tag:blogger.com,1999:blog-30927959905861791922024-02-18T19:51:34.619-08:00DucDuchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.comBlogger76125tag:blogger.com,1999:blog-3092795990586179192.post-37978883297212757532013-04-05T13:02:00.000-07:002013-04-05T13:09:03.211-07:00Heat of Hydration in Concrete Mixture<div class="MsoNormal">
for aqueous ionic solutions, </div>
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• Solvent attractive forces and Mixing forces are </div>
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combined into a term called the heat of hydration</div>
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∆Hsolvent + ∆Hmix = ∆hhydration</div>
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<span style="mso-spacerun: yes;"> </span>attractive forces in water = H-bonds</div>
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<span style="mso-spacerun: yes;"> </span>attractive forces between ion and water = ion-dipole</div>
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<span style="mso-spacerun: yes;"> </span>∆Hhydration = heat released when 1 mole of gaseous ions </div>
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dissolves in water</div>
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<span style="mso-spacerun: yes;"> </span>∆Hsolute = - ∆Hlatic</div>
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<b><span style="color: black; font-size: 13.5pt;">Heat of Hydration</span></b><span style="color: black; font-size: 13.5pt;"><o:p></o:p></span><br />
<span style="color: black; font-size: 13.5pt;">The term ‘heat of hydration’ is applied to the heat generated by the chemical reactions, which occur in setting concrete between the water and cement. The heat causes the concrete first to expand and then to shrink as it cools. If there is a temperature gradient across the concrete or the concrete is otherwise restrained, cracking may occur. The two factors, which are most likely to cause excessive generation of heat, are very large pours and high cement contents. Some specifications set a<span class="apple-converted-space"> </span><a href="http://www.logicsphere.com/products/firstmix/hlp/html/dura4uqs.htm">maximum cement content</a><span class="apple-converted-space"> </span>in order to limit the generation of heat.<o:p></o:p></span>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-59745834658003368692013-04-05T12:43:00.001-07:002013-04-05T12:43:15.836-07:00erfc<a href="http://office.microsoft.com/en-us/excel-help/erfc-HP005209078.aspx">http://office.microsoft.com/en-us/excel-help/erfc-HP005209078.aspx</a><br />
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Doing some note taking on erfc for Water Resource Engineer home work assignment.Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-7070316499967647452013-02-01T12:30:00.002-08:002013-02-01T12:30:17.808-08:00Khan Academy Fluids Videos<a href="https://www.khanacademy.org/science/physics/fluids/v/fluids--part-1">https://www.khanacademy.org/science/physics/fluids/v/fluids--part-1</a>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-46528713048461142352013-02-01T10:50:00.001-08:002013-02-01T10:51:07.188-08:00Buckingham Pi Theorem<iframe allowfullscreen="" frameborder="0" height="315" src="http://www.youtube.com/embed/aN9rC65byCk" width="420"></iframe>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-76619484107927272182013-01-28T23:56:00.001-08:002013-01-28T23:57:10.598-08:00Concrete Waffle<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyW1tTROY9bwypD-uv8IXgGfFo0uAX7m8xZH3pciFkjWktNqme7lY5OQNM3bDENmp09odILxnFx1ILqNZytwKENmpFvjS3MZR5UO77Rb15XTHl0dZ_gMhv41dPxhaC9KzbIEFrzKfijHX5/s1600/IMG_0413.