Michio Kaku | Professor of Theoretical Physics, CUNY. 10 Strange Things About The Universe. Space The universe can be a very strange place. While groundbreaking ideas such as quantum theory, relativity and even the Earth going around the Sun might be commonly accepted now, science still continues to show that the universe contains things you might find it difficult to believe, and even more difficult to get your head around. Theoretically, the lowest temperature that can be achieved is absolute zero, exactly ? 273.15°C, where the motion of all particles stops completely. However, you can never actually cool something to this temperature because, in quantum mechanics, every particle has a minimum energy, called “zero-point energy,” which you cannot get below.
Remarkably, this minimum energy doesn’t just apply to particles, but to any vacuum, whose energy is called “vacuum energy.” One prediction of Einstein’s theory of general relativity is that when a large object moves, it drags the space-time around it, causing nearby objects to be pulled along as well. Dan Dennett on our consciousness. Online | How-To: Fingertip heart rate monitor. Beau Lotto: Optical illusions show how we see. A Lightning Bolt Hits Water, So Close You Can See Its Streamers. A bolt of lightning, 40 metres away (©Francis Schaefers and Daniel Burger) It’s pictures like these that make me a) want to do more photography, b) feel more in awe of nature than I already am, and c) wonder how the photographer didn’t pack up his gear and run away screaming.
But thank goodness the talented storm chasers didn’t run away, they actually witnessed a very rare event, up close. This astounding image was shot by photographers Francis Schaefers and Daniel Burger when they were chasing a thunderstorm along a beach in Vlissingen, the Netherlands. Chasing a storm along a beach. The best bit of the SpaceWeather.com article comes right at the end, where it says that Schaefers and Burger took a series of shots from “underneath a balcony where they figured the lightning wouldn’t reach.” Let me emphasise that last bit: underneath a balcony. Balls of steel comes to mind. Related Lightning Articles: Anyway, back to why this image is so fantastic. Streamers reach upward from the water. Drop of water at 2,000 frames per second. Terminator is not fiction, its here, its happening, now. | Brijux. ArXiv.org e-Print archive.
Clearing the Smoke: The Science of Cannabis | MontanaPBS Presents | PBS Video. Download Graphic Images from the Hillis/Bull Lab. Return to "Download Files" Page You are welcome to download the following graphic image of the Tree of Life for non-commercial, educational purposes: Tree of Life (~3,000 species, based on rRNA sequences) (pdf, 368 KB) (see Science, 2003, 300:1692-1697) This file can be printed as a wall poster.
Printing at least 54" wide is recommended. (If you would prefer a simplified version with common names, please see below.) Blueprint shops and other places with large format printers can print this file for you. Tree of Life tattoo, courtesy of Clare D'Alberto, who is working on her Ph.D. in biology at the University of Melbourne.
Here is another great Tree of Life tattoo! Cover of Molecular Systmatics, 2nd ed Here is yet another version from Hannah Udelll at the University of Wisconson-Madisson. From the exhibit Massive Change:The Future of Global Design: Here is a version modified by artist Carol Ballenger, commissioned by a hospital: This figure has been printed and used in many places. IBM Researchers Create Device Which Uses Light for Communication Between... Teen's invention makes solar panels 40% more efficient. Mark Roth: Suspended animation is within our grasp. Michael Pawlyn: Using nature's genius in architecture. Making Fire Balls. Lesson Plan for Making a Speaker Laboratory.
©1995 The Regents of the University of California by Regan Lum Introduction: A speaker is a device that converts an electronic signal into sound. The speaker you will build (see figure 1) consists of a Styrofoam or paper cup, a coil of wire, a permanent magnet, and a signal source. The electronic signal goes through the coil and creates a varying electromagnet. Figure 1 Purpose: In this laboratory, you will explore how a speaker works. Materials: 1 permanent magnet 2 feet of wire 1 pencil tape or glue 1 Styrofoam or paper cup 1 signal source (tape player) 1 plug with alligator clips for tape player Procedure: Assemble material as shown in figure 1. Leaving about 10 centimeters on the end, wrap the wire around a pencil to make a wire coil and tape or glue it to the bottom of the cup. Conclusion Does the volume control on the tape player work on your speaker? Return to CEA Science Education Home Page. GTEMPS.gif (800×575)
Amazing Electron Microscope Shots... - melodymaker's posterous. Scirus - for scientific information. 016.jpg (1000×682)