OFF Limits

2010 in review

ischoolskathleen — Mon, 03 Jan 2011 06:54:10 +0000

The stats helper monkeys at WordPress.com mulled over how this blog did in 2010, and here’s a high level summary of its overall blog health:

The Blog-Health-o-Meter™ reads This blog is doing awesome!.

Crunchy numbers

The Leaning Tower of Pisa has 296 steps to reach the top. This blog was viewed about 1,100 times in 2010. If those were steps, it would have climbed the Leaning Tower of Pisa 4 times

In 2010, there were 3 new posts, growing the total archive of this blog to 6 posts. There were 2 pictures uploaded, taking up a total of 31kb.

The busiest day of the year was July 29th with 36 views. The most popular post that day was Electromagnetism: In Everyday Life!.

Where did they come from?

The top referring sites in 2010 were en.wordpress.com, statistics.bestproceed.com, ischoolsgenalynbiadnes.wordpress.com, google.com, and fienchannel.com.

Some visitors came searching, mostly for electromagnet, electromagnetism, why did i choose this topic, i chose this topic because, and i choose this topic because.

Attractions in 2010

These are the posts and pages that got the most views in 2010.

Electromagnetism: In Everyday Life! January 2010
1 comment

Electromagnetism! November 2009
1 comment

Why did I choose this topic? November 2009

Electromagnetism: In Action.. December 2009
2 comments

Electromagnetism: Behind the Units.. February 2010
1 comment

Electromagnetism: In Medicine..

ischoolskathleen — Wed, 31 Mar 2010 02:10:19 +0000

Electromagnetic Therapy

Electromagnetic therapy is based on the belief that an imbalance of the electromagnetic frequencies or fields of energy can cause illness. By applying electrical energy to the body, the imbalance can be corrected. Many electrical devices are available on the market to treat a variety of symptoms. However, most are not approved by the US Food and Drug Administration (FDA).

Electromagnetic therapy is also called bioelectricity, magnetobiology, magnetic field therapy, and magnetic healing.

Standard/conventional medicine makes some use of electromagnetic energy. Examples include:

“jump starting” the heart after a heart attack
using electrical currents to increase bone growth
transcutaneous electrical nerve stimulators (TENS) – used to treat some types of pain.

Click here to view the
Online Resources page of this Web Site.

Electromagnetism: Behind the Units..

ischoolskathleen — Sun, 07 Feb 2010 06:16:58 +0000

The direction of the magnetic field at a given point can be defined as the direction that the north pole of a compass needle would point if placed at that point. The figure below shows how thin iron fillings (acting like tiny magnets) reveal the magnetic field lines by lining up like the compass needles.

source: google.com

In the figure below the magnetic field determined in this way for the

field surrounding a bar magnet.

source: google.com

Notice toward the south pole of a magnet (the north pole of a magnetic compass needle is attracted to the south pole of the magnet).

Magnetic field lines continue inside a magnet. Indeed, given the lack of single magnetic poles, magnetic field lines always form closed loops, unlike electric field lines that begin on positive charges and end on negative charges.

After learning lets try to have fun now.

Try to explore and answer given the link below.

Fun Trivia: Quizzes and Scientists..

Electromagnetism: In Everyday Life!

ischoolskathleen — Sun, 03 Jan 2010 12:11:57 +0000

Electromagnetism exists everywhere. When people drive, walk, or even go to the beach. However, due to the extreme complexity of the topic, electromagnetism has proven to be a subject studied by those who are crafty and willing enough to explore the domain. The ideas of electricity start from simple objects such as springs, coils and magnets that simply created a current for some sort of affect to either start or light some object. Now these theories have expanded to a point where our everyday lives are affected by it. When people start their cars for example, a magnet turned by a flywheel generates current through coils to help ignite the cars electrical system. In short, electromagnetism exists everywhere in our everyday lives.

There are many examples of electromagnetism effecting technical objects of today’s society. One particular example would be radar devices used for tracking ships, cars, or even submarines. The ideas of sending out a signal composed of a wave of certain frequency and wavelength returned at a certain time can be used to find objects or map out underwater territory. Use of similar techniques allows for policemen to radar speeds of drive-by cars. Although, crafty engineers have created stealth devices that are able to mask their speed by accepting the radar beam and by scrambling it via frequency changes or simply send the same signal back at a delayed time thus justifying a slower speed. This is just a mere fraction of the uses of electromagnetism. Another possible use for electromagnetism would be on the vile side of destruction. There are many aspects of electromagnetism. One of the fiercest uses is as a weapon.

EM guns, tanks, and devices are harmful and more dangerous than normal guns and missiles due to their non-ballistic style of weaponry. Unfortunately, this horrendous idea is true. EM guns have been able to destroy cars, technical devices, and live mammals just by the use of electromagnetism. Different wavelengths of EM waves proved to create different effects for both cars and humans. The new wave of weaponry exists in EM guns. The concept of electromagnetism is a wonderful subject and beautiful art within itself. Unfortunately, like other things, when used the wrong way even beautiful things have the capability to be turned ugly.

Electromagnetism: In Action..

ischoolskathleen — Wed, 02 Dec 2009 09:09:20 +0000

Do you know that without electromagnetism, video cassettes will still be the figment of the imagination of Chester Gould, the creator and artist of the famous detective comic strip Dick Tracy? Now that the video cassette recorder is a common household appliance, have you ever wondered how it works?

Home video recorders pick up electrical signals from TV stations but instead of converting the video signals directly to pictures, they are stored on magnetic tape in the same manner that a tape recorder store sound. Because TV signals combine pictures and sound, home video tapes are about four times the width of audio cassette tapes.

