first_imgWILMINGTON, MA — The Wilmington-based Merrimack Valley A Cappella, a 45-member award-winning all-femaile a cappella chorus, is hosting a Young Women Singers Workshop this summer.Young women (ages 13-19) from Wilmington and surrounding communities are invited to participate. They’ll learn how to sing “Roar” and “Can You Feel The Love Tonight,” while receiving free vocal production coaching. Sheet music and and audio learning media will be provided.Workshops will take place on Thursday evenings —  June 20, June 27, July 11, and July 18 — from 7pm to 9pm at the Wilmington Arts Center (219 Middlesex Avenue). July 18 will include a performance for family and friends.RSVP to info@merrimackvalleychorus by May 30. A $15 deposit is required for learning materials. The deposit will be refunded upon completion of the workshop. Learn more HERE.Like Wilmington Apple on Facebook. Follow Wilmington Apple on Twitter. Follow Wilmington Apple on Instagram. Subscribe to Wilmington Apple’s daily email newsletter HERE. Got a comment, question, photo, press release, or news tip? Email wilmingtonapple@gmail.com.Share this:TwitterFacebookLike this:Like Loading… RelatedMerrimack Valley A Cappella To Perform At Wilmington Farmers Market On July 21In “Community”Wilmington-Based Merrimack Valley Chorus Is Looking For New MembersIn “Community”Wilmington’s Merrimack Valley Chorus Seeking New MembersIn “Community”last_img read more

first_img Journal information: Physical Review Letters More information: Experimental and Theoretical Evidence for Pressure-Induced Metallization in FeO with Rocksalt-Type Structure, Phys. Rev. Lett. 108, 026403 (2012) DOI:10.1103/PhysRevLett.108.026403AbstractElectrical conductivity of FeO was measured up to 141 GPa and 2480 K in a laser-heated diamond-anvil cell. The results show that rock-salt (B1) type structured FeO metallizes at around 70 GPa and 1900 K without any structural phase transition. We computed fully self-consistently the electronic structure and the electrical conductivity of B1 FeO as a function of pressure and temperature, and found that although insulating as expected at ambient condition, B1 FeO metallizes at high temperatures, consistent with experiments. The observed metallization is related to spin crossover.via Physics Synopsis Explore further (PhysOrg.com) — Scientists studying the rotation of the Earth have long known that our planet doesn’t have a perfect spin. Most believe this is due to the different types of materials that make up the core, mantle and crust, which all have different rates of spin causing inherent friction. Most models researchers have developed however agree that in order for the planet to wobble the way it does, the mantle would have to respond to the magnetic tug of the core. The problem with this though, is that the mantle is made mostly of rock, not metal, which means it’s not supposed to be conductive. A new kind of metal in the deep Earth Citation: Part of Earth’s mantle shown to be conductive under high pressure and temperatures (2012, January 20) retrieved 18 August 2019 from https://phys.org/news/2012-01-earth-mantle-shown-high-pressure.html © 2011 PhysOrg.com New research by a Kenji Ohta and his colleagues at Osaka University in Japan indicates they’ve found a possible explanation. As they describe in their paper published in Physical Review Letters, it appears that Wustite (FeO), believed to be one of the components that make up the Earth’s mantle, can be made to conduct electricity at high pressure and high temperatures.This new work by the team builds on findings from the 1980’s that showed that FeO becomes more conductive when exposed to shock waves. To find out if other conditions might cause the same outcome, the team placed a sample of FeO in a diamond anvil and heated it using a laser. As the experiment proceeded, they also measured the conductivity of the FeO sample.After heating the sample to 1600°C and applying 70 gigapascals of pressure, the team found the sample became as conductive as an average metal. They also noted it did so without any changes occurring to its structure.To find out if the same conductive properties would occur under more harsh conditions, comparable to those found inside the Earth, the team turned up the temperature to 2200°C while ratcheting up the pressure to 1.4 million atmospheres and found the same results. Such measurements suggest, the team theorizes, that the same conductive properties would likely hold under even more extreme conditions such as those found near the boundary between the mantle and the core.To better understand why FeO becomes conductive under high pressure and heat, the team did density and electrical conductivity tests as they relate to temperature and pressure and now believe that the metallization is related to spin crossover. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more