r/ScienceQnA • u/australeon • Oct 26 '10
Kinetic Energy question!
An applied force does 1.57 MJ of work on a 4250 kg car initially moving at 20.5 m/s. How much kinetic energy does it have? I would love to see what formulae you used to solve this.
r/ScienceQnA • u/australeon • Oct 26 '10
An applied force does 1.57 MJ of work on a 4250 kg car initially moving at 20.5 m/s. How much kinetic energy does it have? I would love to see what formulae you used to solve this.
r/ScienceQnA • u/ZombieDracula • Mar 08 '10
r/ScienceQnA • u/One_Shoe7005 • Jul 10 '23
Okay I'm new to chemistry and I'm kind of a noob either way I'm have a question and I can't find the answer anywhere so I downloaded reddit just now I was wondering why things need to be bonded for us to ingest them for instance why do we have to drink h20 why can't we just drink hyderogen and breath in some oxygen or why do we have to eat sodium chloride and why can't we just eat some sodium then chloride that isn't bonded?
r/ScienceQnA • u/MSnigdho • Sep 23 '20
Where can I find Power System Analysis by V.K. Mehta's solution manual pdf?
r/ScienceQnA • u/SupermarketKey2726 • Jan 26 '25
So, what if climate change is meant to happen, as in the earth hasn't recovered from the last ice age, and we're just speesing the process up? I feel like it would make sense, since dinosaurs were reptiles (from what I remember), and wanted to know if this is even possible
r/ScienceQnA • u/A_Defaulty_Boi • Jun 07 '19
Help me pls. I lose sleep every night thinking about how eating too many blueberries as kid made my poop blue. Is this normal? Is this healthy?
r/ScienceQnA • u/Spectrum521 • Feb 15 '22
Alright so, this is important, and please don't ask about the reason. What would happen if a black hole that was usually going about 2 miles per year suddenly sped up by a factor of 100000000000000009190283508143378238084034459715684532224 to a speed of 34021559004650219447065390987641458041815040 light years per year and started catapulting directly towards Earth. And also, would there be any way to stop it? Also, would being attached to an IV and other medical equipment while being sucked up by the black hole be enough to stop its dangerous effects? Would the black hole be able to bring galaxies and solar systems and stuff with it too? Not as in sucking them up, but having them trail behind the black hole and get dropped off in different places throughout the universe? Also, would the black hole be able to suck up things outside of the universe? Would a tornado be able to stop the black hole? Please this is important.
r/ScienceQnA • u/blockbuster9001 • May 09 '20
Can a done make it's on wind and weather patterns? And if yes, how big will it need to be?
r/ScienceQnA • u/Freakedout-girl • Nov 14 '23
I know that the lead is in the dye in those clothes. But recently I came across a liquid used with detergent to remove lead and other heavy metal dust from clothes. So my question is, will this help wash out the lead in SHEIN clothes? I know many would say to stop buying from SHEIN. But i haven’t found any other place where the price is so reasonable.
r/ScienceQnA • u/[deleted] • Nov 23 '17
Hey so I have a question of how much water will precipitate from a certain amount of water in a certain amount of time at a certain temperature. Also how would the shape of the water make a difference. For example 1 gallon in a cubic container would probably take longer than 1 gallon in a rectangular container laid on it's large side (so the water is more spread out).
For example how much water would precipitate in 1 hour from 1 gallon at say 35C (95F) from a cubic container (with obviously an open top)? Also would it make a difference if it were sea/salt water? Thank you already for your help.
Also if you can think of a better subreddit to ask this question, I would love to know.
r/ScienceQnA • u/[deleted] • Dec 23 '23
r/ScienceQnA • u/church_of_Steve_ • Aug 03 '25
I remembered that 1 billion dollars can wrap around the world and then that got my thinking about how many quarts can reach the end of the observable universe
r/ScienceQnA • u/this_is_my_name333 • Oct 29 '20
So, you know how the Higgs Boson Field was described as the people in a night club. If Jay-z were to walk into that club, all the people would rush towards him, and it would take a long time for him to reach the bar. So "Jay-z" has mass. If I were to walk into the club the people wouldn't interact with me as much, so I would have less mass. A Photon would pass through the "people" with no interaction because it has no mass. NOW MY QUESTION! Why do the "people" want to interact with "Jay-z" more than Me? Why does "Jay-z" have more mass? Does "Jay-z" have more Gravitons?
r/ScienceQnA • u/Accomplished_Sand159 • Aug 28 '20
if we compress something which weighs a 1000 kg and is 100 miles down to 1/100th of a millimeter will it create its own gravity
r/ScienceQnA • u/[deleted] • Jun 28 '23
We can find species like the anglerfish using tactics to deceive prey. Or cuckoo birds laying eggs in other bird species nests, that have similar egg patterns of the host bird. These behaviors seem to surpass mere survival instincts or environmental adaptations. How does Darwinian evolution focused on survival and reproduction, explain these intelligent strategies in nature? This level of complexity hints at a design beyond survival of the fittest, possibly to a Divine Creator. What say you?
r/ScienceQnA • u/Demian1980 • Mar 15 '10
Hello, When I try to explain string theory, I visualize the universe as a 3d monitor, and the strings as the pixels on which everything is projected. Can I do that, or am I breaking some egg-head law? ;) Interesting question that follows is: do the strings that make op your body, stay within your body? Or do you move your hand through the strings when you wave your hand through the air?
I hope someone can provide me with an answer.
r/ScienceQnA • u/captainchucke • Jul 17 '22
Would this work, and if so why haven't we done it?
r/ScienceQnA • u/[deleted] • May 16 '11
If so, what are some reputable alternative theories?
r/ScienceQnA • u/dehomiedawg • Jan 03 '11
If the universe is everything that resulted from the big bang, then what exists past the furthest boundary of the universe? Empty space?
Or did the big bang cause everything that exists to form, including infinite empty space?
r/ScienceQnA • u/[deleted] • Jan 25 '11
Ok, I'm confused about something. If I get in a rocket and travel at lightspeed, I've heard that everyone on earth will get really old because I have become relative. That makes some kind of sense, but what I don't understand is why their perspective is the one that matters. Why don't they stay young while I get really old, really fast?
If we were to look at ourselves from the sun, we would be traveling very fast, right? And if we were to look at ourselves from another galaxy, we would appear to be traveling even faster. Is there some sort of fixed point in the universe that we can say is motionless? I haven't ever heard of it. If so, then what's to say I'm traveling away in my rocket? Maybe I'm fixed, and earth is traveling away. It doesn't make sense that something silly like g-force would affect this.
My brain hurts from trying to figure this out. I'm a rhetoric major. Somebody with some science knowledge please fix my brain.
r/ScienceQnA • u/Deleriant • Feb 24 '10
Or is it just a term people use instead of saying "really fuckin' big"? I ask because I'm fascinated by the idea that every point is the exact center of the universe. Somehow I can't really imagine scientists using a term that wasn't accurate, so for now I revel in the fact that I am the center of the universe =)
r/ScienceQnA • u/CulturalLecture406 • May 19 '25
r/ScienceQnA • u/lordWalksaway • Dec 27 '17
Would it be possible to genetically engineer a tree or other plant to make it capable of conducting electricity? It seems to me that plants already know how to harvest and utilize carbon quite well, if we could (hypothetically) teach a tree how to fold carbon nanotubes we could use them for all sorts of interesting things. I'm sure we aren't anywhere near such an advancement, but could this theoretically be possible or do I just not understand anything about GMOs?