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="239" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyW1tTROY9bwypD-uv8IXgGfFo0uAX7m8xZH3pciFkjWktNqme7lY5OQNM3bDENmp09odILxnFx1ILqNZytwKENmpFvjS3MZR5UO77Rb15XTHl0dZ_gMhv41dPxhaC9KzbIEFrzKfijHX5/s320/IMG_0413.JPG" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhMwkyHN9O4orpJr6AgLMFwAtXWcITwyWn61Pmfmte39pNn_XcZ5bIk-O5oHTeZYkxhikolAdG7DSN5nGwx7j4pwQIuB4lnkyD4bDhIHyJIm9KOnITco7sAtSOigOczi5FavitXnpnJN772/s1600/IMG_0410.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="239" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhMwkyHN9O4orpJr6AgLMFwAtXWcITwyWn61Pmfmte39pNn_XcZ5bIk-O5oHTeZYkxhikolAdG7DSN5nGwx7j4pwQIuB4lnkyD4bDhIHyJIm9KOnITco7sAtSOigOczi5FavitXnpnJN772/s320/IMG_0410.JPG" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEigG9pojg0eU4v9drhD7JvG9JpSYdfxomxY31uhFAXSwCaAFxEyeg0XzbFdUHaAiIYnH6Vte26SDzTifBJbtK7FqK4_MvaDzGSZLIOfNbCLp9a3JfOjrIreHeGeom73E4KGnZXJsnjXOmOk/s1600/IMG_0411.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="239" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEigG9pojg0eU4v9drhD7JvG9JpSYdfxomxY31uhFAXSwCaAFxEyeg0XzbFdUHaAiIYnH6Vte26SDzTifBJbtK7FqK4_MvaDzGSZLIOfNbCLp9a3JfOjrIreHeGeom73E4KGnZXJsnjXOmOk/s320/IMG_0411.JPG" width="320" /></a></div>
<br />Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-14452840363237653542013-01-25T14:11:00.001-08:002013-01-25T14:11:43.126-08:00Ponicarehttp://www.math.unl.edu/~mbrittenham2/ldt/poincare.htmlDuchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-76759634085741038542013-01-18T12:59:00.002-08:002013-01-18T13:00:39.969-08:00Hooke's Law<a href="http://www.goodreads.com/book/show/612352.The_Curious_Life_of_Robert_Hooke" style="float: left; padding-right: 20px;"><img alt="The Curious Life of Robert Hooke: The Man Who Measured London" border="0" src="http://d.gr-assets.com/books/1176316356m/612352.jpg" /></a><a href="http://www.goodreads.com/book/show/612352.The_Curious_Life_of_Robert_Hooke">The Curious Life of Robert Hooke: The Man Who Measured London</a> by <a href="http://www.goodreads.com/author/show/25667.Lisa_Jardine">Lisa Jardine</a><br />
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Why I want to read this book: First encounter Hooke's law in general physics class. We conducted experiments using springs and weights in parallel and in circuits. Then this same equation was inverse in circuitry for electricity and magnetism. Then in the strength of materials class his law for elastic material increased my interests. After picking up this book at the local library, I saw an article about a new material using Hooke's Law and principals to absorb the energy of exploding bomb. They have figured out how to make really thin clear membrane embedded in glass to create bullet proof glass using Hooke's Law. Hooke also dabbled in architecture helping Sir Christopher Wren build London after the Great Fires. <br />
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<a href="http://www.goodreads.com/review/list/55711-duc">View all my reviews</a>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-21834315783623807292012-10-26T12:59:00.000-07:002013-04-05T13:07:20.558-07:00Tensile Testing<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi3_Kr1oIoenoAMaCs2_JyGOHABdm3OQ0ta3DLJbo29hu5gATaxVyAHwy7DuMgetXmxkpkQzrv1I8ZGnAhkAbwdfdxKWTDYKlUR6f2rGmeHmlV4HyQLgXO5YWkZzn3tRh4U4zLqJNZqTFC0/s1600/tensile+testing.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="297" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi3_Kr1oIoenoAMaCs2_JyGOHABdm3OQ0ta3DLJbo29hu5gATaxVyAHwy7DuMgetXmxkpkQzrv1I8ZGnAhkAbwdfdxKWTDYKlUR6f2rGmeHmlV4HyQLgXO5YWkZzn3tRh4U4zLqJNZqTFC0/s400/tensile+testing.jpg" width="400" /></a></div>
