…closed cup of saturated saltwater. Note: The measurement was done shortly after removing the seal. Hence the results can be regarded as approximately those of the sealed cup as the gradients will take a longer while to…
…How can we separate the two effects? Sealing the containers to stop evaporation doesn’t work because that will stop crystallization as well. Why do I insist on the theory of…
They just measured relativistic effects between two atomic clocks differing by the speed of a fast bike rider and on length scales shorter than two feet. Boy, this world is…
…plywood in no time flat. Here, you can see it doing a number on some MDF – 3D shapes very easily done. The price? Only about $5,000 for a starter…
…also provides a light-hearted, page-turning adventure. You can see a trailer for the book here: http://www.youtube.com/watch?v=QiJhpfnvk7o Teachers and students can get a taste of the land of Lexicon at www.LostinLexicon.com….
…these field effects. The model shows the flow of electrons, represented by the small circles with arrows that indicate their velocities around a negatively charged “island,” represented by the large…
…supports system thinking. But understanding the greenhouse effect is challenging. It is complex, involving different kinds of light and their interactions with gases, the earth, and clouds. Students must grapple…
…that usually take place over very long stretches of time. For a typical elementary student, this is a difficult concept. Figure 2. Students watch mountains grow and affect the environment….
…But hearing advocates hawk these as the promise of digital texts is like hearing Henry Ford rave about the advantages of time saved no longer shopping for buggy whips. Digital…
…by society as a whole…And we can see that organizations designed around a culture of generosity can achieve incredible effects without an enormous amount of cultural overhead This is true…