Neon By: Ariana Neon was discovered by Morris Traver‚ and William Ramsay in 1898. Neon is a gas that produces a colored glow when excited by electricity passing through a glass tube in which the glass is confined. But you may wonder how are these neon lights even made? Well‚ the Neons gas is inserted into glass tubing using a thin pipe then the pipe is quickly removed‚ and the glass is fused at the end. The neon tube produces the light when an electrical current bombards the gas atoms with electrons
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Scandium is an element on the periodic table. Its atomic number is 21. Its atomic symbol is Sc. It has a silvery white color. It is classified as a metallic. Its group on the periodic table is 3. Its atomic mass is 45. Its melting point is 1541 Celsius. Its boiling point is 2836 Celsius. Its atomic is 216 pm. These a really interesting element. Scandium was discovered in Scandinavia in 1878. It was discovered by a man named Nilson. There is two metals that scandium has that were only found in Scandinavia
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In today’s world where technology and advancements has flourished‚ majority comes to one main source to run on… Energy. There is several alternative methods on producing energy‚ some more efficient or safer than others. The most common and traditional source of energy in today’s world is coal power‚ but other alternatives do exist such as that of natural gas‚ solar‚ wind‚ hydroelectric and nuclear energy. Nuclear energy is the 3rd most common source of our energy. Nuclear energy was first introduced
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® keep it simple science HSC Physics Option Topic From QUANTA to QUARKS What is this topic about? To keep it as simple as possible‚ (K.I.S.S.) this topic involves the study of: 1. RUTHERFORD & BOHR MODELS OF THE ATOM 2. DE BROGLIE & MATTER WAVES 3. INTO THE NUCLEUS 4. APPLICATIONS OF NUCLEAR PHYSICS ...all in the context of the history‚ nature and practice of Physics. 1. RUTHERFORD & BOHR MODELS OF THE ATOM What Has Gone Before... The Rutherford Model of the Atom The entire
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Episode 515: The radioactive decay formula Here‚ the key idea is the random nature of the decay. Avoid simply pulling pull equations out of the air – at least make them plausible. Summary Discussion: The meaning of the decay constant λ. (15 minutes) Discussion: The link with half-life. (15 minutes) Student experiments: Analogue experiments linking probability with decay rates. (20 minutes) Discussion: The meaning of the decay constant λ. Start from the definition
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Ernest Rutherford’s experiment was that he took a piece of gold foil and shot helium atoms at it. In theory they should have rebounded off of the gold foil because scientists at that time believed that the atom was a solid sphere‚ but what actually happened was that most of the atoms went through the gold foil.This showed that the atom wasn’t just a solid sphere like they believed but actually had a nucleus with electrons surrounding it. In 1897‚ a British physicist named J. J. Thomson discovered
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1 T 2.065 from table 6.3 so f 0.484 We will use t d t dM (1 f ) and t dM from table 7.1 t dM‚D2O 4.3e 2; t dM‚Be 3.9e 3; t dM‚C 0.017 Then‚ t d‚D2O =0.022188sec;t d‚Be =2.0124e-3sec;t d‚C 8.772e 3sec 7.5 One‐delayed‐neutron group reactivity equation; lp 1 lp where 0.0065; 0.1sec1 1 lp For lp 0.0sec For lp 0.0001sec For lp 0.001sec Note:In this question examine the figure 7.2 and see that to give a constant
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black holes are formed from neutron stars after the supernova explosions of big stars. When a supernova explosion of a very massive star takes place‚ then the gaseous matter present in the outer shell (or envelope) of the star is scattered into space but the core of the star survives during supernova explosion. This heavy core of the supernova star continues to contract (shrink) and becomes a neutron star. The fate of this neutron star depends on its mass. If the neutron star is very heavy‚ then
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The Study of Celestial Objects When we were born‚ we did not know how vast the world really is‚ we were convinced that this Earth was the center‚ the only place in this world. However‚ growing up we come to accept that Earth is just a piece of the infinite universe‚ and one might even say Earth is not even an atom compared to the cosmos. It took humans thousands of years to discover the reaches of the Earth‚ we finally were able to capture the whole planet and create a map of Earth. Yet the universe
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The gender stereotypes portrayed in children’s and adolescences media seem to show less in programming than in advertising. I decided to watch the Disney Channel and Nickelodeon for my Media observations because they hosted such popular shows as Sponge Bob –Square-Pants‚ iCarly‚ Hannah Montana‚ etc. I choose these popular shows for their large audience‚ and wanted to see what kind of Media the majority of America’s youth was sucking in. Using the social learning theory for gender development
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