Home | Sciencelearn Hub. Printables from A to Z from Homeschool Creations - Homeschool Creations. The printables shared on this site are FREE of charge and you are welcome to download them for your personal and/or classroom use only. However, free or purchased printables are NOT to be reproduced, hosted, sold, or stored on any other website or electronic retrieval system {such as Scribd or Google docs}. My printables are copyright protected and I appreciate your help in keeping them that way. :) If you download and use some of my printables and then blog about them, please provide a link back to my blog and let me know ~ I’d love to see how you are using them!
Please be sure to link to the blog post or web page - and not directly to the file itself. Science Fair Project Ideas, Answers, & Tools. Biology Pictures: Circulatory System. Index of /content. Index of /content/chemical-bonding. Lle Chatelier principle. This law is known to every Chemistry student as the Le Châtelier principle . His original formulation was somewhat complicated, but a reasonably useful paraphrase of it reads as follows: Le Châtelier principle: If a system at equilibrium is subjected to a change of pressure, temperature, or the number of moles of a component, there will be a tendency for a net reaction in the direction that reduces the effect of this change.
To see how this works (and you must do so, as this is of such fundamental importance that you simply cannot do any meaningful chemistry without a thorough working understanding of this principle), look again at the hydrogen iodide dissociation reaction Consider an arbitrary mixture of these three components at equilibrium, and assume that we inject more hydrogen gas into the container. The following tabLe Contains several examples showing how changing the quantity of a reaction component can shift an established equilibrium. 2 NO2(g) → N2O4(g) More on marine sediments. Fish’s DNA May Explain How Fins Turned Into Feet. TD_5th_Volcanoes.pdf. What is electricity - Ausgrid. Sounds from Amplitude and Frequency. The Doppler Effect. Guide for Web - unit3.pdf. Reaction_concept_wksht.pdf. Chap24.pdf - chap24.pdf.
High speed video reveals the bizarre physics of an ordinary water droplet. The Scale of the Universe 2. The Eerie Glow of the Antarctic Aurora Illuminates the Continent, Seen from Space. The Sun may seem steady and calm to the eye, but in reality it’s anything but. Magnetic fields pierce the surface, barely constraining the dozens of millions of tons of ionized plasma that flow along them. These loops of magnetic force store vast amounts of energy, and if released, can explode with the force of millions of nuclear bombs. And when they do, that matter is hurled into space at speeds hundreds of even thousands of times faster than a rifle bullet. Screaming across the solar system, most of that material misses the Earth, such a small target we are. But sometimes the geometry is right, and that debris bears down on us. Slamming into the Earth’s own magnetic field, the interaction focuses the subatomic particles from the Sun to our poles, where they cascade down the geomagnetic field lines into our atmosphere.
The atoms and molecules in our air become energized by this gust of solar wind, causing them to glow. Image credit: NASA/NOAA/DoD/Jesse Allen & Robert Simmon. Chemicals, the Environment, and You. Chemicals - Manual - Lesson 5. At a Glance Overview Students apply their growing understanding of the concepts of toxicology (dose, response, individual susceptibility, potency, and threshold) to their discussion of the 1950s tragedy in Minamata, Japan.
They learn how to assess the risk of people to specific chemical hazards and make decisions about how to manage that risk. Major Concepts People can make some choices about chemical exposure; however, some exposure is controlled at a level other than an individual one. Objectives After completing this lesson, students will Background Information The Minamata Case Study When people living in Minamata, Japan, in the 1950s began slurring their speech occasionally or dropping their chopsticks at a meal, no one thought much of it. We now know the tragic story of Minamata. The consequences of such blatant polluting seem obvious to people today. Risk Assessment How a person is exposed to a chemical also determines the factor of risk. Managing Risk Notes about Lesson 5 In Advance 1. 2. Chemistry. Learn and research science, chemistry, biology, physics, math, astronomy, electronics, and much more. 101science.com is your scientific resource and internet science PORTAL to more than 20,000 science sites.
Get better grades, increase your knowledge, make your work easier, enjoy learning. All information on this site is FREE! This site is FREE. No sign up. CHEMISTRY TUTORIALS Free online chemistry tutorials Rader's Chemistry 4 Kids by Chem4Kids.com CHEM4KIDS - Chemistry Research destination Chemistry Tutorial by University of Arizona Review the basics of chemistry you'll need to know to study biology. General Chemistry Online - From Wikipedia, the free encyclopedia. Chemistry - Animations Online Marketing Training. Organic Chemistry Tutorials Gases. www.chemtutor.com A walk up the phase change graph. www.chemtutor.com The 'heat curve' or phase change graph for water. pH Charts - Excellant!! Basic Oxygen Steelmaking | BOS Simulation. In this simulation you will play the role of plant metallurgist in charge of the BOF operations. You will have to decide on scrap and addition materials, and the amount of hot metal to charge into the BOF to attain a target composition of the chosen steel grade and to tap within required time and temperature limits.
