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Glossary of terms you will come across during your Phase 2 training.



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A force is defined simply as a push or a pull.

A more comprehnesive definition is: A force is that which causes or prevents movement, or changes the direction of existing movement.

Force is measured in Newtons, after Sir Isaac Newton, who wrote Newton's three laws of motion.

Electrical force is known as voltage. A small force would be something like 4 volts. A large force would be something like 500 volts.

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Software that is protected by copyright, but is made available to the public free of charge.
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Term used to describe a computer that has "frozen" in operation. There may or may not be error messages on display, but the computer does not respond - the computer "freezes". Often, the only solution is to re-boot the computer. This involves the loss of any unsaved material you may be working on at the time.
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1 kilobyte = 1024 bytes. Don't get confused here! The prefix kilo normally means one thousand, but when we are dealing with bits and bytes, we are dealing with binary numbers, and in this case 210, which is:

2x2x2x2x2x2x2x2x2x2=1024.

This type of stuff is covered during your electronics training.

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The measurement of the amount of matter in a body. It is measured in kilogrammes.
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A file format popular for saving music. Sound files on computers such as music can be very large. This gives problems when you want to run them, or make them available over the internet. One solution is to compress them, but this leads to a loss of quality. MP3 is a format that reduces file sizes, but keeps the drop in quality to a minimum.
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Also sometimes referred to as "Nibble"

4 binary digits (bits) = 1 nybble (or nibble).

For example, 1101 is a nybble.

Keyword(s):
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Short for Numeral Lock. This is a toggle key which allows the keypad at the right of the keyboard to be used to input numerals. When the Num Lock is engaged, a warning diode will glow and the keys will act as numbers. When the lock is disengaged, the keys assume other functions.
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Power is a measure of the rate at which work is done. Work is Force x Distance, and if we measure this per second, we are measuring power. Power is measured in Watts. The unit of measurement gets its name from James Watt.
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1: When used in the context of monitor screens, this is the number of times per second a screen is redrawn on the monitor. A typical figure would be 75 times per second. Each refresh is a cycle, so this refresh rate would be written as 75 Hertz.

2: When used in the context of websites, you may need to refresh your screen from time to time, to ensure you are viewing the most up to date information available. This would be especially necessary when viewing sites such as airport arrivals and departures pages.


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