You are reading our best questions and answers in the how is category
A toothbrush is a instrument that is used to clean the teeth, gums and tounge. The toothbrush is used to brush the plague and other contaminates from the surface of the teeth and gums. It is generally used in conjunction with toothpaste and dentists recommend that your teeth should be brushed at least twice a day. Whilst toothbrushes come in a variety of sizes, colours and bristle types they generally consist of a cluster of bristles attached to a handle. Toothbrushes have been around for a very long time with the earliest bristle toothbrush dated to 1600 BC. Since then toothbrushes have evolved from their original form which used hog derived bristles to the synthetic ones that we use today. So how is a toothbrush made? Read this article to find out.
Carpet is a type of floor covering that is used in many homes and office spaces. It is used to insulate against noise and heat lost and can be placed on walls and ceilings as well as floors. It comes in a variety of thicknesses, colors and patterns and is an important part of decor. Carpet is made from a number of different materials such as wool, polypropylene, nylon or polyester. It is thought that carpet has been around since at least the 3rd or 2nd millennium BC. So how is carpet made? Read on to find out.
Gelato is a form of ice cream that contains little to no air. It is made from milk, cream, sugar/s and flavorings that are usually derived from fruit and nuts. Gelato also usually contains egg and the simple base recipe can be flavored in a variety of ways. The word gelato is Italian in origin and comes from the Latin word “gel?tus” which means frozen. Dairy gelato is generally higher in sugar than ice cream, but lower in fat. Traditional gelato uses fruit and nut purees to flavor the product so they don’t usually contain as many artificial colors and flavors. How is this delicious, frozen treat made? Read this article to find out.
Liquid nitrogen is simply the element nitrogen in liquid state. Nitrogen is a gas at room temperature, it is the largest component of air, but it turns into a liquid at an extremely low temperature. Nitrogen has a boiling point of approximately -196 °C (-321 °F) and it freezes at -210 °C (-346 °F), which means that liquid nitrogen can only exist between these temperatures. Liquid nitrogen is used for a number of applications such as storing cells, blood and other biological materials at extremely low temperatures, removing unwanted skin lesions, as a coolant, and many more. Let’s find out how liquid nitrogen is produced.
Nickel is a naturally occurring chemical element with the chemical symbol of Ni. It has an atomic number of 28. It is a hard silvery-white substance, known as a transition mineral. It is highly reactive with oxygen, which means that it isn’t found in its free form on the Earth’s surface. Native nickel is most often found with iron and it is thought that the core of the earth is made from a nickel-iron mixture. Nickel is used mostly in its alloy form.
Like most alcoholic beverages, vodka is produced by fermenting a starch or a sugar. Most vodka is fermented from grains such as corn, rye, wheat or sorghum. Other substances used to make vodka include potatoes, molasses, soybeans, grapes, rice and sugar beets. Vodka can also be produced by fermenting crystal sugar and yeast. Vodka produced from wheat and rye is regarded as a superior quality spirit.
Rotavirus is a virus that causes vomiting, fever and severe diarrhea, symptoms commonly known as stomach flu. The virus is transmitted from the feces to the mouth and it usually takes two days before the symptoms develop. These symptoms occur because the virus damages the cells lining the small intestine. It is the most common cause of diarrhea in children and almost 500,000 children under 5 die from the condition each year. There are 5 species of the virus and it is estimated that almost every child in the world has been infected with one of these strains by the time they are 5 years old. After infection the body develops immunity and any further infections are not usually severe. Let’s find out how this potentially life threatening virus is treated.
Mayonnaise is a creamy, white sauce that is often used as a condiment. It has a slightly tangy taste and is added to both savory and sweet dishes. Mayonnaise can come in a variety of different flavors as it basic recipe lends itself well to the addition of herbs and spices. It is generally made from oil, egg yolk and either vinegar or lemon juice. It is thought to have originated in Spain, but the flavor and consistency of mayonnaise varies depending on the area of the world it is made. Mayonnaise was popularized by the French, with the word originating from an old French word moyeu meaning the yolk of an egg.
Bubble gum is a type of chewing gum that is made to be inflated into a bubble. To allow for this it is made to be less sticky and more stretchy than regular chewing gum. Bubble gum was invented by Walter E. Diemer, who was an accountant at the Fleer Chewing Gum Company. He was experimenting with new recipes and came across the perfect bubble gum by accident, which was later named Dubble Bubble by the president of the company. It was made pink because that was the only food coloring available for Diemer, and today many companies still make their bubble gum in pink! Let’s find out how bubble gum is made today.
Rice is an edible grain grown from the Asian rice or African rice plants and there are about 40,000 different varieties available. Rice is the most important staple food throughout much of the world, but it is especially important in Asia where it was first domesticated. It is second only to maize (corn) in terms of worldwide production, and the largest producers of rice include China, India, Indonesia, Bangladesh. The largest non-Asian producer of rice is Brazil. Have you ever wondered how this important food is grown and harvested? Keep reading to find out.