Special Guest Derek Muller stumps Hank with logic problems and talks about energy, teaching tools and education through video. Jessi from Animal Wonders ...
+Professor Syndicate (Frank Lai) It's hard to say because Gravity is the attraction between all things with mass. It is felt less with distance but gravitational bonds are unbreakable, as far as we know.
The bonds don't contain energy, the molecule is in a high energy state. It has chemical potential energy like a ball on top of a hill has gravitational potential energy. With applied energy the molecule breaks forms several low energy molecules (breaking then forming more efficient bonds) and the ball rolls down the hill, both now being at lower potential states. The energy comes not from the bonds breaking but the formation of new low energy bonds. Hope that helped (sorry I suck at explanations)
Derrick you need to make a proper video about energy & bonds because that
was very informative. Hank, you were missing the lesson. It's ok not to
know something. That's when learning happens!
Ok. Feel free to respond and tell me what you think about this, but here is
what I thought about while watching the video.
We say that energy is "in" the glucose bonds because there glucose bonds
are higher energy than the bonds between those carbons and the oxygen in
the CO2 produced at the end of cellular respiration, right? Cellular
Respiration releases energy because of the difference in energy.
Derek doesn't like that idea, but I thought of a physics situation that is
similar. Think of how we describe graviational potential energy. We often
say that an object "has" gravitational potential energy, but when we
calculate that energy we do it by a comparison to another position where
the potential energy would be different. In that way, potential energy is
always relative.
Finally, Kinetic energy is the same. Velocity is a relative term, something
can only have velocity relative to something else. Therefore, kinetic
energy is also a relative measurement. Therefore, I have to wonder. Why
critique the biologist's description of bond energy relative to the
produces of a reaction if the physicist often performs calculations that
are equally relative. In fact, isn't all energy relative?
+Daryl Phuah yeah. That is true, but it seems like an issue with all types of energy not just chemical bond energy. I know that there are absolute measures of energy out there, but we're more likely to use the relative ones (calculating gravitational potential energy relative to earth's surface is more common than doing it relative to earth's center).
+Joshua LaForge Because it makes people think that the bond itself contains energy in absolute terms not in relative terms.
Human-Powered Helicopters and a Red Fox: SciShow Talk Show #8
Da Vinci imagined a helicopter powered solely by human muscles. Now more than 500 years later, two teams are using advanced materials to try and make that ...
+Lisa Melissa Even animals that grew in captivity are still very unpredictable. If they pet an animal without the consent of the handler, things can go bad in a second. These animals are in a complete unfamiliar place with different smells and noises that can get them kinda wary, so for safety better not to pet wild animals. I'm pretty sure the handler will tell whenever is a good idea to pet a specific animal. :)
Good video but If you could hold that thing for 10 secs the wire would be
burning through your fingers.
To the viewers: Not a good idea to try at home but It's a good idea to wear
safety glasses if you try experiments like this with batteries and sharp
objects, with adult supervision. It looks like the contact sparks were
edited out.
dude, not two weeks ago I tried to light my smoke with this exact principle using four C cell batteries. Failed with copper until I put a single staple in the circuit. Batteries are not as dangerous as people think.
Be my guest and get back to me when you short out a D cell battery with a wire. Until then I suggest you reserve your opinion regarding your evaluations of the level of intellect of other commenters. If you believe these "geek" videos are all based on fact, you are likely the fool and the target audience.
+John Baxter That little battery isnt going to produce a visible spark unless your in the dark. Furthermore, thats way too much copper for any considerable heat to be generated. Battery will be spitting and sputtering before any change happens with the copper. Your either a high school science teacher or a dumb shit 14 year old.
+maxybaer123 Probably, but it would break when you tried drilling something because the magnet is not fixed to the battery and would disconnect pretty fast. Also, it would get really hot.
I was taught that current flows from negative to positive when you complete
a circuit with a battery. Does your video make a mistake at 2:18 by stating
that current is flowing from positive to negative or is there something
about this particular experiment that is truly making current flow from
positive to negative?
