Prefix is a kind of word used before the name of an SI unit to get a bigger value or a smaller value of the unit. Three common prefixes are : kilo, centi and mili. The length is the distance between two points. Meter is a used as a standard unit for measuring the length of an object. We measure the length of an object by using a meter scale. A meter scale is graduated or marked in centimeters and every centimeter is further divided into 10 divisions called millimeters.
The type of unit used depends on the magnitude of the length to be measured. One mm millimeter is the smallest length which can be measured accurately by using a meter scale. The distances between two cities are very large. The various types of devices which are commonly used for measuring length are : meter scale and measuring tape.
A meter scale is made of metal and can not be bend. The rulers are made of plastic, wood or metal and also can not bend. The measuring tape is however made of flexible material which can bend easily around the object which has to be measured. For example: the length of a table can be measured by using a meter scale or a measuring tape.
A cloth seller uses a meter rod for measuring cloth. For example: a the girth of a tree can be measured only by using a measuring tape because measuring tape can be bent around the tree. We can not use an elastic measuring tape to measure lengths. This is because an elastic measuring tape can stretch easily while taking measurements and hence give a wrong value greater value of length of an object than its actual length.
So, though a measuring tape is flexible but it is made of non stretchable material. A ruler is a short scale marked in centimeters and millimeters. These rulers are usually made of plastic, Scales made of metal or plastic are also available in the market. The precautions to be taken while using a meter scale to measure lengths are as follows :. It should also be in touch with the object being measured.
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Maps you can make use of Basically, it is a long tape measuring more than feet encased or wound in a plastic body. Now, you might argue that measuring wheel is better for long distances. Komelon Open Reel Fiberglass Feet. The tape reel can be made of fiberglass or nylon material. This device has a calibrated wheel attached to the handle. All you have to do is roll it from starting point to the end point and read the numbers on the counter to read the measurement of the distance traversed by the wheel.
Rolatape RT inch Measuring Wheel. The measuring wheel is perfect when you want to measure long distances. They are perfect for measuring building lot sizes, perimeter of the garden, fence estimation and pavement. And, usage is fairly straight forward. It also is perfect when the distance to be measured is not linear.
For example, to measure the perimeter of a lot with the tape measure you will have to get the length and breadth first. And, if the plot is crooked, you will need four measures and then will have to add it up to get the answer.
However, with the measuring wheel, all you have to do is roll along the perimeter by starting from one point and ending at the same point. However, modifications are made to the base model to make it well suited for the particular job. Last but not least we have on our list is laser tape measure , which is the newest entrant in the distance measurement niche. It is an accurate and precise alternative to the traditional measuring tapes. This measuring tool uses optics and laser physics to give accurate measurements.
It works on phase shift principle, in which the reflection of the outbound laser beam and the time it takes to register the reflected pulse is used to measure the distance laser beam has traversed.
The usage of laser tape measure is also fairly simple. You have to place the device at the starting point of the distance you want to measure and aim the laser beam at the object in the end. It can be wall, pole or anything. Once you have placed the tool at the right point, just hit the button and the device will flash calculation on the screen.
Depending on how much money you have paid, the laser measure can display measurement in single or multiple units.
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