Nike donated this machine to test tensile strength in fabrics. We used it in the Portland State University to stretch the coupons in tensile test. <br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhRK_sNW1bdgXVx3geD4W9fvyZrR6bYmcvX8uAx-mrmGfntxNAM1zsX-qY2pFJcHjj5Yc6a1e_0aa8MSu1zP4azk0AlNCLEF3d_MFt3YtZMlWW_YsMRw234eqV8bzuBAoaak_oBiadrWKu-/s1600/tensile+testing+coupon.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhRK_sNW1bdgXVx3geD4W9fvyZrR6bYmcvX8uAx-mrmGfntxNAM1zsX-qY2pFJcHjj5Yc6a1e_0aa8MSu1zP4azk0AlNCLEF3d_MFt3YtZMlWW_YsMRw234eqV8bzuBAoaak_oBiadrWKu-/s320/tensile+testing+coupon.jpg" width="239" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhsU5oaU9WI4dLjC6BP5w9G_60EdCK6XpBxy7xv1aOimW_bMPVQBAnmTzux2zTbGXUPQuBxbGLXIta-ypZ2FcsoUo3ZSyGh_SD3_Dqh5dT4xhWhFFAwccyOcKMDpN0sdD1LRPCjufjv7t73/s1600/tensile+testing+alum.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhsU5oaU9WI4dLjC6BP5w9G_60EdCK6XpBxy7xv1aOimW_bMPVQBAnmTzux2zTbGXUPQuBxbGLXIta-ypZ2FcsoUo3ZSyGh_SD3_Dqh5dT4xhWhFFAwccyOcKMDpN0sdD1LRPCjufjv7t73/s320/tensile+testing+alum.jpg" width="239" /> </a></div>
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Aluminum test coupons </div>
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Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0Unknown location.43.516688714055491 -112.58789100000001-29.949668285944512 82.177733999999987 90 52.646483999999987tag:blogger.com,1999:blog-3092795990586179192.post-29026672969142739282012-03-05T11:53:00.002-08:002012-03-05T11:53:18.892-08:00Bernoulli equation deq<a href="http://youtu.be/_7k_1nh51OM">http://youtu.be/_7k_1nh51OM</a>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-41624195338941554232011-12-23T11:37:00.000-08:002011-12-23T11:37:31.541-08:00Menelaus of AlexandriaSome Notes on Menelaus.<br />
His work on spherical geometry furthers into Non Euclidian Geometry. Geodesic, a straight line is a small segment of a large circle who has a center. Modern aviation, airplanes use this knowledge to fly. This is how commercial airplanes fly. (I learned this fact from a book call 'Is God a Mathematician'? <br />
Mathematician began to see fault in Euclid's geometry because of his proposition for Parallel line was long and clumsy. In spherical geometry, the parallel lines do not extend for ever in parallels. They come to a point. This is why there is a distinction between spherical geometry and plane geometry. Look at the globe. The meridian comes to a point at the North and South Poles.Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-51977170856372225462011-12-23T11:12:00.000-08:002011-12-23T11:18:30.230-08:00Michael Schultheis<a href="http://www.michaelschultheis.com/index.php?m=2">http://www.michaelschultheis.com</a><br />
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<a href="http://www.froelickgallery.com/Artwork-Detail.cfm?ArtistsID=261&NewID=11092">.froelick gallery bio</a><br />
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<a href="http://www.froelickgallery.com/Artwork-Detail.cfm?ArtistsID=261&NewID=11092">Gold Sail of Menelaus</a><br />
