Should fluorine be added to water? Introduction: Fluoride is a natural mineral and a chemical‚ which is a compound of fluorine that is the most commonly used in water sources. However not only for that‚ it also has a various number of other uses in example: making molten metals flow‚ and burning materials etc. as it is an extremely reactive and highly toxic element‚ so when it comes to adding fluoride to public water‚ that’s when mankind is faced with some extremely
Premium Drinking water Water purification Water
Announcement Subject | Week 7 Announcement | Saved By | Bryan Jensen | Date | Feb 18‚ 2013 12:00 am | Groups | site | Message Week 7 Assignment(s) Include: a) Answer online Week 7 Forum Question: (2%) i. Research a few of the proposed changes to SMTP and DNS that are designed to reduce or eliminate SPAM. Simple Mail Transfer Protocol (SMTP) is responsible solely for sending e-mail messages. In Linux/UNIX‚ the send mail program activates in response to a command and sends the requested
Premium Water Drinking water Overfishing
Culture of Sri Lanka From Wikipedia‚ the free encyclopedia This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (February 2010) Life in Sri Lanka Culture[show] Economy[show] Society[show] Government[show] Policies[show] v t e Ceylon Tea The culture of Sri Lanka has been influenced by many factors‚ but has managed to retain much of its ancient aspects
Free Sri Lanka
Structure of Matter | | 1. | An element consists of three isotopes in the relative abundance given below. What is the atomic mass of this element? | | 30.00% = 40.00 amu50.00% = 41.00 amu20.00% = 42.00 amu | | (A) | 40.90 | | (B) | 41.00 | | (C) | 41.90 | | (D) | 42.20 | | (E) | 42.90 | | | 2. | The total number of electrons that can be accommodated in the fourth principal energy level is _____ | | (A) | 2 | | (B) | 8 | | (C) | 18 | | (D) | 32 | | (E)
Premium Chemical element Oxygen Atom
frrdtrtads roam from place to place in search for pasture and moving with the season. Semi-nomads graze their small live stock near the fields of the settlements‚ often trading for goods obtained elsewhere and having all kinds of other interactions. This characteristic is still present in the Near East today. Nomads leave little archeological trace and are illiterate‚ so not much is known about them by direct means. However‚ some description does appear in written form: recorded by the Sumerians
Premium Sumer Mesopotamia
CBSE PMT – 2007 SCREENING PHYSICS 7. In the following circuit‚ the output Y for all 1. The primary and secondary coil of a transformer have 50 and 1500 turns respectively. If the magnetic flux φ linked with the primary coil is given by φ = φ0 + 4t‚ where φ is in webers‚ t is time in seconds and φ0 is a constant‚ the output voltage across the secondary coil is (a) 120 volts (b) 220 volts (c) 30 volts (d) 90 volts A beam of electron passes undeflected through mutually perpendicular electric and magnetic
Premium Magnetic field DNA
Kevin Li Mrs. Baldwin Honors Chemistry 3 November 2012 Historical Development of Atomic Structure Over the many years of the world’s history‚ there have been numerous developments and discoveries pertaining to atomic structure. Each of these breakthroughs gradually led us—step by step—to a deeper understanding of what makes up each and every atom. Because of this‚ our perception of an atom’s structure today is vastly different from the first idea of an atom’s structure from many centuries
Free Atom Electron
Abstract Man and woman are the two parts of a whole. One is incomplete without the other. The need of the one for the other is so great that it was honored even in Heaven when Eve was created for Adam. In the days before Islam‚ women were treated like slaves or property. Their personal consent concerning anything related to their well-being was considered unimportant and unnecessary to such an extent that they were never even treated as a party to a marriage contract. Islam brought a new lease of
Free Muhammad Islam Pakistan
1. The International Convention about wildlife protection is: Convention on Biological Diversity Convention on International Trade in Endangered Species‚ CITES Framework Convention on Climate Change Convention on Ozone Layer Protection Convention on Combat Desertification 2. The International Convention on control of persistent organic pollutants is: Stockholm convention Montreal protocol Convention on Biodiversity Kyoto protocol Convention on Combat Desertification 3. The International
Premium Ecology Biology
FOREIGN EXCHANGE PERFORMANCE AND BANK’S PROFITABILITY: AN EVALUATION OF NATIONAL BANK LIMITED‚ NORTH BROOKHALL ROAD BRANCH BY SHUBHA PRASHED CHAKRABORTY ROLL NO: 105248 DEPARTMENT OF FINANCE JAGANNATH UNIVERSITY HAS BEEN APPROVED IN MAY 2014 BY MD. OMAR FARQUE ASSISTANT PROFESSOR DEPARTMENT OF FINANCE JAGANNATH UNIVERSITY‚ BANGLADESH Declaration: I hereby declare that‚ this report contains no material which has been accepted
Premium Foreign exchange market Central bank