail in Are there any examples of natural hybridization, or any possibilities of this occurring in nature? by Owlsthirdeye
Read the article, you will see that coywolf is an inaccurate name as virtually all coyotes are hybrids of coyote, wolf and dog.
paramedic-tim t1_j2xtbbh wrote
How big are the Lagrange points? Like, are the solutions to the equations a small point in space, or are they a large area? How big is the space at the Lagrange points that are usable for satellites, etc?
Weed_O_Whirler t1_j2xrwxj wrote
Reply to comment by Alkaven in Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science by AutoModerator
It doesn't take energy to apply a force. Think of a book sitting on a table. Gravity is pulling the book down (aka, a force pulling down) and the table is pushing up on the book (aka, a force pushing up). And it can just sit there forever. Obviously the table doesn't need energy to do that.
No different than the Sun keeping the Earth in orbit. The energy of the Earth/Sun system stays constant (assuming nothing else in the universe). The force the Sun is providing on the Earth isn't changing its kinetic energy (since kinetic energy only depends on the speed of the object, not its velocity), so conservation of energy doesn't get violated here.
mfb- t1_j2xqps2 wrote
Reply to comment by headlessplatter in Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science by AutoModerator
The Moon is about as reflective as asphalt, but various missions have left retroreflectors at their landing sites which are routinely targeted with lasers. They can measure the distance with a precision of a centimeter or so, depending on the experiment and targeted retroreflector.
Jupiter, Venus, Mars and Saturn and sometimes even larger asteroids need to be considered in these experiments, see e.g. this publication for a discussion. It's an extremely precise test of our understanding of gravity and the Solar System. Unfortunately it doesn't test MOND directly because a small acceleration from one specific object isn't enough (otherwise you could just say Earth is a billion objects providing a small acceleration each), you need a small acceleration overall. The Moon is not in such a place.
Alkaven t1_j2xnbi6 wrote
My understanding of orbits is that if every particle in the universe vanished except the Earth and the Sun, the Earth would continue in its orbit, because it is in free-fall around the Sun.
My understanding of conservation of energy makes me think that this is impossible. I was told in HS physics that the Earth is constantly accelerating--not because it gets faster and faster, but because it's changing directions by going in a circle ellipse instead of a straight line. F=ma, so it takes force to change the direction. That force is provided by gravity... but here I get confused. Can gravity just provide this force forever? Does that not mean that it's generating energy (from nowhere)?
I'm ten years out of high school so I can't just raise my hand and ask the teacher :( I suspect that I knew the answer to my question at some point and have since forgotten it.
My Google searches somehow turn up all sorts of sources debunking flat earth theory, which is not what I'm trying to do here lol.
LazyRider32 t1_j2xlqvu wrote
They are also used in cancer therapy. Often, but I believe not necessarily, in combination with other immunotherapy, such as cancer vaccines. Useful links: https://www.cancer.gov/about-cancer/treatment/types/immunotherapy/immune-system-modulators https://www.frontiersin.org/articles/10.3389/fchem.2020.00601/full
kilotesla t1_j2xlq9l wrote
Reply to comment by hmartin430 in How close does one need to bring two coloured lights together to perceive a compound colour effect? by romxza
>low amplitude is only gonna excite the rods? High amplitude will allow the excitation of cones and at that point frequency will determine which cones are excited?
Yes, and yes, if that helps. Of course, the rods' response is not independent of frequency, but since there's only one type, you have no way to distinguish colors using them.
headlessplatter t1_j2xjr94 wrote
Reply to comment by lunakat6 in Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science by AutoModerator
According to NASA (https://voyager.jpl.nasa.gov/frequently-asked-questions/fact-sheet/), the cost to sent Voyager 1 and 2 out of our Solar System was about $865M--an amount I could not afford, but still comfortably within the reach of certain individuals.
[deleted] OP t1_j2ydaey wrote
Reply to comment by fuckpudding in How does dish soap eliminate bacteria? by [deleted]
Thanks for the answer, I’ll definitely be looking in to finding an alternative.