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<span class="Apple-style-span" style="font-family: 'arial narrow', Verdana; font-size: 16px;">"As humans, we have a fascinating capacity to visualize mathematics. Our analytical concepts can be visualized, written down in notation, and then shared as a logical and visual language for others. These creative issues from our minds are analytical expressions, and the visual process of rendering them is analytical expressionism. This is the world I explore while painting." -</span><span class="Apple-style-span" style="font-family: 'arial narrow', Verdana; font-size: 16px;"> </span><span class="Apple-style-span" style="font-family: 'arial narrow', Verdana; font-size: 16px;"><i>Michael Schultheis</i></span><br />
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<span class="Apple-style-span" style="color: #666666; font-family: Verdana, Geneva, Arial; font-size: 12px; line-height: 16px;">Likening his canvas to a chalkboard, Michael Schultheis creates paintings consisting of layers of mathematical notations and drawings that describe the form and motion of three-dimensional geometric shapes.</span><br />
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<div class="MsoNormal">Conics of Apollonius</div><div class="MsoNormal">Toriods</div><div class="MsoNormal">Harmonic Oscillations</div><div class="MsoNormal">Harmonic Quadrants</div><div class="MsoNormal">Parabolic Symmetries</div><div class="MsoNormal">Conic Symmetries</div><div class="MsoNormal">Cycloids</div>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-15608422823935492812011-06-14T11:46:00.000-07:002011-06-14T11:46:49.456-07:00Fedrico Saenz Recio<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgEjRqPGjlbOp3WHaulI6K0eYm06UEjJtLdpoX3sOxpEjIUmWXvkZSvZ3xG3DtrP6v4aECo733wD_J2ZCPxFligKNslQWVEuMqpDE4GwHbqUGZB4Zd7IjM4k9tLqe-Fn9S-3-WON0E77Iue/s1600/IMG_1143s.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320px" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgEjRqPGjlbOp3WHaulI6K0eYm06UEjJtLdpoX3sOxpEjIUmWXvkZSvZ3xG3DtrP6v4aECo733wD_J2ZCPxFligKNslQWVEuMqpDE4GwHbqUGZB4Zd7IjM4k9tLqe-Fn9S-3-WON0E77Iue/s320/IMG_1143s.jpg" t8="true" width="225px" /></a></div>federico saenz recio <br />
NATURE PROVIDES <br />
Acrylic graphite pastel on canvasDuchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-66281063043734933742011-06-14T11:41:00.000-07:002011-06-14T11:41:44.628-07:00Plane<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikNTJcmleLtsIFCasYFGXk6z-MVXJRh2ECqhttxZc6GNe9cCNTzQPg8ENA8ZSBV-xqakj0l1avtjZkx2PU195amzmmWMJDn_F63zWOGvwOAS7iSw0wng5giN6cz5PD_cmy74La4ESC4lnr/s1600/plane.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320px" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikNTJcmleLtsIFCasYFGXk6z-MVXJRh2ECqhttxZc6GNe9cCNTzQPg8ENA8ZSBV-xqakj0l1avtjZkx2PU195amzmmWMJDn_F63zWOGvwOAS7iSw0wng5giN6cz5PD_cmy74La4ESC4lnr/s320/plane.jpg" t8="true" width="320px" /></a></div>This looks like a Richard Sierra work. I like the balance. The vertices and the x y axis. The plane and vector geometry in this work. I like the equilibrium.Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-63653321709702004802011-06-14T11:39:00.000-07:002011-06-14T11:39:28.864-07:00Viollet-Le-Duc<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhSxOvujRlzXgo46B0VHg192UG-lFbpalj5MNJk3R59HvKxEuoH1j87cxjEr-F3XKHWw-PHRmwEiVzzvLyzTSHWw03s76-WMRARKbU45R2ptDmYDSMevHwO7GgYdbaDHxBR2-f0fLgw1Mev/s1600/viole+le+duc.jpg" imageanchor="1"><img border="0" height="400px" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhSxOvujRlzXgo46B0VHg192UG-lFbpalj5MNJk3R59HvKxEuoH1j87cxjEr-F3XKHWw-PHRmwEiVzzvLyzTSHWw03s76-WMRARKbU45R2ptDmYDSMevHwO7GgYdbaDHxBR2-f0fLgw1Mev/s400/viole+le+duc.jpg" width="245px" /></a></div><br />
