Editing 2743: Hand Dryers
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==Explanation== | ==Explanation== | ||
| − | A {{w|hand dryer}} is an electrical device which uses air flow, typically of hot air, to dry the user's hands after they have just washed them. In the 30 or so seconds it takes to dry the hands, the user may feel as though the air coming from the hand dryer isn't actually warm, hence seeming like they "take forever to heat up | + | {{incomplete|Created by a DYSON ENGINEER - Please change this comment when editing this page. Do NOT delete this tag too soon.}} |
| − | + | A {{w|hand dryer}} is an electrical device which uses air flow, typically of hot air, to dry the user's hands after they have just washed them. In the 30 or so seconds it takes to dry the hands, the user may feel as though the air coming from the hand dryer isn't actually warm,{{citation needed}} hence seeming like they "take forever to heat up," while in reality the water evaporating from the user's wet hands absorbs heat from them, as well as the possibly heated air, as {{w|evaporation}} is an endothermic process. Thus the user does not ''feel'' that the air from the dryer is warm, even though it is, and will only start to do so once their hands have been significantly dried. Interestingly, this absorption of heat through evaporation is how human {{w|sweat}} has its cooling effect, which means that even warm ambient air can be made to feel colder by being wafted across a person's dampened skin (which is how a regular fan works). | |
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Randall has procured a small airplane, accompanied by a banner with a message explaining this phenomenon. He elaborates in the caption that he's spent dozens of years angry at the engineers of these hand dryers, as he was under the comic's erroneous impression that the air from the dryers was not actually warm. In an act of justice for hand dryer engineers everywhere, he now considers it his personal mission to explain to the public why this is actually a misconception. And indeed, it seems to be working - a person on the ground has already been [[1053: Ten Thousand|enlightened]] by Randall. | Randall has procured a small airplane, accompanied by a banner with a message explaining this phenomenon. He elaborates in the caption that he's spent dozens of years angry at the engineers of these hand dryers, as he was under the comic's erroneous impression that the air from the dryers was not actually warm. In an act of justice for hand dryer engineers everywhere, he now considers it his personal mission to explain to the public why this is actually a misconception. And indeed, it seems to be working - a person on the ground has already been [[1053: Ten Thousand|enlightened]] by Randall. | ||
| − | In the title text, the {{w|speed of sound}} is the speed of a sound wave in a given medium, usually air. Breaking the {{w|sound barrier}} is often touted as a significant achievement for powered aircraft (this was first safely achieved in the 1940s, and became significantly 'easier' with the development of the jet engine). Here, Randall thinks it would be a good idea to try and get the {{w|Dyson (company)|Dyson company}} (a technology company known for making high-tech and expensive air-moving devices) to design a hand dryer whose airflow would exceed the sound barrier. | + | In the title text, the {{w|speed of sound}} is the speed of a sound wave{{citation needed}} in a given medium, usually air. Breaking the {{w|sound barrier}} is often touted as a significant achievement for powered aircraft (this was first safely achieved in the 1940s, and became significantly 'easier' with the development of the jet engine). Here, Randall thinks it would be a good idea to try and get the {{w|Dyson (company)|Dyson company}} (a technology company known for making high-tech, fancy and expensive air-moving devices such as vacuum-cleaners, fans and hand dryers) to design a hand dryer whose airflow would exceed the sound barrier. This would be technically difficult to achieve with such a relatively small device as a typical wall-mounted hand dryer. Nor would such a hand dryer really be practically useful, given that air currents faster than the speed of sound could cause injury to the hands of the dryer's users,{{Citation needed}} amongst other unintended effects. |
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==Transcript== | ==Transcript== | ||
| + | {{incomplete transcript|Do NOT delete this tag too soon.}} | ||
:[An airplane tows a banner. In the distance, there are three small clouds and three birds] | :[An airplane tows a banner. In the distance, there are three small clouds and three birds] | ||
