How Do Airbags Work and Can They Really Kill You? Chemistry of Cars Ep.2

[@rickoh7578]

Charlotte, a lot of work and research went into your presentation, well done. A great addition to TFL cars, etc.

[@catfishmudflap]

Welcome back Charlotte. Thank you for another excellent presentation.

[@autovidz2455]

You guys should do a timelapse of the drawings. I'd like to see how they drew the Olds.

[@TFLcar]

Will do. That's all Charlotte's work. Thanks for the great suggestion.

[@SkodzGaming]

The Fast Lane Car impressive

[@SkodzGaming]

Looks like engineering explained but with a sexier host, which is a big plus!

[@ownliver]

@TJC450 Talking about yourself?

[@TJC450]

I mean I am a bit of an asshole. But was not talking about me in this case.

[@mohammedosman88]

agree

[@tropicaltanktv]

I don't know.. Jason's sexy af.

[@housepianist]

Nice video. I would like to see a video about octane levels in gasoline. Manufacturers will always tell you what the best gasoline is for your particular vehicle. What I'd like to know is what do manufacturers do with an engine to require premium gas vs regular gas? I know you can run such an engine on regular gas at a reduced output but does that hamper its function in any way? Also, what happens if you use premium gas in an engine designed to burn regular gas? Any performance benefits? And does it cause it to burn leaner than it should? Thanks and keep up the good work.

[@revgordon91]

I'd like to see that too!

[@charlotteroadcap6426]

Randall Collins Hey thank you! Octane levels are definitely on the list. Octane ratings are not only a measure of how much octane (as in the molecule C8H18) is present in your gasoline but also serves as a measure of how likely it is to prematurely detonate (knock) Lower ratings=more likely. Essentially its super important to use the proper fuel required by the engine to reduce the chance of knock (premature detonation in the cylinder before piston reaches top dead center, or whatever you timing is supposed to be set to). Some engines are way more sensitive to knock, for example the turbocharged boxer engines you'd find in a WRX. Other engines aren't as sensitive, like the 1275H A-series in my classic mini. How stuff works has some cool explainations on knock and octane and the like!

[@sadiqsamawi]

I have a suggestion for a video. I live in a desert weather where temperature varies greatly between night and day from 110 F at noon to just around 60 F at dawn. The myth is that pumping dense fuel at cool weather is smarter than less dense fuel at hot weather, which means more fuel for the same amount of money, A lot of people around me believe it but I have my doubts. So, my question is: Is that true? if Yes, how much is really the difference? and Doesn't the density of fuel vary inside the tank of the car as well? So, it really depends on what time you use the car not the time you pump the fuel? Thanx, and great videos :)

[@60andcuriousrobson13]

Fuel pumps at the gas station are corrected for volume changes with overall weather, or so we hope. Underground temps in the storage tanks change a lot less than the air. Regulations for fuel dispensing pumps are partly designed to make sure the dollars charged represent the same weight of gas most of the time. Fuel injected cars with gas engines use Mass Air Flow sensors on the intake, and O2 sensors on the exhaust to compensate for the difference in fuel density as well as air density. Do you remember the "FLEXFUEL" designation on many new cars? the injection systems compensate for how much alcohol is in the gas mix, from 0% to E85 , that is 85% alcohol (much less energy in alcohol)

[@sadiqsamawi]

These are all fantastic points ! "Underground temps in the storage tanks change a lot less than the air. " This is a very important point I hadn't considered .. Thank you :)

[@sonictech1000]

60andcurious Robson Agreed about the underground tanks but are you sure that there is some sort of correction going on at the pump? That doesn't make sense to me because we are charged by the gallon which is a unit of volume, not mass.

[@60andcuriousrobson13]

My understanding comes from a news report many years old. A dispensing pump, that is a pump that measures a liquid for the purpose of a sale, is calibrated to accurately reflect the amount charged. In this report, a group was spot checking various gas stations and they pumped a given volume, for which they had an accurate weight, and they took an actual weigh of the filled container. They found a few that were off, and hadn't been serviced, and They found a group of stations were selling a mixture of contaminated gas because the weight was different. There is a label on Canadian gas pumps that reads "corrected to 15C" I don't know the mechanics of the mechanism, but a pump precicely measures volume, and an amout is calculated by the mechanism to reflect the weight based on a temperature. In winter, the gas is cooler and denser, and the mech ups the displayed amount of fuel so the final liters (gallons) would weigh the same at any time of the year. Any pump can be inaccurate by a little, and regulations require calibration often enough to minimize the amount of time it might be inaccurate. We would have to hear specifics from a gas pump technician

[@tebo2770]

I'd like to point out that from what we see at our body shop on a day to day basis; airbag systems seem to either fail to deploy, deploy in incorrect locations due to faulty occupant sensing circuits, or deploy when they shouldn't . More often than not; they fail to deploy. The math is neat to look at and the concept is sound. I just see results over time that make me question the build quality of these systems.