+JonPoncho As Tim said, by the definition of a positive voltage established from the invention of batteries and the discovery of electricity which was long before the discovery of the electron in the 1890's, the direction of "Conventional" current flow is from positive to negative. The direction of electron current flow is from negative to positive. An electron is a negatively charged particle so if electrons flow through a resistor and you measure the voltage across that resistor. the "in" terminal will be negative and the "out" terminal will be a positive voltage by definition of voltage. If you connect an ammeter in series with a resistor and connect it across a battery, the ammeter will show a positive current from + to -. As Tim mentioned, you don't need electrons to induce current flow. Current flow is basically a transfer of energy between atoms and not of electrons or other charged particles actually shooting through a conductor or other medium. The speed of the electricity is the speed of light (more or less) but the velocity of the charged particles or ions transferring form one atom to the next is actually much lower and called the drift velocity. Current flow direction is always confusing to early students in physics or electronics.
Yea, old Ben gets the blame, but there was no way for him to have known. Some people at the time believed there was one kind of current flowing one direction and another flowing the opposite. We know this is true in some materials today (electrolytes in particular) but Franklin thought a single direction of flow was what was going on. The formulas all worked well with just one current traveling one direction (and they still do) the only thing was to decide on the direction it was going so the numerical sign value (positive or negative) would be consistent.
+JonPoncho This is what is called conventional current. All electric formulas are based of current flow from positive to negative. This direction of flow was defined long before the existence of electrons was known or that they were responsible for current in most conductors. Not all current is due to the flow of electrons. In semi-conductors, electrolytes and plasmas, positive charge carriers also can create current.
When he mentioned googling for pictures of human parasites, I almost
expected him to post a picture of Donald Trump... But I guess that would
have been controversial, calling Trump human I mean.
+Jean-Frédéric Rolland he probably meant you, especially after you think Harvard just gives degrees away. But just about anyone who comments about trump under a science video, probably doesn't have much of an education to begin with. That makes you a troll...a very unoriginal one too.
+TheIgors20 Who Trump or I? If you meant the former I sarcastically agree, if you meant me then I fail to comprehend your standards for defining education. What is YOUR level of education pray tell?Also, the fact that Trump's dad paid his son's way through Harvard business is more a put-down on Harvard than a guarantee of said hairpiece's education. If Trump is "educated" than I know college professors who are metaphysically all-knowing!
+Jean-Frédéric Rolland Unfortunately, this came out a few years ago, so it wouldn't have been as accurate as it is now.
Great Minds: Benjamin Franklin: Founding Nerd
Learn the truth about Benjamin Franklin, his experiments into electricity, including the real story behind the kite and the key. Hosted by: Hank Green ---------- Like ...
*Hank Green*: So, Grandpa Nerd, what can you tell us about yourself?
*Benjamin Franklin*: Well, I am a renowned author, printer, political
theorist, politician, postmaster, scientist, inventor, civic activist,
statesman, and diplomat. In my spare time I also quite enjoy sexual
intercourse with as many ladies as possible.
Have we found a way to capture the energy of lightening? Is this a dumb
thing that I've imagined with no basis in science?
(I mean, as a kid, when I learned about bio-engineering, I imagined that if
we could take the genetic material from an egg and put another egg's info
in, we could do the same with DNA from a sperm. I'm still convinced that
this is a thing.)
Capturing energy from a lightning storm is rather simple. However, capturing energy from a strike is more difficult. It's so high in voltage that it's a challenge to convert it to the lower voltage needed to store it. I don't think we can do that just yet, but given enough resources, we should be able to do it in a couple years. I don't know how valuable it is though.
many of the greatest minds in history had a psychiatric disorder. MLK and
Lincoln had severe depression. Newton was thought to have something but I
forget what. Maybe somebody could look that up. Mental illness isn't
required to be a great thinker, obviously, but if you have a disorder,
you're among friends in the world.
+ColdMist lol they used to use mercury as medicine back then didn't they? I think one of China's emperors was buried with mercury all around him and he actually died from mercury poisoning.
and I believe depression helped MLK speak so eloquently and empathetically. He knew the struggle so well he could speak like such a leader
Dark Energy
The universe is huge and getting bigger all the time, and we have we have dark energy - the most mysterious force in the universe - to blame/thank for it.
He said that more empty space can be created, but empty space is dark
matter. And matter cannot be created or destroyed. So how is more empty
space being created?
This week's SciShow news has Hank bringing us a primer on the science behind various illegal and illicit ways in which athletes "improve" their bodies, proof of ...
+kawin1997 Who doesn't know the difference between freezing and refrigerating? Even if that was the question "put it in the freezer" doesn't really illustrate the difference.Thank you for your input but I'm trying to confirm that he meant that the athletes refrigerate the blood rather than freeze it. I'm pretty sure freezing the blood destroys it while refrigerating the blood preserves it.