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Timber-frame bartizan, as seen in Strasbourg (late XIV - XV century).<br />
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From Dictionnaire raisonné de l’architecture française du XIe au XVIe siècle (Reasoned dictionary of French architecture from the XIth to the XVIth century), vol. 7 by E. Viollet-Le-Duc. Paris, 1875.<br />
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(Source: archive.org)Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-78115358376127960202011-05-13T15:27:00.000-07:002011-05-13T15:27:19.599-07:00Anselm Keiffer water colors<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJeblqVtOA4Ax7rAR6uU-wLtS031qXoSMD5_OiQW4G23XHEkcrbpqbPn5nfbQxtkjRhDZ7grCs6E4FtQ7I5fOCUHEqUTNWRtXnszs7I1dDS9_S3a3__LzYrYiMocyES_T1GvYu4mmAXEaD/s1600/anselm+keiffer+parabola+5+.jpg" imageanchor="1" style=""><img border="0" height="335" width="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJeblqVtOA4Ax7rAR6uU-wLtS031qXoSMD5_OiQW4G23XHEkcrbpqbPn5nfbQxtkjRhDZ7grCs6E4FtQ7I5fOCUHEqUTNWRtXnszs7I1dDS9_S3a3__LzYrYiMocyES_T1GvYu4mmAXEaD/s400/anselm+keiffer+parabola+5+.jpg" /></a></div>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com1tag:blogger.com,1999:blog-3092795990586179192.post-60318807332059984582011-03-04T10:48:00.001-08:002011-03-04T10:48:59.476-08:00Cramer's Rule<iframe title="YouTube video player" width="480" height="390" src="http://www.youtube.com/embed/QNpj-gOXW9M" frameborder="0" allowfullscreen></iframe>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-11028193708191815452011-02-10T09:39:00.000-08:002011-02-10T09:39:44.728-08:00Be Bro-Mine ?<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgU7eH08tn_nuJqbXhTXq5G-cvugEN3ym_HOztUZVWYSWQLdBVe05HSdgQQraizTyacobI1LBSS1gLZGWZUgIzlMveFsmaJdIe42QrQw1fvw6SCliEDqtooGMflLTsJORPCv5tb-45ZQn9W/s1600/Beryllium+%25281%2529.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgU7eH08tn_nuJqbXhTXq5G-cvugEN3ym_HOztUZVWYSWQLdBVe05HSdgQQraizTyacobI1LBSS1gLZGWZUgIzlMveFsmaJdIe42QrQw1fvw6SCliEDqtooGMflLTsJORPCv5tb-45ZQn9W/s320/Beryllium+%25281%2529.jpg" width="320" /></a></div><br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhQrZntMk9vix4Wi7zPXO8sL64ziLLaX96pmC0O9yrl7iQBvc7-3gb-qKHjXCCFx1ax7_eeb4fbFZxxdXWfNz2XQqV1cPpVCxuHDZmNWU1IRSQMrHjr765fa8WqRZ7eQvQ2T34iiN4ZQzlz/s1600/bromine.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhQrZntMk9vix4Wi7zPXO8sL64ziLLaX96pmC0O9yrl7iQBvc7-3gb-qKHjXCCFx1ax7_eeb4fbFZxxdXWfNz2XQqV1cPpVCxuHDZmNWU1IRSQMrHjr765fa8WqRZ7eQvQ2T34iiN4ZQzlz/s320/bromine.png" width="292" /></a></div><span style="font-family: "Times New Roman"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-language: AR-SA; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: EN-US;"><br />
<!--[endif]--></span>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-87690395418593675622011-02-09T12:06:00.001-08:002013-04-05T13:02:34.525-07:00Heat of Hydration<div class="MsoNormal">
for aqueous ionic solutions, </div>
<div class="MsoNormal">
• Solvent attractive forces and Mixing forces are </div>
<div class="MsoNormal">
combined into a term called the heat of hydration</div>
<div class="MsoNormal">
∆Hsolvent + ∆Hmix = ∆hhydration</div>
<div class="MsoNormal">
attractive forces in water = H-bonds</div>
<div class="MsoNormal">
attractive forces between ion and water = ion-dipole</div>
<div class="MsoNormal">
