## why do scientists use the metric system

Not only scientists rely on the metric system. Almost every government in the world has adopted it as the national system of measurement, and of the three that aren't committed to it, at least one в the United States в considers it the preferred system for international trade. The U. S. National Council of Teachers of Mathematics has recommended that it be the primary measurement system taught in schools. Unlike the British Imperial System, the metric system, or SI (from the French SystГЕme International ), is based on a natural constant. SI is designed to make measurements and calculations easy to perform and understand, which is one of the main reasons scientists use it. The metric system originated in 17th century France. The base unit, the meter, was originally conceived by Gabriel

## why was johnny cash in folsom prison

"Hello, I'm. " Those words were uttered to wild applause in the cafeteria of Folsom Prison, a maximum security facility northeast of Sacramento, Calif. on Jan. 13, 1968. Johnny Cash played a lot of prison concerts during his career, though he never did hard time himself. His daughter Tara Cash Schwoebel says her father's interest in prisons went back to his days serving in the U. S. Air Force in Germany in the early 1950s. That's when he saw the noir crime drama Inside the Walls of Folsom Prison. "I think that's where all of this kind of grew from," Schwoebel says. "He was just moved by the film. " Cash wrote the song "Folsom Prison Blues" in 1955; it was his first big hit. But by 1968, he hadn't had a hit in several years. He'd become notorious for missing concert dates, and because of

## why do ph meters have an atc

A: Prolonged use, excessive alkaline immersion, or high-temperature operation will cause surface leaching of the membrane glass. The result is extremely noisy and/or sluggish response, which cannot be remedied simply by cleaning the electrode. If this occurs, the following procedures will often provide stability and pH sensitivity. Always consider the electrode's materials of construction before using these procedures. 1. Empty the reference chamber, rinse with deionised water, empty and refill with the specified filling solution. 2. Soak the electrode in hot (50 C 60 C) reference electrolyte for a few minutes. 3. Soak the electrode overnight in pH 4 buffer. 4. Remove any exterior salt deposits with distilled water. 5. If the filling solution does not flow through the junction by this

## why do we celebrate world aids day

World AIDS Day was first conceived in August 1987 by James W. Bunn and Thomas Netter, two public information officers for the Global Programme on AIDS at the in Geneva, Switzerland. Bunn and Netter took their idea to Dr. Jonathan Mann, Director of the Global Programme on AIDS (now known as ). Dr. Mann liked the concept, approved it, and agreed with the recommendation that the first observance of World AIDS Day should be on 1 December 1988. Bunn, a former television broadcast journalist from San Francisco, had recommended the date of 1 December that believing it would maximize coverage of World AIDS Day by western news media, sufficiently long following the US elections but before the Christmas holidays. In its first two years, the theme of World AIDS Day focused on children and young

## why do we only use 10 of our brains

Одной из версий происхождения мифа могут являться результаты работы и Бориса Сидиса. В 1890-х годах они тестировали свою теорию ускоренного развития ребенка на примере, которого называли обладателем самого высокого в истории. Сам Уильям Сидис сообщал, что люди не используют свой мозг полностью. В в предисловии к книге американский писатель Лоуэлл Томас написал Профессор Уильям Джеймс говорит, что люди используют лишь 10 процентов своих умственных способностей. Согласно другой теории, миф появился из-за недопонимания (или неправильной интерпретации) нейробиологических исследований конца P начала. К примеру, функции многих отделов мозга (особенно в ) настолько сложны, что следствия повреждений имеют неочевидный характер, что затрудняло понимание назначения отделов первыми нейробиологами.

## why do ship float and needle sink

Achu, There are a few things that determine whether or not a boat will float, such as its shape, its load, and where the boat is sailing. First, let's talk about density. Density is a measure of how much mass of something is packed into a certain volume. For example, iron is denser than wood because a volume of iron (say a cube one centimeter on each side) weighs more than the same cube if it were made of wood; there's more "stuff" inside the cube of iron than in the cube of wood because its atoms are mostly heavier but take up about the same amount of space. If something is denser than water, in general, it will sink. If it is less dense than water, it will float. Cooking oils are less dense than water, which is why they sit on the top of pots of water. Ships are often made of wood,

## why do planets orbit the sun for kids

In, the orbits around. Earth в and the other planets в around. also orbit around the Sun. Have you ever wondered why the Earth, the other planets, and the stars just donвt go flying off on their own into space? What keeps them on their track? The answer is gravitational forces. The Sun, as well as the planets, has a that attracts smaller objects and holds them in place. But, you ask, why donвt the planets fall into the Sun? When you point a magnet at a paper clip, the paper clip becomes attached to the magnet. Why donвt the planets do the same thing? The planets and stars travel on an elliptical path around the Sun, which keeps them from falling into the Sun. ...

## why do under the skin pimples hurt

There isnвt one single cure or treatment for acne. Your condition will be treated depending on the type you have and its severity. Papules and pustules are often considered to be a mild form of acne. You may be able to treat them with over-the-counter (OTC) products containing or. If you follow the instructions on the individual product, your skin may clear up within a few weeks. If you arenвt seeing any success with OTC treatments, you may want to speak with your doctor about other options. Cysts and nodules should be treated by a doctor. These are more severe forms of acne that require intensive treatments. Your doctor may recommend topical treatments, oral treatments, or even a different treatment method, such as light therapy. There are a variety of topical treatments for acne. Some

## why is allah not answering my prayers

Question: I would like to ask relating to the dua of prophet Yunus (as). I read in Maariful Quran something like this: [(And this is how We rescue the believers 21:87. ) That is, just as We released Yunus from his misery and distress, so do We deliver other believers when they turn towards Us repenting their sins sincerely. According to a hadith of the Holy Prophet (Allah bless him and give him peace), if a Muslim prays to Allah Ta ala for the grant of a wish in the words used by Yunus (a) when he was in the stomach of the fish i. e. la ila ha illa anta subhanaka inni kuntu minadhdhalimeen (21:87) He would accept his prayer and grant his wish. (Ahmad, Tirmidhi, Mazhari)] I ve been trying this dua in my life for many years but didn t always get what I prayed to Allah and wished for. If I

## why should cannabis be legalised in the uk

MLG NEEDS MORE DANK QUICKSCOPERS LIKE ME AND FAZE TEDDY BEAR AND BRODY DUFFY THE MLG DANK TRICKSHOTER FOR FAZE ADD ME ON XBOX xXBLAZEITBERTIEXx OR I WILL CRIE EVERYTIM LEGALIZE THE 420 BLAZE ON LADS. MLG NEEDS MORE DANK QUICKSCOPERS LIKE ME AND FAZE TEDDY BEAR AND BRODY DUFFY THE MLG DANK TRICKSHOTER FOR FAZE ADD ME ON XBOX xXBLAZEITBERTIEXx OR I WILL CRIE EVERYTIM LEGALIZE THE 420 BLAZE ON LADS. Substances such as tobacco and alcohol are legal and cannabis isn't. Tobacco causes about 6 million deaths annually whereas there has never been a cannabis caused death ever. Furthermore there is no actual reason for keeping the substance illegal. The US government publicised negative effects of the drug and these claims have been proved wrong. Cannabis should be legalized in the United Kingdom.

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