why is plastic a good insulator of heat

why is plastic a good insulator of heat

When it's cold out, the best way to stay warm is to wrap up in layers of clothing. This works well because each layer traps air and reduces the amount of lost heat energy. The thicker the layers and the more layers you wear, the better the insulation. The same principle applies to all objects, from enormous buildings to your cup of takeout coffee. Styrofoam is the trademarked term used for polystyrene foam, a petroleum-based plastic. It is owned by The Dow Chemical Company. Styrofoam is exceptionally lightweight, an excellent shock absorber and an effective insulator, making it one of the most common plastics used in the manufacture of packing and insulating materials. ...

 why does my knee hurt when i bend down

why does my knee hurt when i bend down

I suffer from a pain in my knee when I bend down and stand back up again. It appears regularly, but not all the time. It feels like the muscle is being pulled and there is a slight burning sensation. It started about four months ago when my knee started to click in and out of place. This then stopped but came back, this time as a sore knee. It went away, but I then hit my knee on a post by accident and I was in pain for a while. The bruising has now gone down, but the pain has remained, especially when I bend down. Do you know what could be wrong? I don't know whether it's bad enough to go to a doctor or not. There are a number of explanations for this problem with your knee, but although a nuisance, none are likely to be serious. I will mention the two most common, although there may be

 why do some dogs eat their own feces

why do some dogs eat their own feces

By Dr. Becker If and when your BFF (best furry friend) does the unthinkable and samples some poop, it's best to try to keep an open mind (while also trying to keep your lunch down). This is because, according to "в [M]ore often than not, when animals engage in this behavior, they're not trying not to repulse us в but to communicate something vital about their health and biology. " The scientific name for "this behavior" is, and it will typically be your dog and not your cat who indulges. Beyond the disgust factor, many dog parents who catch little Buddy or Bella in the act leap to the conclusion there's something wrong with their pet. But as Brogan points out, that's not always or even typically the case. "In fact," he writes, "even when coprophagia does suggest that there's something

 why is the university of miami called the u

why is the university of miami called the u

CORAL GABLES, Fla. -- The University of Miami and adidas today unveiled the Hurricanes' new 'Legend of the U' Primeknit football uniforms, which will make their debut on Oct. 8 when the Hurricanes take on the Florida State at Hard Rock Stadium. , the 'Legend of the U' uniforms echo the past while looking to the future, and that overarching theme inspired the collaborative design between the University of Miami's athletic department and adidas Football. Merging innovation and style to produce the perfect blend of modern technology with a historic, national championship-yielding look, the retro style uniforms were designed as a nod the legacy and domination of the teams from the 80's and 90's which saw the Hurricanes win four national championships. Attention to detail was crucial to

 why do we have a national minimum wage

why do we have a national minimum wage

The National Minimum Wage (NMW) is the minimum pay per hour most workers under the age of 25 are entitled to by law. The government's National Living Wage (NLW) is the minimum pay per hour most workers aged 25 and over are entitled to by law. The rate will depend on a worker's age and if they are an apprentice. HMRC (HM Revenue Customs) can take employers to court for not paying the NMW/NLW. бе7. 50 per hour for ages 25 and over. бе7. 05 per hour for ages 21 to 24. бе5. 60 per hour for ages 18 to 20. бе4. 05 per hour for school leaving age to 17. an employee reaches a new age bracket. of each month will start to receive the new rate of minimum wage from 21 April onwards. These rates are reviewed annually by the Low Pay Commission. If a worker receives above NMW there is no legal

 why do people eat shark fin soup

why do people eat shark fin soup

To understand why Chinese eat shark fin soup, you must know three things about Chinese culture. First, Chinese are far more superstitious than most cultures today. They believe that a certain food will affect people in specific ways even when there is no scientific evidence for that belief. In this case, they believe that shark fin helps sexual potency. And that obsession with improving sexual potency is the second aspect of their culture. In China, they even have ' *** restaurants' in which they eat the penises of different animals in the futile hope that this will improve their performance in bed. The third cultural aspect that causes them to serve shark fin soup is the need to show off. The people of some cultures are quite modest about their financial status. Chinese are not one of

 why people want to be a nurse

why people want to be a nurse

>> Have you considered a? Itвs a very rewarding career, both monetarily and emotionally. Making a difference in peopleвs lives and bringing them hope and cheer is not something that you can achieve in just about any career. Read on to know why the nursing career is so rewarding. 1. There is great demand for nurses at present and this demand is projected to rise by 2020, by the Health Resources and Services Administration ( ). The job opportunities in this career field will be astounding for the right candidates. 2. ; an average registered nurse makes more than $52,000 a year and more experienced and specialized nurses make over $72,000. 3. A nurse can work in, each offering unique work environments. For example, a nurse can work in hospitals, schools, home care facilities,

 why was the supersonic transport named concorde

why was the supersonic transport named concorde

In the 1960's a race to create the first commercial aircraft to fly supersonically ensued between Boeing, BAC/Aerospatiale, and Tupolev. All were in agreement t hat supersonic air travel would be 'the next big thing', and therefore it was imperative to be 'first'. All were beset by spiralling development costs, and Boeing killed their effort before it got off the drawing-board. The Soviets spied and stole a lot of technical data from the Anglo-French plane (some of which was deliberately falsified and leaked! ), and with massive financial input from Governments, both had their aircraft ready in mid-1970's. Tupolev Tu-144 (a. k. a. Concordski) actually managed to enter service first, but was less comfortable, much noisier than Concorde - and had a habit of crashing. It rarely travelled

 why plastic containers are favoured for storing food

why plastic containers are favoured for storing food

Answer : Plastic is non-biodegradable product. Plastic takes several years to decompose, it is not environment friendly. It causes environmental pollution. Besides, the burning process in the synthetic material is quite slow and it does not get completely burnt easily. In the process it releases lots of poisonous fumes into the atmosphere causing air pollution. ...

 why do toes go numb when walking

why do toes go numb when walking

Foot numbness while exercising or walking isnвt usually a cause for alarm. More often than not, a simple change in footwear or technique can correct this problem. This isnвt to say you shouldnвt talk to a doctor, since proper diagnosis is essential to treatment. But evaluating everything surrounding the activity can go a long way to correcting many problems associated with numbness. Improper footwear could be the cause of your numbness. Ensure the shoes youвre wearing are made for your activity. Not wearing the right shoes for the activity could lead to undue stress anywhere along the foot, compressing a nerve and resulting in numbness. Also, determine the mileage of your shoes. Shoes worn for too many miles often lack the support needed to evenly distribute your weight across your feet.

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