why do we use coal to generate electricity

why do we use coal to generate electricity

Steam coal, also known as thermal coal, is used in power stations to generate electricity. PCoal is first milled to a fine powder, which increases the surface area and allows it to burn more quickly. In these pulverised coal combustion (PCC) systems, the powdered coal is blown into the combustion chamber of a boiler where it is burnt at high temperature (see diagram). The hot gases and heat energy produced converts water in tubes lining the boiler into steam. The high pressure steam is passed into a turbine containing thousands of propeller-like blades. ...

 why is the study of health important to the christian

why is the study of health important to the christian

1. Copy your kitty: Learn to do stretching exercises when you wake  up. Stretching in the morning boosts circulation along with  digestion.    2. Don't forget about breakfast. Studies show that enjoying a  proper breakfast is among the most most positive things you can do  if you're overweight. Breakfast skippers tend to gain weight. A  balanced breakfast includes fresh fruit or fruit juice, a good  high-fiber breakfast cereal, low-fat milk products or yoghurt,  whole wheat cheers, and a boiled egg.    3. Brush up regarding hygiene. Many people don't brush their teeth  thoroughly enough. Improper brushing can cause damage to the tooth  enamel and gums. People don't brush long enough, don't floss and  don't visit a dentist regularly. Be sure you're brushing your teeth  for

 why does a man cheat on a woman he loves

why does a man cheat on a woman he loves

"I am head over heels in love with my wife always have been. We have beautiful kids and we are a happy family. We have regular (great) sex, and the only issue is that while my wife had a couple previous partners before marriage, I had none. I thought I could live with it, but after nearly a decade of being together, I found myself this year wondering what I may have missed out on. "On a recent trip to Sin City, I was weak and strayed - had oral/vaginal sex with another woman (escort) outside of marriage. Used protection and had all of the required tests when I got back home no STDs. At the time, I justified this by convincing myself it would be good for my marriage, as it would stop me from obsessing about the fact that I've only ever slept with one woman. "I failed to estimate the

 why do we eat turkey at thanksgiving

why do we eat turkey at thanksgiving

The dishes vary from house to house. In some parts of the country, you'll find mashed potatoes and and in other places, sweet potato pie. But no matter how you Thanksgiving, in most homes around America, one guest is invited to the table each year в the turkey! The history of the turkey is a bit of a mystery. Nobody knows exactly how this particular bird earned a place of honor at the table each November, but historians have a few different theories. Thanks to letters and records kept by early American settlers, we know that when the colonists sat down to dine with the Wampanoag Indians, and were on the. This historical meal would later become known as the first Thanksgiving. Although historians cannot say for sure which types of were served up that day, a letter written by Edward

 why do we need fibre in our diets

why do we need fibre in our diets

Why do we need to eat fibre? It used to be called roughage, and people tried to get rid of it. P Now we have heard plenty about it, but why do we need in our diet? Dietary fibre is actually a form of that does not get digested by enzymes in our small intestine, and so its sugar units are not absorbed into the bloodstream. P Dietary fibre is therefore known as. However, fibre has important effects on other nutrients within the small intestine and through effects on the large intestine, where few other nutrients arrive intact. P It has a range of valuable health effects: Smooths out digestion and absorption of and fats in the small intestine. P It reduces the of a meal. Provides fuel for the healthful or good bacteria in our large intestine which in turn benefit us by making, and by

 why do we use si units in science

why do we use si units in science

SI is not based on the arbitrary construct of the human body; rather, on precise and definite standards. SI uses base 10, just like our number system, so it is much easier to learn, remember and convert between units. The prefixes used in SI are from Latin and Greek, and they refer to the numbers that the terms represent. (For example, "kilo" as in "kilogram" means 1 000 and "milli" means 1/1000). You can now easily calculate the number of millimeters in a kilometer. (how many inches in a mile? ) SI units are interrelated in such a way that one unit is derived from other units without conversion factors. E. g. Try that with the 'English' units. ...

 why do we need of ms paint

why do we need of ms paint

Выберите один из инструментов Кисть, Ластик, Линия или Распылитель и нажмите клавиши Ctrl и NumPad +. Чем дольше держать нажатой эту комбинацию, тем больше будет увеличиваться инструмент. Соответственно, если зажать Ctrl и NumPad, то инструмент будет уменьшаться. Все знают, что на левую и правую кнопки мыши можно назначить разные цвета, щелкнув соответствующей кнопкой на палитре. Однако, если при этом зажать клавишу Ctrl, можно дополнительно указать третий цвет. Для его использования зажмите и держите клавишу Ctrl. С приходом операционной системы Windows 7, после появления Цвет 1 (Color 1) и Цвет 2 (Color 2), эта функция была убрана. Инструмент Одноразового действияP после применения автоматически возвращает тот инструмент, который был активен до ее включения. Левой кнопкой берет основной

 why do the bones in my lower legs hurt

why do the bones in my lower legs hurt

Try support stockings to relieve the pain. And throughout the day, switch between standing and sitting. See your doctor about other types of treatment if your are very painful. Lower-extremity peripheral arterial disease. This can happen when the in your legs become damaged and hardened. When your arteries narrow or become blocked, your legs miss out on the blood flow they need. That can cause your lower leg to cramp and feel pain when you walk, climb stairs, or do other kinds of, because muscles aren't getting enough blood. Resting helps. But if your arteries become severely narrowed or blocked, the pain may persist, even when you rest. Also, wounds may not heal well. You're more likely to get this condition if you have, or you smoke or are. If you smoke, quit. ...

 why we use 4 20ma and not 0 20ma

why we use 4 20ma and not 0 20ma

we use4-20ma over0-10v because 1- the current transmission is didn't effected by length like the voltage, 2- the0 value can't make us difference between measure value or open circuit 3- why this start from4 to20 not from3 or2 to20 because in this area from0-4 the characteristic of thyristor is non linear and the voltage Papply is named cut-in voltage need Pto make thyristor on,beyond this area the relation is linear,and about20 ma not much because it's very easy to convert this value to voltage to act as input to plc when we use250 ohm resistance. A 4-10mA corresponds to a 1-5V analog voltage across a 250 Ohm resistor, making it easy to adapt the 4-20mA current loop to a 1-5VDC analog input voltage (common on many controllers using TTL inputs) to by simply placing a 250 Ohm resistor

 why does bladder have to be full for ultrasound

why does bladder have to be full for ultrasound

IБm supposed to have a full bladder for my ultrasound/procedure. But how full is too full? And what if IБm retroverted? October 23rd, 2014 by filed under,. First, letБs quickly review why we ask for a full bladder. When youБre lying on your back, your uterus either tilts up towards your belly button (anteverted), or back towards your spine (retroverted). Most women are anteverted. Between your uterus and your abdomen is the bladder. So, when you have a full bladder, it tends to tilt that upward-tilting uterus back the opposite way, forcing it to temporarily have a nicer, flatter surface. Why is that good? Because during an ultrasound, sound waves have to bounce off your uterus. A БflatterБ uterus means a clearer image, so the ultrasonographer can get a much better visualization of your