The Physics of Pressure Cooker Essay - 1743 Words

The Physics of the Pressure Cooker Generally, water boils at 100 degree Celsius (212 degree Fahrenheit) in normal room temperature and pressure. If somebody boils the water for five minutes or for twenty minutes, the temperature will always remain the same. The pressure of air affects the boiling point of water. If air pressure is changed, then the boiling point will also change according to it (How does†). This is why a pressure cooker cooks food quickly as the pressure of the steam in the cooker gets as high as twice the normal pressure of the atmosphere. A this pressure, water gets boils at 120 degree centigrade (â€Å"Foundation†). Before defining the term pressure cooker, we have to know, what is pressure? Pressure is the†¦show more content†¦According to Bueche, Professor of Physics at University of Dayton, gases are greatly affected by the pressure and temperature. It was broadly studied during 1700s and earlier. He found two general laws by Boyle and Charles. â€Å"Boyle’s law relating the pressure of a gas at constant temperature to its volume states that the product of the pressure and the volume is a constant. In symbols, PV= (constant) temperature constant. A second law, Charles law, states that the pressure is proportional to the absolute temperature i.e. P= (constant) (T) volume constant† (Bueche, F. 194) where the temperature is measured on the Kelvin scale. If a gas is heated in a closed container, the pressure of the gas varies accordingly with the temperature and on the absolute temperature scale, the equation of which becomes P= (constant) (T). On combining the Boyle’s and Charles’s law we get the single equation PV= (constant) T where T is in degree Kelvin. If T (temperature) is constant, this equation resembles with the statement of Boyle’s law. Similarly, when V (volume) is constant, the equation resembles with the statement of Charles’s law (Bueche, F. 194). That is why when water boils, it produces steam and if it is not allowed to escape, pressure increases inside the cooker and results in higher temperature than possible normal conditions. The super-heated steam which is produced by high temperature makes the food cookShow MoreRelatedThe Existence Of Life And Energy1492 Words   |  6 Pagesbe a simple theory that had no impact on everything on the face of the earth. Energy is a part of what makes up the universe. The other part is matter, anything that takes up space and has mass. Energy is basically the capacity to do work, as per physics, and can be separated into two main forms: potential and kinetic. Potential energy is energy that is stored in everything around us, such as pencils, plants, and rocks. Interaction from another item is needed to release the potential energy in theseRead MoreInvestigatory Project3204 Words   |  13 PagesDioxide and living things 801. Homeopathy principles, facts and fictions PHYSICS   1. Fire and Burning- what factors affect burning?  (Quick) [Exp] 2. Fuels and their efficiency in producing energy. [Exp] 3. Musical instruments- the scientific principles behind them   [Exp] 4. Music Versus Noise- difference 5. Pendulums- how can a period of a pendulum be increased?   (Quick) [Exp] 6. Air Pressure (Code=IP050) - Water Pressure (Code=IP051) 7. How do you establish elevation from sea level? 8. Gears-Read MoreCelebrity Endorsements19810 Words   |  80 Pagesendorsements in advertising in India. Hindi film and TV stars as well as sportspersons began encroaching on a territory that was, until then, the exclusive domain of models. There was a spurt of advertising, featuring stars like Tabassum (Prestige pressure cookers), Jalal Agha (Pan Parag), Kapil Dev (Palmolive Shaving Cream) and Sunil Gavaskar (Dinesh Suitings). Of course, probably the first ad to cash in on star power in a strategic, long-term, mission statement kind of way was for Lux soap, a brand whichRead MoreFrench Terms for Ib Sl French B8316 Words   |  34 Pagessommeil sonner sonnette sourire surveiller tondeuse tondre vide to sit down to be wrong to bathe / to have a bath bath (tub) bath brush to brush to get changed lying down / in bed to lie down / go to bed to cook / to bake cooking, kitchen / chef, cook cooker / stove to clear away to go down / get off, out / to stay at to relax to sleep / dormitory shower / to shower asleep to go to sleep to keep / look after to dress inhabitant / to live introduce to wash to get up / stand up to read to put to set theRead MoreW1 Active Adj14109 Words   |  57 PagesW3 contract n S1, W1 contrast n W2 contribute v S3, W2 contribution n S2, W2 control n S1, W1 control v S2, W1 convenient adj S3 convention n W2 conventional adj W3 conversation n S1, W2 convert v W3 conviction n W3 convince v S3, W3 cook v S1, W3 cooker n S3 cookie n S3, W3 cool adj S2, W3 cool v S2 cooperation n S3, W3 cope v S2, W3 copy n S1, W2 copy v S2 core n W3 corn n S3 corner n S1, W2 correct adj S1, W2 correct v S3 corridor n S3, W3 cost n S1, W1 cost v S1, W2 cottage n S3, W3 cotton n W3Re ad MoreIgbo Dictionary129408 Words   |  518 PagesA. plentifulness; increase B. wealth; riches (cf. à  kà ¹Ã¯â‚¬ ¥) shout at; rebuke; chide; scold scold, etc.: á »Å' bà  Ãƒ  là ¬Ã¯â‚¬ ¬ yà   mÌ€ ba He scolded him peel (with knife) á »Å' nà  -à  ba jÄ « He is peeling yams peel completely break (under pressure); burst (as of weak clay pot with water in it being broken by pressure of the water; of fufu balls breaking in the pot during boiling): ÃÅ'tà ¨ afà ¹Ã¯â‚¬ ¥ akÄ rá »  aka, á »  gà  -à  ba mà   á »â€¹ tanye mmÄ «li n’imÄ“ ya That pot is not strong; it will break if you pour water into it breaking be (doing something);