Again a long enough length of tubing will ensure the operator will not get burned or covered in powder. Some methods include leaving the lid on the tin so that it blows off with some force when the powder ignites. A glass funnel may be attached to a length of Bunsen tubing and held firmly in a clamp stand as another alternative method.
This takes less time to set up each time and can be as effective as the other methods. If the powder has trouble catching, it may be too damp or if only some is catching, the flame may need to be placed closer to the opening where the powder is blown from. Some teachers may use a clamped Bunsen burner on a yellow flame instead of a candle so that the flame area is larger. Other powders can be used such as cornflour, regular flour or icing sugar.
Projected flames can be compared when using different powders, the flame size and shape may be affected by how much energy is contained in the food. As custard is made when heat and water are added to custard powder, the water from the fire engines that came to put the fire out created gallons of custard inside the building, which then came pouring out. A dust explosion is the rapid combustion of fine particles suspended in the air within an enclosed location. Dust explosions can occur where any dispersed powdered combustible material is present in high-enough concentrations in the atmosphere or other oxidizing gaseous medium, such as pure oxygen.
While custards made from powdered mixes are usually less fattening than those made from eggs and real cream, they are not usually considered particularly healthful. They tend to contain a lot of sugar, for one thing, as well as a number of preservatives.
This Birds Instant Custard Mix takes pretty much as long as it takes the kettle to boil — mix the powder with boiling water to produce a creamy, delicious custard that will add an essential touch to all kinds of desserts. That mesh reduces the flow of the water and the result is thickening. Instant Custard Powder is a powder that you make custard sauce from simply by adding hot water, with no additional cooking or work beyond stirring required.
It can be prepared and served from a measuring jug. Delicious examples: Starch-thickened custards take many forms, from pudding to pastry cream and cheesecake. Chris - And does the same physics apply to pretty much anything that's a fuel source, because you mentioned carbon, hydrogen and oxygen in the molecules for example. So basically anything that can work as a fuel, the physics applies?
Dave - Yeah. So if you can break up any fuel into very, very small particles and mix it with air it will burn very quickly. That's not just things with carbon and hydrogen in them; even things like titanium will do the same thing.
Chris - And essentially, in terms of a real world application, a diesel engine or an engine that's making a spray of petrol vapour inside the cylinder, air-fuel mixtures work in the same way, isn't it? Dave - Yeah, basically you're splitting up your fuel into very, very small particles, you mix it well, it'll burn. And the smaller the particles, the quicker it will burn. Probably the extreme examples of this is gas. If you mix gas with air really well, it will go off with a really, really violent bang.
Chris - And now you're going to show us how it works. You've lit a gas torch in front of us, which is keeping us warm on this very cold evening. You have a thing that looks like a gentleman's pipe from the s, but with an exceptionally long piece of plastic tube on the end of it, going into it. And you have loaded the bowl of the pipe with Dave - So basically we want to suspend this in the air, so I'm going to blow air into this pipe, the pipe's set off-centre so it kind of spirals inside the bowl of the pipe, so it mixes with air very very efficiently.
Chris - I don't have many hair follicles left now, or eyebrows, but there was an enormous fireball - basically that was about three feet across - and it went in a fraction of a second. It burns very, very quickly, lots of heat released. Last Name:. Email Address:. Phone Number:. Question Optional :. We respect your privacy - read our policy.
Explosion Risks in the Food Manufacture Industry Okay kids, take a tin of custard powder, open the lid and place it inside a larger tin with a sealable lid.
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