How Much to Buy a 1921 One Penny Coin?

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In 1971 the British monetary system converted to decimals, and penny, pence and pounds are the coins available today. Before 1971, the penny, shilling and pence were the coins in use. The one-penny was a copper coin for years. A "copper" is a reference to an English penny coin, although the coin is

Four Classes of Macromolecules Important to Living Things

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Macromolecules are very large molecules that are composed of a number of atoms and smaller molecular structures. There are a number of different types of macromolecules, many of which are very useful or important to life. Plastics, rubber, and diamond are all formed from macromolecules. Four classes

Ideas for Crafts With Acetate

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Acetates are clear, transparent sheets used with overhead projectors. By preparing text and images on a computer program, then printing onto the sheets, the images are projected onto large screens. Acetates also lend themselves to many craft techniques. Print images you download from the internet on

Three Ways to Magnetize a Nail

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Simple magnetizing experiments can teach basic principles of magnetism in science classes and generate discussions about the earth's magnetic field. Using only basic materials such as a permanent magnet, electrical wires and a battery, a teacher can demonstrate three different ways to magnetize an i

How to Change Your Head on "Unholy Nations"

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The Unholy Nation is a specific world run on the Graal online gaming platform. The server is one of the oldest and most popular in the Graal worlds and represents a significant part of the Graal player base. It was founded in 2001 by users LiquidIce and AcidIce. Graal Online is a massive multiplayer

What is Hess's Law?

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Suppose you are responsible for purchasing the fuel for a chemical plant that produces carbon monoxide gas from graphite. Unless you are able to determine how much heat the process requires, you won't be able to keep enough fuel at the plant. Hess's Law can help you to calculate how much heat will b

How to Make Facials Out of Things at Home

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A facial is a skin-soothing treatment used to clean, massage and revive dull or dry skin. While this extra-special spa treatment can cost upward of $150 at a pricey salon, you can create a natural facial at home, using common products found in your refrigerator and pantry. By mixing up these pamperi

Different Gun Sights

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Sighting systems vary widely among firearms. At the extreme, some close-range personal defense pistols have no sighting system at all, while hunting rifles are often equipped with telescopic sights designed to deliver a precise shot at a target hundreds of yards away. Choosing the appropriate sight

How Do Gliders Work?

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Air MachinesA glider is a unique air vehicle that differs greatly from airplanes, helicopters and the like because of the crucial lack of one central component: the engine. However, this need not be a detriment; indeed, the lack of an engine in a glider can be seen by some adventurous...

Guide to Troubleshooting Photocell Sensors

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Outdoor lighting enhances a home's exterior and acts like a guide to direct visitors down a pathway. Many lighting systems utilize photocell sensors to automatically activate lighting, but the photocell can malfunction at times requiring simple troubleshooting procedures.

What Is the Difference Between Transistor & Doping?

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Transistors are made of pieces of semiconductor material pressed together with one wire connected to each piece of semiconductor. All of this is molded into a single plastic or metal covered package. Each piece of semiconductor is baked in an oven with a specific gas until a precise amount of the ga

How to Reload a Model Rocket Engine

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Model rocketry can be a fun, educational hobby, but it can also be expensive. Each time you launch a rocket, you're required to install a propellant-filled motor into the body, and the majority of those motors are single-use only. However, some new engines are reloadable and can be used on more than

Ceramic Plate Clay Centering

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Seashell Crafts of the Early 1900s

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Seashells have been used as craft materials for hundreds of years. During the late 1800s and the early 1900s, Victorian crafters used seashells to create and embellish home décor objects. Vases, frames and boxes were popular backgrounds for seashell crafts. Seashells were also used to create

How to Use Percentages in a Retail Environment

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The numerator of a proper fraction represents that the numerator is part of a whole represented by the denominator. In percentages, the whole is always 100 percent. Retail math involves percentages when calculating the cost for the seller of buying a product from the manufacturer. The seller then ca

How to Convert Tablespoons to Milliliters

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The traditional tablespoon is a unit of measurement that has uses in many aspects of a person's daily life, including healthcare and cooking. If you take a prescription or over-the-counter liquid medication for an ailment, you might find that instructions on the bottle state dosage in tablespoons. A

How to Finish a Walnut Log Mantel

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A walnut log mantel is a beautiful focal point for a fireplace. Walnut is a hard surface with a dark brown/purple color. The grain is open, with small pores. The finish on your log mantel should be clear to showcase the natural beauty of the wood.

How to Design a T-Shirt With Heat Transfers

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One of the more versatile garments people can have in their wardrobe is the T-shirt. Designed with various sleeve lengths and graphic prints, T-shirts can be easily worn all year long. One way to add more punch to a solid-color T-shirt is to apply heat transfer designs to it. With so many options av

How to Build a Guitar Side Bender

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Guitar side benders are simple jigs used to bend thin pieces of wood for acoustic guitar bodies. You can make one at home with a piece of plywood and some dowels. By making your own side bender, you can gauge the size and degree of bend for your hand made guitar body. Basically, a side bender is hal

How to Make a Model Boat With a Rubber-Band Propeller

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Making homemade toys like a paddle boat is an exciting way to introduce scientific principles to your kids---in this case, propulsion. You can add some fun with a sail or sailor and decorate your boat with paints or felt-tip pens.