Test your engineering skills - Discover Engineering. Evolution MegaLab. Five Historic Female Mathematicians You Should Know. No one can know who was the first female mathematician, but Hypatia was certainly one of the earliest. She was the daughter of Theon, the last known member of the famed library of Alexandria, and followed his footsteps in the study of math and astronomy. She collaborated with her father on commentaries of classical mathematical works, translating them and incorporating explanatory notes, as well as creating commentaries of her own and teaching a succession of students from her home. Hypatia was also a philosopher, a follower of Neoplatonism, a belief system in which everything emanates from the One, and crowds listened to her public lectures about Plato and Aristotle.
Her popularity was her downfall, however. She became a convenient scapegoat in a political battle between her friend Orestes, the governor of Alexandria, and the city’s archbishop, Cyril, and was killed by a mob of Christian zealots. Ten Historic Female Scientists You Should Know. Why there is no such thing as empty space. MacGregor Campbell, contributor Could the universe have appeared out of nothing? In a previous video, we argued that typical notions of 'something' and 'nothing' don't really make sense according to modern physics. But many commenters objected to this idea, calling it a semantic game. Surely there must be such a thing as a true void: no matter, no energy, no distance... just pure nothingness. In our latest animated explainer, we pick up where we left off and look at whether true nothingness is possible according to physics.
You can find out more about the void in our full-length feature: Nothingness: The turbulent life of empty space. For more mind-bending physics, check out this explainer on how to build a time machine, or visit our archive of One-Minute Physics videos. Culture Vaults : Resonant Frequencies and the Human Brain. One of the great revelations of 20th century science is that all existence can be broken down into simple wave functions. Every photon, energy emission, and elementary particle rings with its own unique wave signature. When we see a color, we are actually seeing a distinct frequency of visible light.
When we hear a sound, our eardrums are actually being vibrated by subtle waves in the air molecules around us. Even the neurochemical processes of human consciousness our very thoughts ring with their own distinct wave patterns. By studying the way that waves interact with other waves, researchers have found that even low-powered oscillations can have enormous effects on standing waves, physical structures, and even the human brain. Tesla first realized the massive potential of resonant waves in 1898 when he performed a simple experiment with an electromechanical oscillator the size of an alarm clock.
"The principle cannot fail," Tesla would say. Monroe's Big Discovery The Neural Radio. Engineering. Chaîne de FlowScience FLOW-3D has many applications for the hydraulics industry, including modeling fish passages, dam breaks, spillways, avalanches, hydroelectric power and other water and environmental engineering challenges.Users can increase the capacity of existing infrastructure in hydropower plants, develop novel approaches to fish passages, design intakes that minimize head loss, develop improved forebay designs and tailrace flows, analyze scour and deposition and evaluate air entrainment. For more information about the many applications of FLOW-3D for the water & environmental industry, visit Fluid Structure Interaction Play FLOW-3D's Fluid Structure Interaction, Thermal Stress Evolution and General Moving Objects models simulates fluid-structure interaction in a variety of applications, from inkjets to metal casting.
FLOW-3D CFD Software Simulations FLOW-3D/MP v5 Video Tutorials. Test your engineering skills - Discover Engineering. PhET: Free online physics, chemistry, biology, earth science and math simulations. Electricity Explained - Animations and simulations to teach electricity. GCE ELECTRONIC CIRCUITS. AIM HETM. Virtual Machine Shop. EPE "Basic Soldering Guide" Types of Iron? The Art of Soldering "Cold Soldering" - better than a traditional iron?
Read our full review. Gas Soldering Iron review (legacy product) How to De-solder Desoldering Photo Gallery & Black Museum of Bad Soldering Electronics Soldering Guide Photo Gallery Gas Soldering Iron Review: Read how typical gas soldering irons work and see our full online view with photographs. (Legacy product.) More details..... "Cold Soldering" - a review of the Coldheat Classic Iron (legacy product), tested on a commercial electronic kit. This written guide will help beginners and novices to obtain effective results when soldering electronic components. Everyday Practical Electronics magazine contains the widest variety of interesting projects and information for beginners, trainees, hobbyists and professionals in electronics.
Please refer to the Copyright Notice appearing at the end. Soldering irons Topics in this section include: Voltage Wattage Temperature Control Soldering Stations Bits (Tips) Time.