remove creases. It is named for the metal of which the device is commonly made‚ and the use of it is generally called ironing. Ironing works by loosening the ties between the long chains of molecules that exist in polymer fiber materials. With the heat and the weight of the ironing plate‚ the fibers are stretched and the fabric maintains its new shape when cool. Some materials‚ such as cotton‚ require the use of water to loosen the intermolecular bonds. Many materials developed in the twentieth century
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Problelm 3.6 Given data: Thi := 250 °C Tci := 30 °C mh := 0.15 kg s mc := 0.6 kg s cph := 2000 J kg⋅ K cpc := 1000 J kg⋅ K U := 1000 W m K 2 Finding Heat Exchanger Area(A0): 2 Cc := mc⋅ cpc = 600 m ⋅ kg K⋅ s 3 Ch := mh⋅ cph = 300 m ⋅ kg K⋅ s 3 2 Tco := mh⋅ cph⋅ Thi + mc⋅ cpc⋅ Tci mh⋅ cph + mc⋅ cpc 4 = 103.333 °C Tho := Tco Q := Ch⋅ ( Thi − Tho) = 4.4 × 10 W Thi − Tco − ( Tho − Tci) Thi − Tco ln Tho − Tci Cc Ch Ch Cc ε0 := if ( Cc
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BENZOIC ACID & BENZOATES (210 –218) • Retards growth of bacteria and yeasts • Occurs naturally in many foods – a similar distribution to salicylate (but at a lower dose than as an additive) • Common food sources: Soft drink‚ cordial‚ fruit juice and cider Liquid essences and syrups Iceblocks‚ jelly‚ low joule jam‚ dips‚ pickles‚ olives Fish marinades and preserves • PABA (para-amino-benzoic-acid)
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The University of Sydney Aerospace‚ Mechanical and Mechatronic Engineering MECH3260 Thermal Engineering Heat Transfer Quiz 3 2007 Time: 40 minutes Answer ONE question only. Question 1 Consider the cylindrical receiver in a solar thermal power plant shown below. The receiver is made of opaque material and has a diameter D = 8m and length L = 14m. At a particular time‚ the heliostats direct a concentrated solar flux of q”S = 80 kW/m2
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Titration Lab How Much Citric Acid is in Your Soda? PURPOSE To determine the molarity (concentration) of citric acid (H3C6H5O7) in various different citrus flavored sodas. BACKGROUND PRINCIPLES Popular sodas all strive for a somewhat sour (’tart’) flavor and manufacturers utilize acids to impart this taste. While there are a vast variety of different brands of sodas on the market‚ they can be broken into two main categories: dark or clear. This differentiation is not only a simple color
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energy from the heat. When particles move faster‚ more frequent collisions will occur and the collisions are more violent. This should increase the reaction rate. This will result in the particles colliding more frequently and increasing the speed of the reaction. Also when they have more energy there will be more chance of the collisions being successful because the activation energy will be attainable. Hypothesis: In a reaction between calcium carbonate and hydrochloric acid‚ the products calcium
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Objective: To understand the importance of choosing suitable indicators for detecting the end points of acid-base titrations. To obtain titration curves some acid-base titrations. Materials and method: As shown in page 2 and 3 in General Chemistry practical manual 2011. Result: Part 1: Suitability of Indicators Strong acid-weak base titration Table I: Volume Titration Rough Accurate 1 Accurate 2 Final volume 0.00 14.65 0.00 Initial volume 35.20 48.00 33.50 Volume of
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Roles of Women Heat and Dust By Jude Bashto Heat and Dust is an enchanting novel written by Ruth Prawer Jhabvala‚ a distinguished novelist and screenwriter. The novel mainly explores the cultural shock that the narrator experiences while comparing it to the shock experienced by her step-grandmother some 25 years earlier. During the course of the novel the narrator continues to retrace her step-grandmother’s steps‚ and while doing so we find her following the same path and ultimately
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BASE ISOLATION: FRICTION PENDULUM SYSTEM SARNOT ANUP A.‚ JAIN KRUTIK P‚ CHOUDHARY JUNAID A‚ U.G.Students Department of Civil Engineering D.M.College of Engineering Sector-3‚ Airoli‚ New Mumbai- 400 708 Abstract: The Base Isolation is one of the passive control techniques to reduce the earthquake effect on the structure up to negligible level. Base isolation system are‚ Elastomeric Bearing‚ Sliding Isolation System and Combined Systems. Elastomeric bearing has a problem of tearing of rubber
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Choose a character from To Kill a Mockingbird‚ to write about. Here are some suggestions: *Scout Finch *Boo Radley *Atticus Finch *Jem Finch *Tom Robinson *Mayella Ewell *Dill Harris **Note…. All examples from In the Heat of the Night. Step 1 - Pre-Writing/Outline Brainstorm for several character traits‚ using the sheet(s) provided. Then‚ try to narrow down your search to THREE good traits. How do you pick the best three? Ask yourself the following
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