∆Hhydration = heat released when 1 mole of gaseous ions </div>
<div class="MsoNormal">
dissolves in water</div>
<div class="MsoNormal">
∆Hsolute = - ∆Hlatic</div>
<div class="MsoNormal">
<br /></div>
<b><span style="color: black; font-size: 13.5pt;">Heat of Hydration</span></b><span style="color: black; font-size: 13.5pt;"><o:p></o:p></span><br />
<span style="color: black; font-size: 13.5pt;">The term ‘heat of hydration’ is applied to the heat generated by the chemical reactions, which occur in setting concrete between the water and cement. The heat causes the concrete first to expand and then to shrink as it cools. If there is a temperature gradient across the concrete or the concrete is otherwise restrained, cracking may occur. The two factors, which are most likely to cause excessive generation of heat, are very large pours and high cement contents. Some specifications set a<span class="apple-converted-space"> </span><a href="http://www.logicsphere.com/products/firstmix/hlp/html/dura4uqs.htm">maximum cement content</a><span class="apple-converted-space"> </span>in order to limit the generation of heat.<o:p></o:p></span><br />
<span style="color: black; font-size: 13.5pt;"><br />
</span><br />
<span style="color: black; font-size: 13.5pt;"><a href="http://www.cement.org/tech/pdfs/pl972.pdf">http://www.cement.org/tech/pdfs/pl972.pdf</a></span><br />
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<a href="http://myweb.dal.ca/mawhite/3303/supplementals/cementpaper.pdf">http://myweb.dal.ca/mawhite/3303/supplementals/cementpaper.pdf</a>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-5382309517236203962011-02-04T11:12:00.001-08:002011-02-04T11:21:50.858-08:00The black keys<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhSHf9V7-KB3_iHmsysEon-MuLvc_mCesk7mihf2GIXfNB98G859rFjmX2sjki_rqzPpcxvnuvXlTq2C_9oDybNjRIwCQDsmheLQLHyaNfkSZfen8LHg-f8sbK-VQnwv3ZWG2JlvxJ0QoFN/s1600/The_Black_Keys_-_Live_at_the_Crystal_Ballroom.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhSHf9V7-KB3_iHmsysEon-MuLvc_mCesk7mihf2GIXfNB98G859rFjmX2sjki_rqzPpcxvnuvXlTq2C_9oDybNjRIwCQDsmheLQLHyaNfkSZfen8LHg-f8sbK-VQnwv3ZWG2JlvxJ0QoFN/s320/The_Black_Keys_-_Live_at_the_Crystal_Ballroom.jpg" width="320" /></a><a href="http://www.amazon.com/Black-Keys-Live-Crystal-Ballroom/dp/B001HQ6ZC8?ie=UTF8&tag=dnl-20&link_code=btl&camp=213689&creative=392969" target="_blank">Black Keys Live at the Crystal Ballroom</a><img alt="" border="0" height="1" src="http://www.assoc-amazon.com/e/ir?t=dnl-20&l=btl&camp=213689&creative=392969&o=1&a=B001HQ6ZC8" style="border: none !important; margin: 0px !important; padding: 0px !important;" width="1" /></div>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-10804123652097886562011-02-04T10:35:00.000-08:002011-02-04T10:35:46.316-08:00Cloud<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPoeQuPsSgbOjZKIN9weRpk42qJjtj0mOIAFKwjTXBHUo1SXjVIPJmBmO0FuUPcolbqeYmvqFJTKp8xXziER0bGcHXcN0jTvIDzU0DJJC5k3FiHQvaoE34P0bjvAAczkRFt2pOpS4yGhFA/s1600/cloud1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="203" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPoeQuPsSgbOjZKIN9weRpk42qJjtj0mOIAFKwjTXBHUo1SXjVIPJmBmO0FuUPcolbqeYmvqFJTKp8xXziER0bGcHXcN0jTvIDzU0DJJC5k3FiHQvaoE34P0bjvAAczkRFt2pOpS4yGhFA/s320/cloud1.