q_id stringlengths 5 6 | title stringlengths 10 300 | selftext stringlengths 0 10.9k | document stringclasses 1 value | subreddit stringclasses 1 value | answers sequence | title_urls sequence | selftext_urls sequence | answers_urls sequence | title_body stringlengths 17 10.9k | embeddings sequence |
|---|---|---|---|---|---|---|---|---|---|---|
2t5hks | Does the spin of the earth have any significant effect on the time it takes to complete a trans-pacific flight vs a trans-atlantic flight? | The Earth spins west towards the east. This [GIF](_URL_0_) helps visualize it.
Assume that its the same model of plane, travelling at the same altitude and speed, with the same mass, same weather conditions, same distance
Its ~7500 km from Toronto to Moscow, and Vancouver to Tokyo (google).
Would the rotation of the Earth make the flight from Vancouver to Tokyo any faster?
On a side note, are flight routes generally flown perpendicular to the axis of the Earth? | askscience | {
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"Nope, the plane is in the rotating reference frame.\nBut, it actually does because the coriolis force contributes to atmospheric winds, among them the jet stream which runs in one direction only ... | {
"url": []
} | {
"url": [
"http://en.wikipedia.org/wiki/Earth%27s_rotation#mediaviewer/File:Globespin.gif"
]
} | {
"url": [
"http://en.wikipedia.org/wiki/Hafele%E2%80%93Keating_experiment"
]
} | Does the spin of the earth have any significant effect on the time it takes to complete a trans-pacific flight vs a trans-atlantic flight?
The Earth spins west towards the east. This [GIF](_URL_0_) helps visualize it. Assume that its the same model of plane, travelling at the same altitude and speed, with the same mass, same weather conditions, same distance Its ~7500 km from Toronto to Moscow, and Vancouver to Tokyo (google). Would the rotation of the Earth make the flight from Vancouver to Tokyo any faster? On a side note, are flight routes generally flown perpendicular to the axis of the Earth? | [
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5u4tlp | What would the evolutionary benefits be for male mammals' testicles being located in such a vulnerable location instead of being inside the body? | Being such an important organ (perhaps most important, considering an animal's ultimate goal in life is reproduction) what would/could be the reasons why mammals have not evolved in parallel to have testicles located in a much safer location inside the body rather than exposed in the way they are? I just noticed the obvious vulnerability of the organs as I am watching the AKC dog show right now, and every male dog has incredibly vulnerable jewels. Thanks! | askscience | {
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"Spermatazoa are sensitive to heat, and body temperature causes the testicles to produce defective sperm. Therefore the testicles have a very tightly controlled temperature. When warm, the testicles hang away from the body all... | {
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} | {
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} | What would the evolutionary benefits be for male mammals' testicles being located in such a vulnerable location instead of being inside the body?
Being such an important organ (perhaps most important, considering an animal's ultimate goal in life is reproduction) what would/could be the reasons why mammals have not evolved in parallel to have testicles located in a much safer location inside the body rather than exposed in the way they are? I just noticed the obvious vulnerability of the organs as I am watching the AKC dog show right now, and every male dog has incredibly vulnerable jewels. Thanks! | [
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1jkcy3 | Why do resistor values need to be color-coded, unlike capacitors wherein the capacitance is already printed on it? | Wouldn't it be much more easier if the values are already printed on the resistor itself? | askscience | {
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"text": [
"Well, they are for surface mount resistors: _URL_0_\n\nFrom [wikipedia](_UR... | {
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} | {
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} | {
"url": [
"http://www.mouser.com/images/vishay/images/CRCW-1.jpg",
"http://en.wikipedia.org/wiki/Resistor_color_code",
"http://www.resistorguide.com/resistor-smd-code/",
"http://www.expo21xx.com/automation21xx/345_st3_scara-robot/2.jpg",
"http://www.tpub.com/neets/book2/32VS0004.GIF",
"https:... | Why do resistor values need to be color-coded, unlike capacitors wherein the capacitance is already printed on it?
Wouldn't it be much more easier if the values are already printed on the resistor itself? | [
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23e3el | Spacetime can be streched and bend. But can it vibrate? If so, does it has resonance frequency? | askscience | {
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"> Can it vibrate?\n\nVibrations of spacetime are called gravitational waves. They have been detected indirectly by observing the orbits of binary neutron stars: The orbits lose energy as the stars emit the waves. \n\nThere is no resonan... | {
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} | {
"url": [
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} | Spacetime can be streched and bend. But can it vibrate? If so, does it has resonance frequency?
| [
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wfv4a | Is their a psychological or physical benefit to tennis players who "moan", "groan" or scream every time they hit the ball? | I was visiting my grandma the other day. While watching tennis I noted how some players "moan","groan", or scream with every hit they give. It annoyed me terribly so I asked my grandma (who watches a lot of tennis) why they do it and she couldn't give me answer. She did, however, note that it only started a couple of years ago with Venus Williams - though she may be wrong since she is over 80 years old.
