Reactions and Equations Science Why should a magnesium ribbon be cleaned before burning in air? Answer Magnesium is very reactive metal. When stored it reacts with oxygen to form a layer magnesium oxide on its surface. This layer of magnesium oxide is quite stable and prevents further reaction of magnesium with oxygen. The magnesium ribbon is cleaned by sand paper to remove this layer so that the underlying metal can be exposed into air. Question 2: Write the balanced equation for the following
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Contrary to many people’s thoughts about seasons‚ summer is not due to the Earth being closer to the sun and vice versa for winter (these differences are extremely small). The Earth moves around the sun anti-clockwise in an elliptical orbit‚ with one revolution representing a year (365.256 days). To complete the orbit‚ Earth travels at an approximate speed of 67‚000 miles an hour. While we are orbiting around the Sun‚ we are also rotating around an imaginary axis of the earth‚ with one revolution
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To solve a system of equations by addition or subtraction (or elimination)‚ you must eliminate one of the variables so that you could solve for one of the variables. First‚ in this equation‚ you must look for a way to eliminate a variable (line the equations up vertically and look to see if there are any numbers that are equal to each other). If there is lets say a –2y on the top equation and a –2y on the bottom equation you could subtract them and they would eliminate themselves by equaling zero
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Algebra I Chapter 5 Study Guide Writing Linear Equations Name ________________ Due: Tuesday‚ January 17 (Exam week) 100 points Writing Linear Equations in a Variety of Forms Using given information about a __________‚ you can write an ________________of the line in _____________ different forms. Complete the chart: Form (Name) Equation • • Important information The slope of the line is ____. The __ - ___________ of the line is _____. The slope of the line is _____. The line
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reason why the Drake Equation is not a successful science is because it would be impossible to calculate some of the elements in the equation. The elements would take too long to get an accurate sample to give a scientifically sound explanation. For instance how would you calculate fi (the fraction of intelligent life forms)‚ how do you define intelligent? Is intelligent like you and I‚ is it like a bird or a rat‚ could it be a plant? There is no way to truly determine what counts and doesn’t
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of operations is a rule to clarify confusion that may occur in an equation that has multiple different operations. This rule of Order of Operations states we must solve a complex equation by complete the operations in this order: Parenthesis‚ Exponents‚ Multiplication‚ Division‚ Addition‚ and Subtraction. We can remember this by this mnemonic: Pink‚ Eyes‚ May‚ Doubt‚ Anyone’s‚ Style. *** This will happen if we take this equation and NOT follow the Order of Operation*** 4+ 2 x 3 = If I did not
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Universal Studios Advisory Board Recommendations for the pursuit of the production of programming in partnership with WWE Recently‚ we at Universal Studios have been approached by Mattel Toys to begin working on the production of a children’s program with the intent of marketing its World Wrestling Entertainment (WWE) action figures to children for their economic gain. While there may also be the opportunity for monetary gain for Universal Studios in such production‚ there are several legal
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1.1. Equations and Graphs In each of problems 1 - 4‚ find (a) an ordered pair that is a solution of the equation‚ (b) the intercepts of the graph‚ and (c) determine if the graph has symmetry. 1. 2. 3. 4. 5. Once a car is driven off of the dealership lot‚ it loses a significant amount of its resale value. The graph below shows the depreciated value of a BMW versus that of a Chevy after years. Which of the following statements is the best conclusion about the data? a. You should
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Accounting Equations Paper ACC/300 Nakisha Susberry University of Phoenix Student 4/20/2013 The accounting equation is a formula that represents the relationship between the assets‚ liabilities‚ and owner ’s equity of a small business. Businesses use this to basically show what it owns what it owes and what its investors are investing. In order to understand these concepts it is important to have some knowledge of what is meant by each of the three basic components mentioned. “Assets
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Solving the quadratic equations using the FOIL method makes the equations easier for me to understand. The Foil method‚ multiplying the First‚ Outer‚ Inner and Last numbers‚ breaks down the equation a little further so you understand where some of your numbers are coming from‚ plus it helps me to check my work. Equation (a.) x^2 – 2x – 13 = 0 X^2 – 2x = 13 (step a) 4x^2 – 8x = 52 (step b‚ multiply by 4) 4x^2 – 8x + 4 = 52 + 4 (step c‚ add to both sides the square of original
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