Here’s an excellent video presentation of the Sulfur Cycle by Gian Manuel.
Yes. You read that correctly. Bio – life; Geo – pertaining to the earth; Chemistry – structures, properties, and related changes. You also understood what biogeochemistry is about if it sounds like the term refers to bits of many things that are vital to life on our planet. Let’s take a closer look at the […]
The capability to magnify objects by a factor of up to one million was made possible with the invention of the first transmission electron microscope (TEM) by German scientists Ernst Ruska and Max Knoll in 1931.With the TEM, it was finally possible to view things at the molecular level. Studies were made of the proteins that make up the human body. Metals were also studied. The TEM made all of this possible by focusing a beam of electrons to pass through an object, rather than by focusing light on the object as was done with traditional microscopes. Particles smaller than 200 nm were able to be viewed.
You can tell a lot about an element from its position on the Periodic Table. In fact, the periodic table is designed to make information about the chemical properties of an element readily available. So all you need is the periodic table. Right? Not exactly. The periodic table tells you all about an element at the conventional scale. When you’re looking at an element at the nanoscale, things can change.
In 1644, Evangelista Toricelli wrote, “We live submerged at the bottom of an ocean of air.” We don’t fee the force of the pressure of this fluid any more than aquatic creatures feel the force of the water on all sides. Why? Because there is a uniformity of pressure in both cases; gravity exerts pressure on all sides.
A model basin is a structure designed for the testing of scale model vessels. In practice, it can be used to test the design of anything that utilizes hydrodynamics before it is built in full scale. What that means, is that a 6 foot model of a ship form can be tested under a variety of conditions before construction of a full sized vessel is undertaken.