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First, make sure you have a laser pointer, and a protractor. You'll also need a black marker, calculator with tigonometry functions, an index card, several pieces of thin cardboard (cereal box or something similar), a sturdy box (preferably wooden), and a stack of books.

It's best to work near the edge of a table with good lighting. Anyway, place the CD, label side down, near the center of the workspace. Then put a piece of cardboard to the right of it, and another piece behind it. Both pieces should be about the same thickness as the CD itself. Place the box on top of all of this. If you want to avoid scratching it, put a piece of paper or tissue over the back half of the CD.

You can get the rest of the instructions from the site that my school uses: http://www.sciencebuddies.org/science-fair-projects/project_ideas/Phys_p011.shtml

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What component of the computer keeps track of the address in memory of the programming instruction being executed?

A stored-program computer at least needs to know which instruction it has to execute next. Other memory addresses of special significance are e.g. the top of one or more stacks, or addresses to be used by instructions.To keep track of such addresses, all CPUs have one or more registers; for instance the address of the next instruction is stored in the instruction pointer, a.k.a. program counter. Which and how many registers of a CPU are designated to keep addresses depends on the CPU type. The Z80 for instance has a program counter, a stack pointer, two index registers and an indirect address register doubling as 16 bit accumulator, while the contemporay 6502 only has a program counter and a stack pointer.


How does a tracker ball work?

Tracker Ball: A Trackerball is an Input Device.A tracker ball is a pointing device; it is a mouse lying on its back. To move the pointer, you rotate the ball with your thumb, your fingers, or the palm of your hand. There are usually one to three buttons next to the ball, which you use just like mouse buttons.


What is the name given to a part of circle on which data is written in a storage media?

track sector cyllnder spiral


What is peek search on a CD player?

This is when it plays the first few seconds of each track in turn to help you locate the track you want.


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It keeps track of the changes you make on the browser.

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By using Laser distance measuring devices, work by sending out a laser beam of light and tracking how long it takes for the beam to return to the device. It uses this information to instantly calculate the distance from the laser measuring tool to the object you selected with the beam. Not only does it display distances instantly and accurately, it can track measurements.


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A track ball mouse is a mouse that uses an internal ball to track movement, instead of a laser. These have been outdated by optical mice.


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The variants of computer mouse are: Track pads Trackballs and pointer Integrated Pointing Device


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