There are two video cassette recording system available, both are product of Japanese imagination and ingenuity. The Betamax was introduced by Sony in 1975 and the VHS (Video Home System of JVC (Japan Victor Company) followed in 1976. The system are not compatible. If you have a Betamax system, you cannot use the VHS tape and vice versa. Since Betamax was introduced in the Philippines, there are more Betamax sets use in here. The VHS is the most popular in the United States because that system preceded Sony’s system.

Based on what I had experienced, when the video cassette is inserted into the video recorder and the record button is pressed, the motor draws a loop of tape from between two reels in the cassette and coils it around an electrically drive n rotating drum.

Actually, that two video recording heads, which are actually electromagnets, are mounted on the drum and imprint the signals on the tape as they rotate with the drum. The video tape has a series of sloping tracks in the middle for the video signals and a lengthwise track along the edge of the tape for the audio signals.

Electromagnetism!

ischoolskathleen — Thu, 19 Nov 2009 02:13:59 +0000

Many have wondered why electromagnetism exists here on Earth. Most of the people don't know what really is the main meaning and purpose of electromagnetism
that it had been discovered here on Earth. Actually, electromagnetism plays an important role here in our life.
Devices at home is one of the examples or products of electromagnetism.
Electromagnetism is really did fascinating.
It is easy to forget that the ``old-fashioned'' physics we learn today was once new
 and exciting and that it was discovered by people of incredible imagination.

 
As we know electromagnetism is under the field of physics which means the study of the
properties of electric and magnetic field and  also the force affected by the presence and motion
of such particles.

image source:google.com


I want to tell you based on what I have read the story of the person
who made important contributions to electromagnetism.


image source:google.com

Hans Christian Oersted
This document is a copy of one found in the contribution of Oersted.

"On 21 April 1820, while preparing for an evening lecture,
Oersted noticed a compass needle deflected from magnetic
north when electric current from a battery was switched on
and off. This deflection convinced him that magnetic field radiate
 from all sides of a wire carrying an electric current, as do light
and heat, confirming a direct relationship between electricity and
magnetism. Three months later he began more intensive investigations
and soon there after published his findings,showing that an electric
current produces a magnetic field as it flows through a wire."

A SAMPLE VIDEO FOR THE INTRODUCTION OF ELECTROMAGNETISM!

To understand the subtopics of electromagnetism like ELECTROMAGNET’S CONTENT. You may explore.

HOW TO USE ELECTROMAGNETISM?

Electricity and magnetism are closely related, and the physics of these two similar properties is known as electromagnetism. An electromagnet is a device using an electrical current to generate a magnetic field. You can make a simple electromagnet by wrapping insulated wire around an iron nail and connecting the wire to a battery. One of the most well-known practical applications for electromagnets is to move heavy metal objects such as crushed cars. However, there are also many other common uses for electromagnets. Its will be explained below.

ELECTROMAGNETISM:

WHAT IS AN ELECTROMAGNET?

HOW DOES IT WORK?

I think you’re not familiar with this thing.I’ve learned this thing when our teacher gave us an assignment about this. We experienced to understand electromagnet just by viewing or just by looking the simple diagram and a sample door knob given by our teacher. When we are about to understand the topic we found out what is the meaning of an electromagnet.

So, what is an electromagnet? For me an electromagnet powerful magnetic effect inside a coil. It works because an electric current produces a magnetic field. The magnetic field produced by an electric current forms circles around the electric current.

: http://upload.wikimedia.org

As you know the meaning of electromagnet, do you know how it works?

The basic idea behind an electromagnet as far as I know is extremely simple:

By running electric current through a wire,

you can create a magnetic field and

by using the simple principle.

Below is a sample video on how electromagnet works.

TRY TO HAVE FUN!

Investigate the magnets found in a

typical kitchen.

Try to pick up metal filings with

the electromagnet.

ELECTROMAGNETISM: USES OF ELECTROMAGNETS & ELECTROMAGNETISM

Now you know already what is the meaning of an electromagnet and how it works. Now, I'll show you the applications or functions of electromagnetism and electromagnet in our everyday life.

    Electromagnetism plays a fundamental role in speakers, microphones, car starters,
 doorbells, boilers,MRI's, household appliances and dialysis machines,cathode ray tube,
magnetic media for example.Electromechanical devices rely on electromagnetism to do such
operations as latching, pulling and lifting. Radios and television operate using electromagnetic waves.
X-ray machines are used in medicine and security. AC generators deliver electricity to buildings.
 Really it is plays an important role in our life.

USES OF ELECTROMAGNETS

Why did I choose this topic?

ischoolskathleen — Tue, 17 Nov 2009 09:39:50 +0000

I choose electromagnetism as my topic because I have my own experiences with it and I learned so far about this topic.

I so like the topic for that I understand well the content, for that I have already the power to share it to others.

For this, people can understand well the topic by the used strategies I have planned for my first blog.

My main concern with this is that I want to share it to the teachers for the additional information in their lessons/lectures, guides, and demonstrations for their students.

I also want it to share to my co-students not only in our school but also to the other students who find difficulty in this topic.

I choose electromagnetism as my topic because I have my own experiences with it and I learned so far about this topic. I so like the topic for that I understand well the content, for that I have already the power to share it to others. For this, people can understand well the topic by the used strategies I have planned for my first blog. My main concern with this is that I want to share it to the teachers for the additional information in their lessons/lectures, guides, and demonstrations for their students. I also want it to share to my co-students not in our school but also to the other students who find difficulty in this topic.