Uses and examples of Static Electricity

Uses and examples of Static Electricity

1.     Photo Copiers:

All you need to do when working a photocopier is adjust the paper in the allocated scanning area and configure some options and your document or paper is photocopied. So what really happens under that cover? A photo copier actually uses static electricity to move text and pictures from the original document into other paper copies. We know that opposites attract and that if you rub an object such as a rubber balloon with human hair ,negatively charged electrons will start jumping from your hair to the balloon leaving your hair positively charged. If you then bring the balloon close to your hair you will observe static electricity and will find that your positively charged hair is being attracted to the negatively charged balloon. This concept is used in the photocopier where the balloon is a special drum made of photoconductive material that is negatively charged with a corona wire. The copier also contains a very fine black powder known as a toner or black ink and can be attracted by the drum full of a negative form of static electricity. The drum is only selectively charged by the corona wire on the areas of the image where there is black and not charge the drum on the areas that are white. In that way the black ink is only attracted in those areas and an image is created. This concept is also used for colored ink.

Citation:

1.Meeker-O'Connell, Ann.  "How Photocopiers Work."  01 February 2001.  HowStuffWorks.com. 28 May 2010.

2. "Uses of Static Electricity." HubPages. Web. 28 May 2010. .

2.     Car Painting

Weirdly enough, car painting is another real-life example on how static electricity is used. Have you ever wondered how paint will stick to a car? Well, the paint used to paint the car is first charged with a negative static charge using the spray while the metal body of the car is submerged in a substance that will create a positive static charge on it. In that way the paint will be attracted to the car part using through the concept of opposite charges attract. This will ensure two things. First, that now there is a uniform layer of paint so that when there is enough negative paint on the car, the new paint will repel the old paint that was already on the car. Second, this uniform layer is able to resist high speeds and weather conditions to ensure that the car’s metal interior is protected and that the paint won’t come off.

Citation:

1. "WikiAnswers - How Do You Paint Using Static Electricity." WikiAnswers - The Q&A Wiki. Web. 28 May 2010. .

2. "Uses of Static Electricity." HubPages. Web. 28 May 2010. .

3.     Dust Removal

To myself, this is probably the last thing I thought static electricity could be able to do. To my own surprise, static electricity is used to help appliances such as air purifiers and enable dust removal. This occurs by the appliance altering static charges to the dust particles allowing a force to pull the dust particles to a plate or filter in the air purifier that is oppositely charged also using the concept of opposites attract. The same concept is used in industrial smoke stacks where their aim is reduce the percentage of pollution that they are producing as a waste product. Static electricity is used the same way as in the air purifier to enable pollution control. It works by also altering static charges to the dirt and dust particles which then cling on to oppositely charged collecting plates on the upper area inside the smoke stack because of the concept of opposites attract. In this way a reduction to the amount of pollution that is created and that will enter the atmosphere.

Citation:

1."Uses for Static Electricity - Succeed in Understanding Physics: School for Champions." School for Champions: Online Lessons for Those Seeking Success. Web. 28 May 2010. .

2."Uses of Static Electricity." HubPages. Web. 28 May 2010. .

Respiratory System Worksheet

Respiratory System Worksheet


Q2. List the structures in the order in which air passes them as it travels from the nose to the lungs.

1. Pharynx
2. Trachea
3. Bronchi
4. Bronchioles
5. Alveoli

Q3. Which is the odd one out?

Nasal Cavity


Q4. How are dust particles that enter the respiratory system in the air expelled?

Via the nasal cavities where the immune system starts to work o keep out bacteria. Dust particles also sometimes cling on to hairs called cilia.


Q5. Add the correct terms from the list below to the following descriptions


a) Smallest respiratory passageways (Bronchioles)
b)Separates mouth from the nose (Palate)
c)Windpipe (Trachea)
d)where gas exchange takes places (Alveoli)
e)Stops food "going the wrong way" i.e. choking during swallowing (Epiglottis)
f) Both air and food pass through this (Pharynx)
g) The movement of air out of the lungs (Expiration)
h) The main muscle involved in inspiration (Diaphragm)
i) Membranes that cover the lungs and line the pleural cavity (Pleura)
j) The volume of air inhaled or exhaled at each normal breath (Tidal Volume)





Q6. Arrange these statements in the right order to describe inspiration.



The muscles between the ribs contract to move ribs cranially and laterally. The diaphragm contracts and flattens. The lungs expand to fill the space created. The air pressure in the air tight pleural cavities decreases. Air is drawn down the trachea into the lungs.




