What's the Difference Between Petrol & Diesel? | Bang Goes The The Theory | Earth Science

Soot gets the moot😂

+1 wisdom = thank you

I wasn't expecting When You Were Young to be in this video, pleasant surprise.

Thanks for letting me know. Very informative.

Powerful video good job

Nice demo. But - This is typical brainwashing with an apparently honest BBC smiley face. It's utterly simplistic nonsense, designed to indoctrinate, and not educate. Physics facts: The diesel cycle was invented to do a different job - produce very efficient power from the 4 stroke reciprocating piston cycle that most ICE engines use. And that it does very very well, which is why diesel engines can, and do, run extremely efficiently at full temperature and high power outputs e.g. cruising on main roads (not low temperature running around towns where no engine of any type is suited for efficient combustion in stop/start driving).
The high performance diesels in trucks and cars produce almost NO soot at normal running temperatures because where there is soot there is unburned, wasted fuel. What soot remains on the open road is catalytically burned in both the soot trap and the catalytic converter.
Now - it's true that if the engine allows the driver to boost power too far, there may be unburned fuel sent to the exhaust, emitting smoke (and we may see that when boy-racers overtake us, either with petrol or diesel engines). However, there should be another video made which examines the dangerous fuel components from cold-running a petrol engine: RAW highly toxic benzene/toluenes and other compounds are highly cancer-inducing (like alcohol they penetrate inner parts of our cells), and which travel straight to the brain from the lungs. These you can detect as a sickly sweet smell as a car passes us sometimes. It takes at least 5 minutes for that to end when a petrol car is run at low speed, because the catalytic converter can't burn up and remove those benzenes, toluenes and other nasties from the exhaust until it is very hot. Go and look this UP in research papers please BBC Earth Lab.
I would rather (if walking on the street) have to sniff a tiny amount of diesel fumes/soot - most of which is removed anyway in the exhaust parts from a modern diesel engine - relatively less harmful, many believe, than have to breath what are certainly very dangerous brain carcinogens from cold running petrol engines. And, every day in winter especially, so-called 'clean' petrol engines throw hundreds of tonnes of these toxic materials into city air across the UK. It is measurable, the Authorities know about it, but because the stuff is not so visible as a few old diesel smoky engines are, it's ignored, and the public doesn't get the truth. And we wonder why brain cancers are on the rise in little children. Facts please, not environment spin, BBC Earth Lab.

Best ever explanation!

Petrol engines are mostly found in
Lawnmowers, chainsaws, snowmobiles, boats, jet skis, scooters, motorcycles, quad bikes, go-karts and ultralight aircrafts

Diesel Engines are mostly found in
Cars, trucks, vans, buses, trains, tractors, industrial machinery, military vehicles, power generators, freight vessels and construction equipment

Excellent....

this is the best video in this field!!!

Short and informative.

i made a gasoline vapour system, now my 2010 gmc 4x4 gets 200 km and gas tank is still on full

Hello bigman what is that cylinder made of. Is that glass or clear pvc pipe.

The best explanation I have ever read n heard...

ive owned a 1.9diesel van since 2015, ive wrote down every amount of fuel ive put in it, im quite shocked how much i have put in it.
considering i hardly use it, i dont work much so its not done that much commuting, often there was weeks id never use it, but still ive put in 2928 pounds of diesel.
thats more than ive ever had in savings.

The emissions information is out of date.

simple
gas. = -21c flashpoint
diesel. = 55c flashpoint

Aaaawesome

Unbelievably, great explanations from practical standpoint. Quite inspiring and helpful in learning for any physics student! 😊

And we use diesel because it gives twice as much power as its counterpart

Very inspirational

😂….to hell with volume of compression and HEAT VALUE 🤦‍♂️….this has to be the worst example I’ve ever seen…this guy clearly has never worked on anything that runs on either fuel

🆒

Still diesel does a much better job in terms of effieciency and engine longevity. There is no way one could replace a diesel engine with petrol in the industry or long range travel. BBC is doing a mediocre job at introducing the true state of facts as always.

well that was fun

I hear FIREFLIES 😂

Diesel is more efficient and better.

Nice explanation 👍🏻

Absolutely fantastic demonstration 👏🏻👏🏻👏🏻

Petrol car best

Best explanation ❤️

There is no reason that you need a diesel car you're not pulling anything. that's stupid. No car needs a diesel engine.

It says nothing to the fact that diesel fuel is the cleaner burning fuel or the fact that diesel fuel uses compression and glow plugs to combust the fuel inside the cylinder and also doesn't acknowledge the fact that diesel can get twice the range and three times the torque compared to gasoline. and it does not talk about how gasoline is just a waste byproduct of the production of diesel fuel.

I love the fireflies background music at the beginning

Loved it! thanks

This video deserves more views that's an amazing example you would be an amazing teacher

Nitrogen dioxide is actually very good for the soils and environment.

How about if we just put that match to an oil, without getting contact with a gasoline vapor?? Will it burn?? If u know pls answer me

And yet 5 years later they say diesel is many times better for environmeny then petrol. 🤔

May 2015: "All but the latest diesels"

September 2015: "Oh...."

They didn’t really explain how diesels don’t have spark plugs and fires off of compression

Practical working shown, You made concept very easier to understand for students. Thank you.

Actually hydrogen content in diesel (C12H28)is more than any fuel even petrol (C8H18) also less than it .. that is why diesel not need a ignition ... but the lack of oxygen in the air not enough so pollution happens .. to reduce pollution attach a HHO injector available in market .. it injuct clean hydrogen and oxygen in to engine and unburnt diesel will burn and water made from the hydrogen combustion will wash all nitric and other dirts ..government should encourage such activities

No mention of diesel's better efficiency?

Great demo whos watching again in 2021?

Very good practical and very good explain.... Maind clear

Awesome explanation on engine bro