What is viscous Behaviour?
The viscosity of a substance is simply the proportionality constant required to equate strain rate with stress. Ideal viscous behavior is referred to as Newtonian behavior, and occurs when there is a linear relationship between stress and strain rate.
What causes viscoelasticity?
Viscoelasticity is caused by temporary connections between fiber-like particles. Polymers always show a viscoelastic behavior because they consist of long molecules able to make temporary connections with their neighbors.
What is viscoelastic material used for?
Viscoelastic materials are used in automobile bumpers, on computer drives to protect from mechanical shock, in helmets (the foam padding inside), in wrestling mats, etc. Viscoelastic materials are also used in shoe insoles to reduce impact transmitted to a person’s skeleton.
Which method is used for measuring the viscoelastic behavior of materials?
Which method is used for measuring the viscoelastic behavior of materials? Explanation: Broadband viscoelastic spectroscopy and resonant ultrasound spectroscopy are the two most widely preferred techniques for viscoelastic testing.
How is viscoelasticity measured?
In industries such as biomaterials, viscoelasticity is often measured by applying a sinusoidal force, calculating the resulting strain response and determining the elastic-spring-like storage modulus and the flow-like loss modulus. Such dynamic mechanical analysis can be performed as a bench test or deployed in-situ.
What are three types of strain?
In response to stress, rock may undergo three different types of strain – elastic strain, ductile strain, or fracture. Elastic strain is reversible.
What are the types of strain injury?
Common Strain Injuries
- Hamstring Strain.
- Quadriceps Muscle Contusion.
- Calf Strain.
- Groin Strain.
- Rotator Cuff Tears.
- Rupture Long Head Biceps.
- Achilles Rupture.
What is the best definition of a strain?
Strain is defined as to exert or stretch to the maximum or to injure by too much exertion. The definition of a strain is a bodily injury due to overexertion or an excessive demand on resources. An example of strain is a pulled muscle.
What is the cause of strain?
What causes a strain? A strain is caused by twisting or pulling a muscle or tendon. Strains can be acute or chronic. An acute strain is caused by trauma or an injury such as a blow to the body; it can also be caused by improperly lifting heavy objects or over-stressing the muscles.
What is another word for strain?
Strain Synonyms – WordHippo Thesaurus….What is another word for strain?
| tension | force |
|---|---|
| distension | shear |
| tenseness | tensity |
| pressure | pull |
| stress | stretch |
What does sampan mean?
A sampan is a relatively flat-bottomed Chinese and Malay wooden boat. Some sampans include a small shelter on board and may be used as a permanent habitation on inland waters. The word “sampan” comes from the original Cantonese term for the boats, sāam báan (三板), literally meaning “three planks”.
What is the difference between a sampan and a junk?
A junk may have five masts, whereas a sampan — if it has any — generally has only one. A junk is typically five times as long as a traditional sampan, and junks are considered ships, while the smaller sampans are classified as boats.
What is a junk?
Junk is defined as garbage, trash or worthless items, talk or ideas, or to bonds that are unlikely to be paid back to the investor, or is slang for a narcotic drug. Crumpled up papers and old toys are an example of junk. The drug heroin is an example of junk.
What are junks and sampans?
The Chinese, Worcester explains, “regard their junks as strictly neuter and, in the case of riverine craft, make no attempt to name them”—unlike the coast of Maine where even a dinghy carries a moniker. Sampans are flat-bottomed, with a small attached shelter, and are usually propelled by poles or oars.
Why is a boat called a junk?
The origin of the word “junk” in the English language can be traced to the Portuguese word junco, which is rendered from the Arabic word j-n-k (جنك). The word was used to denote both the Javanese/Malay ship (jong or djong) and the Chinese ship (chuán), even though the two were markedly different vessels.
What are dhows and junks?
A dhow is a traditional sailing vessel used by Arab countries. It typically had one or more lateen sails. A junk is a traditional Chinese sailing vessel. It was utilized to sail the oceans and for distance.
Why is it called junk?
Originally a nautical term for a piece of old cable (perhaps like the rope that went into BP’s junk shot), it was transferred to unwanted rubbish or poor-quality stuff more generally in the mid-19th century.
What does junk mean sexually?
The word “junk” is American English slang for a man’s genitals.
Why is a Chinese junk called a junk?
It would be easy to assume, as many do, that the English word “junk” comes from Chinese – chuán in Putonghua or Southern Min chûn. Their word for “ship”, djong (Old Javanese jong), traces back to an Old Javanese 9th-century inscription; the word had entered Malay as jong by the 15th century.
What is junk food short definition?
Junk food is unhealthy food that is high in calories from sugar or fat, with little dietary fiber, protein, vitamins, minerals, or other important forms of nutritional value. The term HFSS foods (high in fat, salt and sugar) is used synonymously.
What is junk food give two examples?
Foods commonly considered junk foods include salted snack foods, gum, candy, sweet desserts, fried fast food, and sugary carbonated beverages. Many foods such as hamburgers, pizza, and tacos can be considered either healthy or junk food depending on their ingredients and preparation methods.
Is bread a junk food?
Most commercial breads are unhealthy if eaten in large amounts, as they’re made from refined wheat, which is low in fiber and essential nutrients and may lead to rapid spikes in blood sugar (10).
Why we should avoid junk food?
Why is junk food bad? Eating junk food on a regular basis can lead to an increased risk of obesity and chronic diseases like cardiovascular disease, type 2 diabetes, non-alcoholic fatty liver disease and some cancers. We know Australian’s eat too much junk food.
Why do we love junk food?
It’s typically high in things like salt, sugar and fat. They trigger pleasure centers in our brains, making us feel oh-so-yummy-good and making us want to keep eating. See, our brains are relatively big. They require a lot of energy to do their thing.
What are the harmful effects of junk food?
5 Harmful Effects Of Junk Foods
- Junk foods can hamper your development and may eventually make your brain weak and non-functional.
- What are Junk Foods?
- Increased Obesity.
- Loss of Memory and Learning Problems.
- Lead to Depression.
- Worsens Appetite and Digestion.
- Inadequate Growth & Development.
What are the benefits of junk food?
- 1 of 8. Chocolate: Increases brainpower.
- 2 of 8. Ice-cream: Source of calcium.
- 3 of 8. Snickers bars and peanut M&M’s: Source of protein.
- 4 of 8. Hot chips: Source of fibre and vitamins.
- 5 of 8. Fish and chips: Better heart health.
- 6 of 8. Alcohol: Reduced risk of stroke.
- 7 of 8. Pizza: Source of essential vitamins.
- 8 of 8.
Which is the healthiest junk food?
Tortilla chips (or something like them) Beanitos bean chips taste like tortilla chips minus the junk food ingredients and are perfect for dipping into delicious guacamole. Siete Foods Grain Free Tortilla Chips is another great option that even has a nacho flavor. You may possibly never eat another greasy chip again.”
What is the advantages and disadvantages of junk food?
There are high levels of trans fat found in fast food as well. There is no amount that is considered to be healthy or good for your body. It increases your bad cholesterol levels, lowers your good ones, and increases your risk of heart disease and diabetes.
What is difference between healthy and junk food?
Generally, healthy food helps in providing more energy to your body so that you can work all day long without feeling exhausted. Some high energy foods are fresh fruits, green leafy vegetables, sprouts, raw nuts, honey, yogurt, etc. On the other hand, unhealthy foods are low in energy and high in fat content.