Percentage fraction table pdf download

The ancients used in on a large scale to extract alluvial gold from the sediment of rivers. The mercury dissolved the gold which could be reclaimed by distilling off the mercury. In the Americas, it was the Spanish conquerors who exploited the large deposits of cinnabar at Huancavelica in order to extract gold.

Although highly toxic, mercury had many uses, as in thermometers, but these are now strictly curtained. Atomic data. Glossary Common oxidation states The oxidation state of an atom is a measure of the degree of oxidation of an atom. Oxidation states and isotopes. Glossary Data for this section been provided by the British Geological Survey. Relative supply risk An integrated supply risk index from 1 very low risk to 10 very high risk. Recycling rate The percentage of a commodity which is recycled.

Substitutability The availability of suitable substitutes for a given commodity. Reserve distribution The percentage of the world reserves located in the country with the largest reserves. Political stability of top producer A percentile rank for the political stability of the top producing country, derived from World Bank governance indicators.

Political stability of top reserve holder A percentile rank for the political stability of the country with the largest reserves, derived from World Bank governance indicators. Supply risk. Relative supply risk 8. Young's modulus A measure of the stiffness of a substance. Shear modulus A measure of how difficult it is to deform a material. Bulk modulus A measure of how difficult it is to compress a substance. Vapour pressure A measure of the propensity of a substance to evaporate.

Pressure and temperature data — advanced. Listen to Mercury Podcast Transcript :. You're listening to Chemistry in its element brought to you by Chemistry World , the magazine of the Royal Society of Chemistry.

This week, we're exploring the link between mad hatters, mascara, the emperors of China and fishing floats; a strange combination you might say, but probably not as strange as this! Could a man walk across a swimming pool filled with mercury?

Don't ask me how the conversation had reached this point, but being surrounded by friends, who would, it is fair to say, describe themselves as science illiterate, I knew it was up to me, the token scientist around the table, to give the definitive answer.

Elemental mercury, a liquid at room temperature, is 13 times denser than water. Enough it turns out to support a man of average build and yes, if you type man sitting on mercury into Google, you'll quickly find a photograph, published in National Geographic of a man suited and booted, sat unaided, albeit a little nervously, on top of a tank of rippling mercury.

I've been unequivocally proved wrong, but within a fraction of a second, this feeling had been transformed to sheer amazement. Amazement not just at the fact that mercury was so dense it could support a man, but more pressingly that the man in question was very likely giving himself a lethal dose of mercury poisoning in one fatal pose.

Surely even in , this kind of activity was seen as an exceptionally bad idea. This of course was not the first time that man has been lowered in by mercury.

With its Greek name, hydrargyrum , literally meaning liquid silver it's perhaps unsurprising that for the last three millennia, civilizations have been transfixed, believing mercury held wondrous physical and spiritual properties, but often those who dabbled reached an unpleasant and mercurial end. The Romans were renowned for using it in cosmetics, often disfiguring their faces in the process.

The Egyptians were buried with it to illustrate their civilizations' mining prowess and the ancient Chinese drank lethal Mercury cocktails seeking eternal life and well-being. In deed, Chinese first emperor, Qin Shi Huang is said to have believed so strongly in the magical properties of Mercury that he died seeking immortality by coughing out Mercury and powdered jade, pick-me-up. His tomb yet to be fully unearthed is thought to be surrounded by great rivers of the element and guarded by the soldiers of the terracotta army.

Skipping forward to the 18 th Century and for the first time, psychological illnesses were attributed to mercury exposure. The madness of many millionaires was blamed on the extensive use of mercuric nitrate in the hat industry and the phrase m ad as a hatter was coined.

The link almost certainly inspired Lewis Carroll to dream up the Mad Hatter, although much debate hangs over whether he is in fact displaying the symptoms of mercury poisoning. From this point on, the hazards of mercury were well documented; but despite its toxicity, it continued to find many uses in everyday applications throughout the last century.

To forego reeling off a huge list of weird and wonderful uses for mercury, I would just briefly mention my personal favourite, fishing floats, used to maintain in an regular wobble on the water surface, the mercury float proves so alluring to fish that even now after its use has been globally banned, there is active research to find a replacement to do an equal job. It can still be found swirling around in dentistry, where it is used in amalgam fillings and it remains an important ingredient of many mascaras.

But both these sources of mercury are currently under threat. Even the humble thermometer is gradually being phased out to be replaced by alcohol filled digital or thermistor-based instruments. As for the man sitting on the vat of mercury, unfortunately I'm still waiting to hear back from National Geographic, for his sake though, we can only hope that he is living a long and healthy life and has not joined the long list of mercury's many victims.