[@MahatmaGumbi]

Love the show! You are good at explaining complicated things! Keep up the great work!

[@CaptainRudy4021]

You should show how torque is transmitted through a torque converter and automatic transmission in one episode and a clutch and manual transmission in another episode, the difference between an open differential, a limited-slip differential, and a locking differential in another episode, how a two speed transfer case works in another episode, and the differences between different engine blocks (i.e. V6 vs I6 vs Slant 6 vs Flat 6) in terms of how they transmit power and torque to the rest of the drive train in another episode.

[@swmike]

Apart from the psi slip at the end, this was a presentation completely devoid of non-SI units of measurements. Thanks for that.

[@dcfla755]

Great video, but I have to respectfully disagree with what vehicle had the first air bag. In 1973 I was T-boned by a Oldsmobile Cutlass Supreme. I was thrown from my car and down the road. The man who hit me (other than a split lip) came away unscathed, thanks to an air bag. I was led to understand that this was experimental at that point in time, but there was definitely a deployed air bag on the driver's side of the Cutlass. Thanks again for your informative video.

[@charlotteroadcap6426]

Oh for sure I completely agree and I am glad you are ok! There definitely were airbags in cars before the toronado, the tornado was just the first consumer car to have airbags as an option available to the general public. Pretty crazy how it was advertised as an alternative to shoulder belts too. This is a pretty cool article on the history :) www.secondchancegarage.com/public/history-of-airbags.cfm

[@revgordon91]

Charlotte Roadcap your videos have been very informative and many Americans appreciate what you do. We hope you will still consider teaching chemistry to car enthusiasts like myself again soon. Really looking forward to your next video!

[@SkodzGaming]

The classes i paid the most attention to in school were always the ones with pretty teachers :p

[@katara5703]

Great video. keep up the good work. :D

[@trevorsmaddox]

I'm not sure if its possible, but I think it would be cool to have a video on the chemistry of different types of tires like mud terrains vs racing tires. Why and how some tires have 80,000 mile warranties, and others only 40,000. For example BF Goodrich M/T KM1's have a harder compound and last significantly longer than the KM2's, but the KM2's have better grip, and don't hydroplane as easily.

[@enowong]

Love the new show TFL. Really love how you've been expanding the channel!

[@mrecharleswhyte]

Great presentation Charlotte. I usually get lost with the chemical reaction and math but I can still follow to the end result. It is nice to see it explained, I also subscribe to Engineering Explained. Congrats on the graduation and I wish much success to you on your future endeavours, be it on TLF or otherwise. Please keep going with this as there is no shortage of topics to do. You have clearly put in the time, and have the smarts to know what you know and looks should be irrelevant, please don't let the sexist, creepy, weird, nasty, etc etc comments get you down.

[@BullittOutdoors]

I'll be honest, I figured this series might end up being an Engineering Explained rip-off, but 2 episodes in and it's kicking ass so far. Props to Charlotte and TFL!

[@elurb7231]

As I understand it the practice is using a few different size standard inflators(the chemicals and ignitor) and then doing all the fine tuning by the vents in bag which is made more specifically to fit individual vehicles.

[@23billd]

Nice job! Other ideas: chemistry of coolant degradation, oil life factors, corrosion of brake systems, electric car battery chemistry, direct injection and turbo charged engine physics. Other possibilities are fuel cell operation and chemistry. Compare and contrast fuel cell efficiency to gasoline engine efficiency.

[@charlotteroadcap6426]

Oh my gosh yeah corrosion and rust would be a really amazing one!! All the others are for sure on the list!

[@Happyman-od7zp]

Thank You very much for creating this video! This will very much help me towards my project and grades.

[@davithkane1369]

I knew this, but it's good to refresh. I will look at my car very differently today. lol!

[@Van-Hammer]

Thanks again for this lesson Charlotte and I'm really impressed with your artwork as well. It really serves as an excellent visual aid with your topic. Love that car! Also, thanks for not giving us a quiz.

[@christopherrice4816]

It's like physics, but better because it's about a topic that's actually interesting! Great job, Charlotte.

