Recent comments in /f/askscience

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.

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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.

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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.

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Jai84 t1_j4uhxzz wrote

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.

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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.

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Hodensohn t1_j4uhoki wrote

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.

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Blakut t1_j4ugwil wrote

>. 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?

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