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgP8YeIXmESaAG_MkaQVzKnc4FZQn7xzNVan7ZWNVSjXmlQj6-5fChCZLv6eltF2DfyIGC8AWo2KPMwn2ceN9blzKvlo2hHcG820zL5QuvpJZHE9tFiS2FjsOdmGLAf7n-O1yFAcepjborg/s1600/water-phase-diagram.jpg" imageanchor="1"><img border="0" height="374" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgP8YeIXmESaAG_MkaQVzKnc4FZQn7xzNVan7ZWNVSjXmlQj6-5fChCZLv6eltF2DfyIGC8AWo2KPMwn2ceN9blzKvlo2hHcG820zL5QuvpJZHE9tFiS2FjsOdmGLAf7n-O1yFAcepjborg/s400/water-phase-diagram.jpg" width="400" /></a></div>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-11979975918551817822011-02-03T11:02:00.001-08:002011-02-03T11:02:06.216-08:00Gilbert Strang<iframe title="YouTube video player" width="480" height="390" src="http://www.youtube.com/embed/ZK3O402wf1c" frameborder="0" allowfullscreen></iframe>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-7132365439914658152011-02-01T10:27:00.001-08:002011-02-01T10:27:39.780-08:00Super Steam Heat can burn paper<iframe title="YouTube video player" class="youtube-player" type="text/html" width="480" height="390" src="http://www.youtube.com/embed/MLCoCIILV00" frameborder="0" allowFullScreen></iframe>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-25124203505261966922011-02-01T10:11:00.000-08:002011-02-01T10:11:14.360-08:00Decomposition of Hydrogen Peroxide<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-hwn9sDpwjfyesne7bkApH9sd5waEJKpPNKYgX-ocgkPAGlSTRz42BXVu3o9GbmH_7OweXp4E6GzWCoRkaJybxLsbxjzU7Ds9_ipQEgI0-2zMukSWkNykT4iiRjmobWOH7UUTBz1GayXO/s1600/decomp+h202.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-hwn9sDpwjfyesne7bkApH9sd5waEJKpPNKYgX-ocgkPAGlSTRz42BXVu3o9GbmH_7OweXp4E6GzWCoRkaJybxLsbxjzU7Ds9_ipQEgI0-2zMukSWkNykT4iiRjmobWOH7UUTBz1GayXO/s320/decomp+h202.jpg" width="320" /></a></div><span class="Apple-style-span" style="color: #333333; font-family: 'lucida grande', tahoma, verdana, arial, sans-serif; font-size: 11px; line-height: 15px;">This is a set up for Decomposition of Hydrogen Peroxide. H2O2. The yellow hexagon shape you see is an inverted graduated cylinder. It is filled with water. You may have played with a similar set up as a kid in a bath tub. If you invert a container in water, it does not lose any water in the cylinder. A syringe is filled with 3 ml of KI (Potassium Iodine. The tube is then inserted into the cylinder. The Erlenmeyer flask has a rubber stopper so it is air tight. One the syringe is injected into the flask that is filled with air, the reaction cause a release of gas which then travels through the tube and into the graduated cylinder. The gas displaces the water from the cylinder into the container.</span>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-30622037677414823472010-12-09T15:46:00.001-08:002010-12-09T15:46:44.459-08:00Conic<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4i2YO6ygk4Xrwg0GR5gPisIWQmusv3PL_MDO00Jp4x3lrYHohhaFTBBKv1PIT1lwA4Vt3vvJWO76rxhRfse_xrTTMZ2HySc4VgIsfMjJuD_GS9i0V28Z6kvZm3EVhlOC70f0y_4PnGVgM/s1600/338px-Table_of_Conics%252C_Cyclopaedia%252C_volume_1%252C_p_304%252C_1728.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4i2YO6ygk4Xrwg0GR5gPisIWQmusv3PL_MDO00Jp4x3lrYHohhaFTBBKv1PIT1lwA4Vt3vvJWO76rxhRfse_xrTTMZ2HySc4VgIsfMjJuD_GS9i0V28Z6kvZm3EVhlOC70f0y_4PnGVgM/s320/338px-Table_of_Conics%252C_Cyclopaedia%252C_volume_1%252C_p_304%252C_1728.jpg" width="180" /></a></div>from wikipediaDuchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0tag:blogger.com,1999:blog-3092795990586179192.post-59702320157487801322010-12-03T10:40:00.001-08:002010-12-03T10:40:49.496-08:00AREA CALCULATION<a href="http://www.tasonline.co.za/toolbox/area/parabola.htm">http://www.tasonline.co.za/toolbox/area/parabola.htm</a>Duchttp://www.blogger.com/profile/18107142737609955631noreply@blogger.com0