[@iamsam8446]

This is why it is critical driver and front occupants sit at the correct distance from the air bags, and to use your seat belts. I was in a low speed collision (~40 mph) and my bags deployed, but I was sitting far enough way that my face never hit the bag. But it made a mess and my car was "totaled" as a result. Seat belts are always the primate safety restraint... air bags are only supplement, not a replacement.

[@ahmednoman3135]

Thank you so much. Loved it

[@MichaelJimenez416]

Very well shot, researched and edited! Please make more 😃

[@alanplur]

Excellent video which brings something different to an ashtray great channel.

[@Joel_E]

Great video! Don't let the boorish comments get you down. I enjoyed seeing the chemistry and physics with real-world numbers. You seem to have corrected "guage pressure" into "gauge pressure" during the 6:47 cutaway, which was amusing.

[@macbookpro57]

I didn't know that about how cars use your weight to determine the pressure of the airbag. That's cool!

[@JohnSeitz]

Another cool explanation! I agree octane level and how modern awd systems operate.

[@YukitakaOhashi]

Amazing explanation! This is so cool because I could see the real application of physics and chemestry!

[@dustyrusty7956]

Excellent presentation.

[@dansheifer9227]

Very well composed and amazing presentation very easy to follow

[@ratonL]

Wise addition to the team, she provides great content.

[@cloudk2088]

All these equations gave me a Vietnam flashback to organic chemistry >

[@rogerj412]

These videos are really cool. Admittedly I'm a nerd with an art degree so anything scientific and artsy I'm totally going to be watching.

[@djipka]

Cute + smart + likes cars = a beautiful unicorn girl! You go girl!

[@pauls3758]

Nice love tfl anything you guys do great work

[@Happyman-od7zp]

Thank You very much for this video. It taught me a lot and really helped me, towards my Physics project

[@Stuka87]

This was a really great episode, look forward to more. Chemical makeup of some fluids used would be great.

[@smarticus6384]

I really enjoy these videos. Keep up the good work.

[@trippm4036]

First of all Great Video. Much more interesting than a couple of middle aged guys having a conversation about car stuff. Should be called 'Chemistry and Physics of cars'. It would be great to explain how humidity is affecting the airbag recall. Those of us in the South get priority on the recall because of humidity causes the silica material to clump and become a projectile. Acceleration is misspelled on the board. Nonetheless, this series may take you to the million subscribers mark.

[@phillipcoiner4232]

Where is the playlist with all her videos? I loved the one on DEF chemistry. More on the chemistry of combustion how an EGR valve (do cars still have those??) effects emissions would be interesting.

[@supernova1976]

Well-done , really like the new series.

[@michelleluna4278]

Another great entertaining and informative video!!

[@johnfleck4738]

How about a discussion using chemistry of the off-gassing of interior plastics and how they make the inside of windows dirty and give us "New Car Smell"???

[@snakebyte130]

Digging the Chemistry of Cars! Welcome to the team Charlotte!

[@adithyaramachandran7427]

Charlotte, I like your analytical thinking skills. I really feel you have a very bright future ahead of you as an engineer or scientist. What are your future career plans ?

[@charlotteroadcap6426]

Hey thank you! The plan is to work in Denver as an analytical or organic synthesis chemist (on that post-grad job hunt) and keep messing around with cars here at TFL. And also get a big dog to be my copilot soon haha

[@adithyaramachandran7427]

Charlotte Roadcap : Nice to hear. So, have you ever considered applying to car companies and working under divisions like alternative fuels ? Just curious, that's all !!

[@charlotteroadcap6426]

Definitely! However I would very much like to go into environmental analytical chemistry. Water Chemistry related to environmental cleanup would be a dream job for sure.

[@adithyaramachandran7427]

Charlotte Roadcap: Alright then. Thanks for making me aware of your intended path.

[@MrChiPPyTubE]

I'd like to see a chemist's explanation of tire compounds, and explain the differences between winter, summer, all season, and track. Does that sound like a topic that Charlotte might be able to cover?

[@charlotteroadcap6426]

I certainly will add this to the list!

[@rich00273119]

Very interesting. Congrats Graduate!

[@michelpage9827]

Wow Charlotte, you do a awesome job, thanks!

[@phillipcoiner4232]

Super fantastic video. How about how an EGR valve works to reduce emissions? (Do cars still have those?)

[@vnsfxr]

Good job Charlotte!

[@joerizkallah7747]

Hi how did you get the 3.2 moles based on your replacement it is impossible please explain

[@robertcarp3469]

great job and informative

[@peterdaspit5790]

Great Video! But a couple of things: (1) How come 3.2 moles x 65g/mole comes out to something other than 208 grams? (2) The airbags that were/are killing folks are doing so from shrapnel released from improper (too violent) chemical reactions due to poor QC in manufacturing and flawed assumptions about chemical stability under all environments. Perhaps a short video on the fallacy and dangers of assuming away/ignoring chemical test data that is a problem would be of interest to KZbinrs following this series...

