Recent comments in /f/askscience
[deleted] t1_j4ulewe wrote
[deleted] t1_j4ul9kx wrote
Reply to comment by [deleted] in Extinction of the Dinosaurs: What did I miss? by cakedayCountdown
[removed]
boostchicken t1_j4ul12t wrote
Certainly breeding choices come into play here. There is nothing preventing a female from having denser bones, bigger muscles, and a nice moustache. Testosterone does its thing. On the flip side of that coin if a Male has excess Estrogen they will lose muscle mass, bone density, start to develop breasts, grow wider hips and be prone to melancholy where as testostorone drives "rage" (unless countered by serotonin).
Also, I could be wrong about this. Women who go through menopause generally have "rage" do to the steady testosterone levels with depleting estrogen.
WeaponizedKissing t1_j4ukxh8 wrote
Reply to comment by origami_alligator in What happens to the energy of sound in space? by full_hammer
If a tuning fork is dinged in space, but there's no atmosphere to hear it in, does it make a sound?
The fork will continue to vibrate. But there's no "sound". It's just a wobbly fork. No matter how close you hold it to your ear, you won't hear anything.
[deleted] t1_j4ukt8a wrote
Reply to comment by Hodensohn in Biologically speaking, what makes men typically stronger than women? by Erratic_Noman
[removed]
[deleted] t1_j4ukkme wrote
Reply to comment by kalysti in Biologically speaking, what makes men typically stronger than women? by Erratic_Noman
[removed]
[deleted] t1_j4ukdk8 wrote
Reply to comment by Hodensohn in Biologically speaking, what makes men typically stronger than women? by Erratic_Noman
[deleted]
[deleted] t1_j4uk8tb wrote
Reply to comment by Jai84 in What happens to the energy of sound in space? by full_hammer
[removed]
Jarlentium t1_j4uk8n8 wrote
Reply to comment by Jai84 in What happens to the energy of sound in space? by full_hammer
Yeah decompression is what will kill you not freezing
And spacecraft don't have freezing issues, they have overheating issues because there's no medium to transfer heat out of the ship
appame t1_j4uk5fp wrote
Men tend to have larger muscles, heart and lungs than women of the same height giving them more physical power. Men's bones will be denser and longer giving them better leverages. Men's circulatory system will be more robust with thicker veins and arteries giving them better energy delivery.
To grossly simplify, this is caused by exposure to testosterone during development, with men receiving much more testosterone than women.
[deleted] t1_j4uk2ja wrote
[removed]
Relevant_Lychee_8428 t1_j4uk0l3 wrote
Sound cannot travel through a vacuum, such as the empty space between stars and planets, because there is no medium to carry the sound waves.
This means that if you were to yell in space, your voice would not travel and the energy you expended to make the sound would not be transferred as sound waves.
It will not transfer anywhere, it will remain in your mouth.
soul1001 t1_j4ujofk wrote
Reply to comment by Butterfly-greytrain in What happens to the energy of sound in space? by full_hammer
Exactly. Astronauts will put their helmets together if they want to talk and can’t get a radio signal through (the helmets touching gives them something for the sound to travel through)
vox_mechanika t1_j4uj4dj wrote
Reply to comment by 10113r114m4 in What happens to the energy of sound in space? by full_hammer
Wouldn't you just end up with an extremely satisfied tuning fork... and a sticky mess??
[deleted] t1_j4uiz51 wrote
Reply to Is it better to have warm or cool air for an external combustion engine? by Past-Loquat-4184
[removed]
KmartQuality t1_j4uirvb wrote
Reply to comment by TheJasonKientz in What happens to the energy of sound in space? by full_hammer
There is sound in the tuning fork. You just have to put your ear drum directly on it.
[deleted] t1_j4ui2zi wrote
[removed]
Jai84 t1_j4uhxzz wrote
Reply to comment by gab_r95 in What happens to the energy of sound in space? by full_hammer
Also, (I see people going back and forth on this a lot, but here’s my understanding….) you wouldn’t freeze super fast like you see in movies. There might be ice forming on your skin, but in general there’s not really any matter (there’s an infinitesimal amount even in the “vacuum of space”) for your body to interact with, so the only heat your body is loosing is from slow radiation. I’m assuming you’re also gassing off water vapor and other things into the vacuum from your skin, eyes, mouth, lungs, etc. which would cause a loss in temperature locally I think? I haven’t done a lot of research in this, but I think the general understanding is you’d take awhile to actually “freeze up”. You’d be dead and floating around and looking stiff because there’s minimal forces acting on your limbs etc., which could give the impression you’re frozen.
Butterfly-greytrain t1_j4uhwtk wrote
Reply to comment by TheJasonKientz in What happens to the energy of sound in space? by full_hammer
So basically, there’s no sound in space? To take OP’s example, if I yelled, would I hear nothing?
[deleted] t1_j4uhsuf wrote
gramoun-kal t1_j4uhoyz wrote
When something vibrates, in air or in vacuum, the flexing of the molecular structure itself robs energy away from the movement and turns it into internal heat. So anything that vibrates will eventually come to a rest (ang get slightly warmer) even in a vacuum.
In air, the vibration is slowed down slightly faster with energy from the movement being robbed by air molecules and it becomes sound waves.
So, unsurprisingly, vibrating stuff will lose its energy faster in air than in vacuum.
To answer your question, the energy that would have gone into the sound remains in the vibrating material and goes to keeping it vibrating a little longer.
Hodensohn t1_j4uhoki wrote
Reply to comment by sheismagic4e in Biologically speaking, what makes men typically stronger than women? by Erratic_Noman
great but common missunderstanding of evolution. men "are" not "designed" by or with the purpose for anything (that would be creationism). over the years stronger men survived and gave their genes to the next generation, same with women that where light and able to flee. those advantages survived the next generations and so on. when more and more society evolved, beauty ideals and preached roles where having an impact on evolution as well.
[deleted] t1_j4uhluf wrote
[removed]
Blakut t1_j4ugwil wrote
Reply to comment by KettleManCU7 in How does lightning illuminate the sky? by AverageMan282
>. The light emitted from the bolt can be reflected off of clouds and other particles in the atmosphere, which can enhance the overall brightness and create different colors in the sky.
iusn't that what op said? And without tge atmosphere and clouds and such you'd only see the bolt?
Just_Berti t1_j4ullp3 wrote
Reply to comment by TheJasonKientz in What happens to the energy of sound in space? by full_hammer
if kinetic energy "will dissipate as heat" what will the heat dissipate into when there are no particles that could receive energy and get heated?