Q7. True or false? Circle the correct answer

a) The pericardium is the membrane surrounding the lungs.(True)
b) The tidal volume describes the maximum amount of air that can be inhaled into the lungs (False, it is inhaled and expired)
c) The epiglottis closes off the larynx during swallowing (False)
d)When an animal exercises the rate of breathing increases because the carbon dioxide in the blood increases.(True)
e)Carbon Dioxide in the blood is mainly carried in the blood plasma (True)
f)Oxygen moves from the alveoli into the capillaries by the process of osmosis(False, The gas diffuses)
g)Expired air contains about 16% of oxygen.(True)



Q8. Add the following labels to the diagram of a section cut across lung alveoli shown below.











 

Asthma and Smoking Brainpop Videos

Asthma and Smoking Brainpop Videos

• Asthma:

Asthma is a condition that occurs to the lungs and is very common. People with asthma experience frequent coughing, shortness of breath and tightness in the lungs followed by several asthma attacks. When our lungs inhale oxygen or in other words when we breath millions of small air sacks called alveoli oxygen starts to enter the blood while carbon dioxide is expelled out of our bodies. An asthma attack is usually triggered when dust particles, pollution, mold, etc enter the body of someone with the asthma condition. They enter the lung air ways which causes a chemical called mucus to be released causing swelling and makes the airways narrow making it almost impossible to breath. Other factors such as food allergies, exercise, weather and sometimes strong emotions. With proper doctor's care, a person with asthma conditions can do sports and other activities with the help of his/her asthma inhaler which launches medicine that will reduce the swelling and expand the lung airways making breathing easier again.

• Smoking:

Smoking is one of man's worst bad habits. It is basically a drug that is made out of tobacco as well as many other chemicals such as tar and the very addictive, nicotine. Our lungs have a job to do, they are made to inhale oxygen and distribute it among the rest of the body then exhale the waste product which is carbon dioxide. Inhaling, smoke instead of oxygen causes the lungs to literally start getting coated with tar causing damage to it cells and also causing it start changing in color to black. This affects the human being over time and causes diseases such as emphysema, lung cancer and heart disease. Other than diseases, smoking also has some other side effects, including developing shortness of breath and constant coughing which are caused by the lungs having too much tar that makes it harder to inhale oxygen and transfer it to the rest of the body. Finally, smoking can be really hard to quit, as you can see, many smokers will have trouble leaving this very bad habit because of the excess nicotine that supposedly gives the smoker 'pleasure' while smoking.

Healthy and Unhealthy Foods

Healthy and Unhealthy Foods

Unhealthy foods contain different things that can harm the human body and can cause different diseases overtime. Excess calories is one of the greatest contributers in becoming fat and increase Unhealthy foods especially fast food such as McDonald's contain a lot of excess calories leading to becoming fat or other overweight diseases such as Diabetes and high blood pressure e.g. 1 Big Mac meal= 2000 calories which is more than 60% of the calories needed per day. Saturated fats is another factor that causes diseases and is in most fast food. More saturated fats will cause plaque to start to build up in your arteries and could cause blood to stop going through to certain parts in the body. Unhealthy food usually contains high amounts of salt which assumably tastes good for most human beings. High sugar is basically the same and is in sodas, chocolates and other unhealthy foods. High salt could cause high blood pressure while high sugar could cause more amounts of insulin made by the pancreas causing the blood sugar to go high then low. Empty calories are another element in unhealthy foods and contain little minerals and little vitamins but are found a lot in unhealthy food. Therefore, they cause the human being to keep eating but not benefit from the food and ends up with less vitamins and/or minerals but also keeps the human being eating since he/she are not full yet. This is oppisite to healthy food which makes you full really quickly without the need to eat too much. Healthy also contains low calorie and saturated fats as well as high fiber which can't be digested. All these build up the human body in the correct way with less fats and more protien and minerals keeping the healthy brain in the helathy body.

Parts of the Digestive System

Parts of the Digestive System

In this unit, we covered the digestive systems and wrote some notes on all the parts of the digestive system on our laptops. Since my laptop was in IT Support, I figured that if I write my notes on paper, I could later on take clear photographs of the notes and successfully have a paper and digital copy of my notes. Here are the photos that show the notes that cover the digestive system:

What is my MYP grade?

What is my MYP grade?

Abdelrahman has been really keeping a consistent effort throughout the year and has been showing outstanding results in each of his criteria. His high scores led to an overall academic grade of 7. Although Abdelrahman showed a great academic performance, he slightly lacks the ability to focus on his studies at all times and sometimes shows less effort in class. Abdelrahman can improve by trying harder to get homework assignments done on time as well as focusing in class and getting all his agendas down. This will help Abdelrahman continue his success and his academic performance as well as showing 100% effort at all times by completing the assigned homework on his blog and writing the agenda down preferably on his digital notebook that was supposed to be downloaded.

The Mouth

The Mouth

In this part of the digestive system, food is physically broken down into small bits. Saliva

slimes the food so that it can easily slide down the Esophagus and carbohydrates are started to

be broken down chemically.