[@GameTieTV]

She is making america great again

[@1guyin10]

How is the chemistry of tires adjusted to achieve particular performance goals?

[@GerryStilton]

Awesome, science geekette! Very educational!

[@ib516]

I'd like to know about engine oil. "Total Base Number" TBN, and the additives they use.

[@Sayua-chan]

Chemistry subject: You probably know what happens when people fall in love, what sort of chemistry is going on and what triggers it. Please explain why I feel like that every time I see an Alfa-Romeo 159 sedan in black color with these beautiful bespoke rims that look like biohazard sign but with more circles. And now there's the new Giulia, which although has awkward face it still gives me goose bumps. I guess I identify as petrosexual, although no other vehicle makes me feel this way.

[@60andcuriousrobson13]

How about a video about the products of combustion, in a bit more detail, rather than just CO2, Co, Nox , hydrocarbons and water. I'm interested in the various intermediate compounds, that form during the combustion stroke, and how they are different as they cool and go thru the catalyst. Did you find any material on the partial pressure and temperature of oxygen at the time of the flame burn. Also, high compression gas engines produce more NOx, and that was one reason for the low compression engines in the 70's when catalysts were first fitted to cars.

[@withstyle7816]

I would love to see some chemistry stuff on what actually keeps the diesel injectors clean. Atf?1:200 2 stroke oil? Also 1;200 .

[@sravens5035]

Hey! that was a bit presentation for want i want.i just doing a project on basis of air jacket but without air cylinder and by means of chemical reaction like this. Do you have any suggestions on which chemicals would be greatfull

[@rgs455atw]

I would be interested in the chemistry of fuel cells and are they the future of the automobile?

[@rubenardesch]

Great video! Also, nice units! The unit of measurement I mean.

[@OverlandTT]

Great video, it would be a fun idea to have all the tfl team sat in the classroom with teacher Charlotte 😊

[@tomkergil3304]

Very well done. Noted strong Physics background weel explained. You sound more into Organic than Inorganic chemistry. Did not explain the strength of the magnet.

[@Brian-gv7ug]

great job!

[@rnunez6398]

I'm confused on how you get to 138 grams of Sodium Azide. Can you clarify? I thought you were multiplying 3.2 by 65 but of course that's not 138. What step did I miss? Reminds me of why I was never a chemistry or a math major.

[@rnunez6398]

Thank you for the clarification.

[@foxy-cz7gi]

tell us if higher octane (premium fuel) is beneficial for cars that don't require it

[@60andcuriousrobson13]

My 2012 F150 does not do better unloaded but does do better loaded; it's more efficient under high load. My brother's GMC 1500 6.2 L gas appears to do better most of the time; it is a higher compression engine, and regular gas causes the engine to use less"timing" to avoid knocking, and would appear to be less efficient. Any engine; the higher the compression, the better it will run with higher octane. You can do your own "Gauntlet" run, with your vehicle loaded. and compare mileage and seat of the pants feel in your own vehicle. A tank of regular, then a tank of premium. It's recommended to follow Mfg's requirements in your owner's manual

[@muhammedsheriff5351]

Charolette's smile is gorgeous! :)

[@GloriiCC]

Omg Charlotte! It’s me Glori! You were the flower girl at my mom and dads wedding!

[@maysammirzakhalili4862]

Dear Lady, thank you very much for 💐💐💐, for your brilliant presentation. I am also impressed and very excited about your knowledge 😊 and talent. ✌🏻🙏🏻👏🏻👌🏻🌹🌹🌹💖🇺🇸. I do not know what are you doing now but I wish to to see you always happy, healthy, wealthy, successful and strong. 👏🏻👏🏻👏🏻.

[@joerizkallah7747]

Hi guys It's a great video I just want to ask did she make a mistake in the ideal gaz law, specifically she considered the mole from the ideal gaz to be for sodium azide. However, I think it is for the sodium gaz so it needs some additional work to get mass of sodium azide. Does anyone agree? I am 15 years old so not sure. I don't have my bachelors yet.

[@Tully3674]

I had read that Chrysler had the first airbags in the 1950s. It may not have been constructed as they are today, but...