No what? -- you said "Wait, he said they freeze the blood. He meant refrigerate right?" I thought you were asking the different between "freeze it" and "refrigerate it".
+Nalothisal I took a class on World History and there was an entire chapter dedicated to discoveries in Arab countries. However it said that they were merchants that traveled the world and brought some ideas home to Arab lands and people assumed they discovered it. That seems like a reasonable explanation to that.
+Tayyab Pirzadaoh it goes further than just calculus. he says everything that happens, every effect you see in the world does not have a cause that can be identified measured and replicated to repeat the same effect but is an act of allah. thereby saying that nothing exists without allah making it so. he says any scientific effort is futile and the effort should be put into worshipping allah. well then my argument stands even stronger. he must be erased from history , discredited, exposed for the manipulator he is, only then will muslims allow themselves to think again like they used to before hamid came along
+Tayyab Pirzada if it's so obvious that I know this from other sources than his real works then there's probably more to it. I will look it up. if my arguments need to be nuanced I apologize
+Tayyab Pirzada Ps somewhere in the 10th or 11th century hamid al ghazali, an important religious mind at the time, called mathematics and calculus the work of the devil, marking the downfall of the scientific progress made by races and cultures where Islam reigns. as of today 30 or 40% of earth's population I muslim and somewhere around 1% of all Nobel prize winners are muslim whereas only 16 million people are Jewish (0.28% world population)and the percentage of Nobel prize winners that are Jewish is around 20 %
+Mortophobe Persians and Arabs are two very distinct peoples, with very different histories. In fact, the Arabs didn't really play a large role on the world stage until the seventh century, whereas the Persians were a geopolitical force long before the beginning of the Christian era.
+Nalothisal where did he say muslim? he said arabic. that's an ethnicity (and happens to be where persia used to be). the history of persia is the cause of the self absorbed ego pride arabic people have today. not the fact that theyre muslims (though some of them even seem to forget that at times haha)
Actually, although Einstein discovered the photoelectric effect and the
photon, the photon has nothing to do with gravity in his thinking. General
Relativity ascribes the effect of gravity to distortions in the fabric of
space-time caused by the masses of the objects in it.
+Xenon Creed You know what I would like to know? How does the Higgs boson cause mass to distort the fabric of spacetime, and where are gravitons supposed to fit in the picture? I guess no one really knows yet, but I'd love to see a video summarizing all the current speculations.
You're probably aware of lots of the things we take from animals, but for centuries, humans have been sneaking animal secretions into a bunch of things you ...
Actually, my diet is at the very least 25 to 50 percent vegan, thanks to soylent. In addition, I don't mind actually eating it after learning the facts about where some stuff comes from, it's merely an issue of learning something /as/ I'm eating it.
+Glacier Nester Why? I can watch and eat it. Maybe because I do not consume nor use animal secretions in any way. If you can't watch it or listen to it, then don't use it and don't eat it!
Some extra information about ambergris from an Australian government
website if anyone is interested:Ambergris is a solid, waxy material
produced in the sperm whale (Physeter macrocephalus) and also in the pygmy
sperm whale (Kogia breviceps). It is however, only found in about 1-5% of
these whales, so is not a common substance.Clarke (2006) explained the
process of ambergris formation in sperm whales. It is suggested that it is
formed in the intestine of the whale to cover the indigestible objects from
the animals on which it feeds (mostly the beaks of squid). A common
misconception is that ambergris is released as faeces, however whale faecal
matter is fluid and whales could have difficulty processing large pieces of
solid matter. Large pieces of ambergris seem to build up in the whale
intestine over its life and is usually released when the whale dies.
Initially it floats on the ocean's surface and is black and sticky.
Exposure to sun, air and salt water oxidizes it, and eventually it becomes
grey and waxy, often still embedded with small squid beaks. and losing its
unpleasant odour.Ambergris is found in lumps of various shapes and sizes,
ranging from 15 grams up to 420 kilograms. Ambergris floats and is
sometimes found on beaches and shorelines. During the days of whaling
ambergris was one of the many products to be taken from sperm whales.
Ambergris has been known to come from sperm whales since 1724 (Boylsten in
Berzin 1972).
+parkwaydrive77 Yes there were / are poachers who kill sperm whales and try to collect the ambergris. Makes me wonder about those dead whales washing up lately.
When oh when are we going to rid the world of "natural medicine""""". It
does nothing but scam the user into a placebo cure and destroys nature in
the process.