Chemistry World 's Fred Campbell on the uses and abuses of element number 80, Quick silver, otherwise known as mercury. Here's a taste of what to look forward to next time. The first thing most people think about when this element is mentioned is barium enema or barium swallow, sickly memories often surface off the radiology clinic, where the nice nurse asked you, 'what flavour would you like, strawberry or banana'.

A hard act to swallow, you could say, but thankfully a very digestible account of barium. That's coming up with Adina Payton on next week's Chemistry in its element. I'm Chris Smith, thank you for listening and goodbye! Chemistry in its element is brought to you by the Royal Society of Chemistry and produced by thenakedscientists. There's more information and other episodes of Chemistry in its element on our website at chemistryworld.

Click here to view videos about Mercury. View videos about. Help Text. Learn Chemistry : Your single route to hundreds of free-to-access chemistry teaching resources. In this example, the goal is to work out the "percent of total" for each expense shown in the worksheet. The total Get percentage discount. In this example, the goal is to determine the percentage discount for each item shown in the table, given an original price and a sale price.

Following order of operations, Excel first calculates the difference between the values the actual change in sales then divides that result by the original, or "old" value to get the decimal value Calculate percent variance. In this example, the goal is to calculate the variance between a Forecast column C and Actual column D as a percentage.

Get original number from percent change. In this example, the goal is to calculate the "original" number when the current value and percentage change are known.

Cap percentage at specific amount. This formula uses the MIN function to make a decision that might otherwise be handled with the IF function. Although MIN is usually used to return the minimum value in a data set with many numbers, it also works fine for "lesser of the two" If you're using a form as a contract, or to gather personal or personal health info, or for some other purpose with legal implications, we recommend that you do your homework to ensure you are complying with applicable laws and that you consult an attorney before relying on any particular form.

Written agreements are important in detailing a specific transaction made between two or more parties. Despite not always being legally enforceable in a court of law, they can often prevent disputes. From partnership agreements to separation agreements, Jotform's selection of Agreement PDF Templates will guide you in creating a paper trail for any type of business agreement. Your formal agreements will automatically be saved as secure PDFs that can easily be downloaded, shared with all involved parties, or printed for future reference.

These ready-made templates are formatted to provide contact information, terms and conditions, and instructions to resolve conflicts. You can collect electronic signatures with Adobe Sign or DocuSign and accept payments with integrated gateways such as PayPal or Square. Also known as a payment contract or installment agreement, a payment agreement template is a document template that outlines all the details of a loan between a lender and borrower.

Give authorization and permission to an individual to manage your responsibilities by using this Limited Power of Attorney Form. This document can be sent to an email recipient via attachment. Delegate financial responsibilities to another person by giving them this Financial Power of Attorney Form. This PDF document will grant that individual the power to manage your finances. This Partnership Agreement PDF template contains the essential and most common provisions required in a partnership agreement including.

Use this sample to make quick partnership agreement documents. Create professional consulting contracts for clients with this free Consulting Agreement Template.

Instantly download, print, and share them as PDFs. Don't waste time constructing your own template for Employee Equipment Agreements. Use this Employee Equipment Agreement Template produced by Jotform and start letting your employees use your equipment right away! Protect the landlord and the tenant by using this legally-binding Short Term Rental Agreement template. This template contains all the information needed when renting a property.

Freelancers are self-employed or are employees of other companies. They often look after their own tax and national insurance contributions, and are not entitled to the same rights as employees of the company. Freelancers are known to be competent in the fields of expertise and enjoys working for himself with substantial amount of experience. Normally, freelancers may work for more than one employer and in each employer, the freelancer has a specific contract detailing the job description and the compensation that the freelancer will receive.

A formal contract is normally required and provided to the freelancer to protect both the rights and obligations of parties in the contract. By having a freelance contract in place, it ensures both parties know exactly what their relationship entails.

This freelance contract PDF template contains the common requirements that should contain in an agreement with a freelancer. This sponsorship proposal template helps you attract and convince your leads to be part of your event as a sponsor. It contains a front page, cover letter for the leads, company overview, information about the event and terms. This Non Disclosure Agreement PDF Template contains the information of the two parties involved and has a signature field for both parties.

This is a free NDA Sample that you can use for your organization. Download, print, or share them in a single click. Loan Agreement Template includes information on borrower, lender, loan, terms and conditions and a signature for both parties. This free loan agreement sample discusses the payment plan, late charges, collateral items, and loan default. This maintenance agreement template designed with Jotform PDF Editor is specifically meant for maintenance services purpose. The aim is to make it easier to store the terms of the agreement between two firms or company where one is a maintenance company.

Students should solve all the exercise questions of this chapter, which includes:. Exercise 6. The sixth chapter is squares and square roots. There are 7 exercises in this chapter and you have to practice them all. First, you have to learn about square numbers and the properties of square roots.