[@TheoPhilpot]

Taught me more than my whole chemistry class

[@tallll70]

There are also mechanical components in airbags which can cause harm. In a fact somebody i know of got his throat slit by airbag blow in 40mph accident. Yes sad, but i can also imagine amount of unpredictability in accidents and airbags do save many other peoples lives. I just hope this accident will get reported so proper adjustments could be applied.

[@michaelesbjorn5167]

FUTURE IDEA. Nitrogen vs. standard atmospher for tire inflation.

[@ProjectM97]

talk about the makeup of brake fluid and why it is used

[@MyTutorGuy]

Is there a scale factor missing in the final calculation. It seems to assume that 1 mole of Azide makes 1 mole of N2. But the equations say 10 moles azide makes 16 moles N2?. I could be wrong.

[@jmoranretana]

great airbags explanation

[@halliesartelle6079]

ohh we could read into this...

[@Joey-cq7tn]

I dont think ppl are interested in chemistry. Everyone just wants to see the cars

[@Merfsplace]

Thanks.

[@johnnybarrett173]

First I have to say that you are quite pretty, and didn't know that a 1974 Oldsmoblie was the first car to have an airbag I thought that you was going to say that the Mercedes Benz S class or a classic Volvo was the first car to have an airbag. I always thought it was one of the two automakers was the first I was wrong .

[@XLC-zd8dn]

You should have told people that while an airbag can kill you, it won't if you have your seatbelt on, proper distance of body from steering wheel, and don't rest your arms on top of the steering wheel. Especially don't drive gangster style seating position.

[@1topskyrocket]

Did you lately ignore the fact that some people into Haley's chemicals and it kills them within a week. One week before my dad died from airbag poisoning, I watched a show about two different women that were young, into different car accidents. The first gal complained of chest pains and then that turned into confusion and ending up with a stroke on one side of her head and body. Within 24 hours she had a second stroke on the other side of her body which then turned into a coma and then death. The second victim they tried to counteract poisoning, but the TV show finished and never gave us the results of her outcome. I figured she died because she was already in a coma. So when I showed up in Florida to watch my father die, and heard of his symptoms which were identical to the first girls symptoms, I knew what it was. Nobody listen to me back in 1996. However five years later my stepmother believe me then. By the time I got to Florida my father was in a coma and I explain to him what was wrong and that time was up. So at least you didn't die not knowing what killed him. This is what I thought you were going to talk about. I see I made a couple mistakes I'm unable to edit it.

[@Shahabbi]

what is the difference between a supercharger and a turbocharger? and how do they work?

[@remixislandmusic510]

I thought airbags only deployed if the sensor was impacted, not when you stop fast. And now i know lol!

[@patriciapawlowski8903]

Does anyone know What the balanced Chemical equation for the airbag deployment is? And also does it use a Catalyst And.... what type of chemical reaction it is ??? I’ve been trying to figure it out and I can’t please respond to my comment thanks!

[@chrissuski1003]

3.2 mol x 65 g/mol isn't 138 g. can you clarify?

[@H00KY12]

I think it's because of the molar ratio of 2:3 in the original reaxtion. In the ideal gas section you're calculating moles of N2, not moles of sodium azide. So when you multiply that by the molar mass of sodium azide, you then have to multiply by 2/3 because in the original reaction of sodium azide into sodium and nitrogen, you start with two moles of sodium azide but end with three moles of N2.

[@chrissuski1003]

I follow now. Was just confused because it seemed like a straight equation but I forgot the 3.2 mol originally was supposed to be for the gas. thx!

[@charlotteroadcap6426]

No worries that was totally my bad!

[@terryl6706]

My Honda Civic has been recalled twice for airbags.My GMC pickup has never been recalled,I'm not sure which one I'm more concerned with.

[@aarsenalfan]

Holly shatizls, this was awesome 😂

[@2583060]

When did they replace the Jason?

[@mooosestang]

Airbags have come a long way, but they shouldn't have been used till they got it right in the first place and never mandated. Government control has ruined new cars. Instead of airbags, why not improve upon the primary safety feature that actually works? I'm talking about the seat belt of course which hasn't really changed in 50 years.

[@elliottwalsh94]

Seems a lot like Engineering Explained w/ the same approach and delivery as well.

[@IainWandersButIsNotLost]

How about why Europe uses so much higher octane gas than American and or why it took so long to replace lead as an octane booster in gasoline?

[@cassioconceicao123]

I believe 60L you used in the formula is incorrect. 60L=15gal. That is too much, even considering 5psi.

[@luisbarraza9709]

SI units for the win

[@brainstorm466]

Great presentation. Charlotte, you should continue to post graduate degree and seek academic instruction position. You're smart and you are a natural teacher.