So if tennis players didn't always do it, why do they do it now? Did someone realise they can hit the ball harder or more accurately? Is it a scare tactic to use against other players?
Thanks in advance!
Edit: Seems like the word I was looking for is "grunting". Thanks for the great answers.
Edit 2: Just realised I used the wrong "there". I wish I could change the title now...
| askscience | {
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"Comming from a martial arts background where we scream at the end of some of our techniques, here's why we do it:\n\n1) Psychological - anything that distracts or disrupts the other person's concentration is a... | {
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} | {
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} | {
"url": [
"http://www.livescience.com/10772-unnh-grunting-tennis-players-edge.html",
"http://www.amsciepub.com/doi/abs/10.2466/pms.1999.89.1.233"
]
} | Is their a psychological or physical benefit to tennis players who "moan", "groan" or scream every time they hit the ball?
I was visiting my grandma the other day. While watching tennis I noted how some players "moan","groan", or scream with every hit they give. It annoyed me terribly so I asked my grandma (who watches a lot of tennis) why they do it and she couldn't give me answer. She did, however, note that it only started a couple of years ago with Venus Williams - though she may be wrong since she is over 80 years old. So if tennis players didn't always do it, why do they do it now? Did someone realise they can hit the ball harder or more accurately? Is it a scare tactic to use against other players? Thanks in advance! Edit: Seems like the word I was looking for is "grunting". Thanks for the great answers. Edit 2: Just realised I used the wrong "there". I wish I could change the title now... | [
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6rvfui | Because of the curvature of the Earth, are nearby skyscrapers closer together at the base than they are at the top? | askscience | {
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"Yes.\n\nIf the two 100-floor buildings are one NYC block apart, which is 0.05 mile or 1/500000 of Earth's circumference, their 100th floors, which are .2 mile higher than their first floors, are going to be 2 * .2 mi * pi / 500000 further a... | {
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"url": [
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"http://mathscinotes.com/2017/01/effect-of-earths-curvature-on-suspension-bridge-dimensions/"
]
} | Because of the curvature of the Earth, are nearby skyscrapers closer together at the base than they are at the top?
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582vaf | Has it been scientifically proven that Nuclear Fusion is actually a possibility and not a 'golden egg goose chase'? | Whelp... I went popped out after posting this... looks like I got some reading to do thank you all for all your replies! | askscience | {
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"url": [
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"https://youtu.be/nWjAJKPLMEo",
"https://www.amazon.com/Plasma-Physics-Fusion-Jeffrey-Freidberg/dp/0521733170",
"http://klotza.blogspot.com/2016/08/whats-deal-with-fusion-power... | Has it been scientifically proven that Nuclear Fusion is actually a possibility and not a 'golden egg goose chase'?
Whelp... I went popped out after posting this... looks like I got some reading to do thank you all for all your replies! | [
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192wsu | Can blue whales have heart attacks or are their arteries just too big to clog up? | askscience | {
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"url": [
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"http://www.vliz.be/imisdocs/publications/235247.pdf",
"h... | Can blue whales have heart attacks or are their arteries just too big to clog up?
| [
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21pt1j | How far along in the digestive process can something still be regurgitated? | askscience | {"a_id":["cgfgstl","cgfgqzr","cgflzfr","cgft4p2"],"text":["It's not normal by any means, but it's en(...TRUNCATED) | {
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} | {"url":["http://en.wikipedia.org/wiki/Horse#Digestion","http://en.wikipedia.org/wiki/Fecal_vomiting#(...TRUNCATED) | How far along in the digestive process can something still be regurgitated?
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4n5usy | Can the completion of a circuit be used to communicate instantaneously? (Faster than light) | "I'm currently taking physics 20 so I'm really inexperienced with this stuff, so I need someone who (...TRUNCATED) | askscience | {"a_id":["d414ktq","d41c4d4","d415wqz","d416frk","d4237o1"],"text":["No. Changes in the electric fie(...TRUNCATED) | {
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} | {
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} | {
"url": []
} | "Can the completion of a circuit be used to communicate instantaneously? (Faster than light)\nI'm cu(...TRUNCATED) | [-0.19369374215602875,-0.6322546601295471,0.5123969316482544,-0.07573665678501129,-0.750693321228027(...TRUNCATED) |
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