You should also aim to minimize the cost of the whole operation. This completes the current section. If necessary, please ensure that you have achieved the learning outcomes for this section: World Steel Association, MATTER and their partners are not responsible for the content of external sites. Chemistry of Hard and Soft Water. I'm sure you've heard the terms 'hard water' and 'soft water', but do you know what they mean? Is one type of water somehow better than the other? What type of water do you have? Let's take a look at the definitions of these terms and how they relate to water in everyday life. Hard water is any water containing an appreciable quantity of dissolved minerals. Soft water is treated water in which the only cation (positively charged ion) is sodium. The minerals in water give it a characteristic taste. Some natural mineral waters are highly sought for their flavor and the health benefits they may confer.
If soft water tastes bad, then why might you use a water softener? Hard water can be softened (have its minerals removed) by treating it with lime or by passing it over an ion exchange resin. Most of the ions have been removed in soft water, but sodium and various anions (negatively charged ions) still remain. Teachers' Online Primary Science. Soap and detergents This topic explores the fascinating world of soaps and how they clean dirt from clothes and food from dishes. This topic should be read in conjunction with the topics Like dissolves like and Talking solutions. What is dirt? Most dirt and food stains are composed of oils and other biological molecules, sometimes mixed with inert materials like sand. Like other non-polar molecules such as petrol, wax and grease, most food and dirt is not soluble in water.
Why won't water remove grease and dirt? Hence water is not very good at cleaning plates and clothes by itself. Soap and detergents - bridging the gap Soap and detergents are quite unique molecules with the ability to dissolve in both polar and non-polar solvents. This allows the soap and detergent molecules to bond with both oil and water molecules at the same time, forming a connection between the oil and the surrounding water molecules.
Dish washer powders - Warning! Teachers' Online Primary Science. HAZCHEM signs Dangerous goods are divided into classes based on the hazards they pose. All packages and containers, shipping containers, trucks, trains and tankers which carry dangerous goods must carry the correct "Class Label" in the form of a diamond shaped sign. This diamond sign shows the nature of the hazard posed by the dangerous substance by color, symbol and the class of the goods by number. The classification system The Australia labelling system has nine classes of dangerous goods with subsections according to the type of hazard applicable. Multiple signs may sometimes be required with mixed loads or certain types of chemicals. This is not meant as a comprehensive treatment of this subject, links to the HAZCHEM website are provided for more information.
As the classification indicates, these materials are capable of exploding. 2 Compressed gases Compressed gases are under pressure and hence could leak from a broken container, or explode if the container were in a fire. Water droplet bouncing on a superhydrophobic carbon nanotube array. Body Forces on Inclined Planes. Determine force required to move a body up on an inclined plane Neglecting the friction the force required to move a body up an inclined plane can be expressed with the formula Fp = W h / l = W sin α (1) where Fp = pulling force (N, lbf) W = m g = weight of body (N, lbf) h = elevation (m, ft) l = length (m, ft) α = elevation angle (degrees) m = mass of body (kg, slugs) g = acceleration of gravity = 9.81 (m/s2) = 32.174 (ft/s2) Adding friction (1) can be modified to Fp = W (sin α + μ cos α) (2) where μ = friction coefficient Example - Pulling Force on an Inclined Plane A body with mass 1000 kg is located on a 10 degrees inclined plane.
The pulling force without friction can be calculated as Fp = (1000 kg) (9.81 m/s2) sin(10o) Online Inclined Plane Force Calculator - SI Units The calculator below can be used to calculate required pulling force to move a body up an inclined plane. Online Inclined Plane Force Calculator - Imperial Units Angle of Repose Related Topics Related Documents. Mastering Physics Solutions: Pulling a Block on an Incline with Friction | Mastering Physics Solutions.
Pulling a Block on an Incline with Friction Part A = -24.5J Part B = 700J Part C = -24.5J Part D = 700J Solutions Below: A block of mass 1.00 kg sits on an inclined plane as shown. A force of magnitude 70.0N is pulling the block up the incline. The coefficient of kinetic friction between the plane and the block is 0.500. Part A What is the total work Wfric done on the block by the force of friction as the block moves a distance 10.0 m up the incline? Frictional force is the coefficient of friction times normal force: FF = μFN Find normal force first: FN = mgsin(θ) FN = 1.00(9.8)cos(60) FN = 4.9N Now solve for frictional force: FF = μFN FF = 0.500(4.9) FF = 2.45N Now solve for work using the formula W = fd: Wfric = fd Wfric = 2.45(10) Wfric = 24.5J Finally, since friction opposes the direction of motion, we know that the sign must be negative: Wfric -24.5J Part B What is the total work WF done on the block by the applied force F as the block moves a distance 10.0 m up the incline?
W = Fd WF = 70.0 * 10.0. SAT Physics: Kinematics. Inclined Plane Force Components | Inclined planes and friction. Science News, Research And Discussion. Scirus - for scientific information - StumbleUpon. School of Physics UNSW Research Page. FullBooks.com - Thousands of Full-Text Free Books - StumbleUpon.