The next topic in this chapter will teach you how to find the square of a number. Learn about odd and even square numbers, learn their properties and square roots. The next topic in this chapter talks about how you can find the square root of a number by repeated subtraction. Learn the method and practice examples and questions related to this topic.

The 6 th topic in this chapter is finding the square root of a decimal, in this, you will learn how to find the square root of a decimal. Learn the steps and understand them properly. Practice a few examples related to this topic. The last topic in this chapter is estimating square root. Learn how to estimate a square root, and practice examples and questions related to it. This chapter is important and you have to prepare it properly.

Square and square roots hold 12 marks and both short and long questions will be asked from this chapter. This chapter is an advancement over the previous chapter as it introduces students to cubes and cube roots. Students get to learn the properties and patterns associated with the same as they go through the chapter.

To become thorough with the chapter, students are urged to solve all the exercises which include:. Exercise 7. The next chapter is cubes and cube roots. The first topic in this chapter is the cube and it is on how to find perfect cube numbers. Learn the application of perfect cubes and solve questions related to them.

Solve the exercise questions and examples to understand the topic better. Practice questions on perfect cubes also. The last topic in this chapter is the cube root of a number, first, learn the definition of a cube root, then practice how to find a cube root of a number. Go through the cubes and cube roots table. This chapter is comparatively smaller than the rest and it holds 6 marks. This does not mean that you can skip it. Practice and cover all the topics only then you can score well in the exam.

Another important topic in this chapter is the cube root by prime factorization method, as you can already understand that this topic is going to be about how you can find the cube root of a number by prime factorization. Practice examples and solve similar questions. Some examples of numbers are cube roots of , , , etc. This chapter on Comparing Quantities can prove to be very interesting for the students as they are made familiar with the concepts of percentages, discounts, sales, etc.

Students also get to learn how to calculate simple, compound interests, concepts that have profound uses in our lives. So make sure to practise all the 28 questions included in the exercises. Exercise 8. Topics Covered in Comparing Quantities are as Follows:. This chapter is fairly bigger but do not be discouraged as you can easily learn it.

There are 9 exercises in this chapter and you have to be thorough with each. You must also know that this chapter holds 16 marks thus, you have to prepare this chapter very thoroughly. The first topic in this chapter is percentage and ratios. Learn about percentage difference, percentage increase, and decrease, etc.

Practice and memorize the formulas and practice solving examples and questions. Learn how to convert fraction to a percentage, percentage vs per cent, etc. Practice the percentage tricks and try to solve questions by using them.

Practice questions related to ratios and revise the topic. Learn the formulas for profit and loss and their percentage, discount percentage, increase and decrease percentage. The next topic is compound interest.

Learn all the formulas and solve questions related to them. The topic of simple interest is another important topic and you must learn the related formulas and practice questions and examples.

The 8 th topic in this chapter is on rate compounded annually or half-yearly, this is an important topic and you must practice and solve questions related to it.

The last topic in this chapter is applications of compound interest formulas, so, learn the advantages and disadvantages. Solve as many questions and examples as possible and be very thorough with this chapter. Students in this chapter are brief about the various terms associated with Algebraic Expressions and Identities.

The concept of factors, coefficients, monomials, binomials, and polynomials have been explained and students are also taught how to perform various operations on them. Students need a thorough practice of all the exercise questions to solidify their grasp of this chapter in CBSE class 8 maths. Details of the questions included in this exercise are:. Exercise 9. The ninth chapter and one of the most important chapters in the class 8 maths is algebraic expression and identities.

In this chapter, there are 12 exercises and this chapter holds 12 marks. The first topic in this chapter is about expressions, you have to learn about the types of algebraic expressions and learn their formulas. Some of the important expressions that you must be attentive to are monomial, binomial, polynomial, and variable expressions.

Go through all the examples before solving the exercise questions. In the next topic, you have to learn about factors, coefficients, and terms. Another important topic in this chapter is the addition and subtraction of algebraic expressions. In this chapter, you will learn how to add and subtract algebraic expressions. Learn the methods properly and solve examples to get better clarity of the topic.

Following the 5 th topic, the 6 th topic is about the multiplication of algebraic expressions. You have to learn how to multiply algebraic expressions, their formulas, and the terms used. Next, you have to learn how to multiply monomial by a monomial and monomial by a polynomial, practice questions related to it. Exercise 11 is about standard identities, in this learn the conditions for the standard equation.

Learn all the types of standard identities and practice questions related to each identity. The last topic in this chapter is how to apply identities. Learn the method and practice exercise questions and examples. You have to put more emphasis on this chapter because it is a little lengthy. Students get to learn about the concept of 3D geometry and visualise solid shapes in different dimensions. The concepts of edges, faces and vertices are explained in this chapter and students are taught how to map a solid shape in the three dimensions.

This chapter requires rigorous practice and students should, thus, solve all the questions given in the exercise. Exercise