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Q: Why is the base line in chromatoghraphy drawn in pencil?
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What is the difference between a line a shape?

a line is a basic line drawn from a pencil a shape is a shape for example a star is a shape


Will a line drawn by a pencil conduct electricity?

Yes, pencil lines can conduct electricity to a certain extent, as the graphite in pencils is a form of carbon which can conduct electricity. However, it may not be as effective a conductor as other materials designed specifically for that purpose.


Why is the chromatograph line dawn in pencil and not ink?

The chromatograph line is drawn in pencil because pencil marks are more permanent and less likely to smudge when in contact with the organic solvents used in chromatography. Ink can dissolve or spread when exposed to these solvents, affecting the accuracy of the chromatogram.


How should a best-fit line be drawn?

There are clear mathematical procedures for calculating the slope and intercept of the "best-fit" line. Once those numbers are in hand, the line should then be drawn using a straight-edge and fine-point pen or sharpened pencil.


What is the material in a pencil?

The material in a pencil is typically graphite, a form of carbon that leaves a mark when drawn on paper. The graphite is mixed with clay to create the pencil "lead" that is encased in the wooden barrel of the pencil. The hardness of the lead can vary, producing different shades and line thicknesses.


Is the number 1 symmetrical?

Only if it's drawn as a straight line. If the horizontal line at the base, and the sloping line at the top are added, it is not symmetrical.


Where is the commitment line in slow pitch softball?

The commitment line is drawn perpendicular to the third base line 20 feet from the point of home plate.


Why should a pencil never be used as a tool when working inside a computer?

Because pencil has graphite lead, which is a good conductor of electricity. Hence to avoid the shock pencils are avoided.


Why is it important to use only a pencil to mark the starting line of the chromatogram?

This is so you can know the base line. The base line is used as the starting point for the mesaurements used for the Rf values. you need to know the distance from the base line to the point of the spot to know the Rf values. see related link below for more info about paper chromatography


How do you get the area of a parallelagram?

A = bh, where b is the length of the base (which can be any side of the parallelogram, and h is the length of the height (a perpendicular line drawn from one of the vertex to the base).


Is a pencil a line?

No it is not.


Is lead hard?

The "lead" in drawing pencils has various grades or hardness. The hardness of a drawing pencil is designated by a number and an H. The higher the number the harder the pencil is, the slower it wears done, the longer it retains its point, the less it smudges and the lighter the line is that is drawn. For example, 6H pencils are harder than 2H pencils. The softness of a pencil is designated by a number and a B. The higher the number the softer the pencil is, the faster it wears down, the easier it is to smudge and blend, and the darker the line is that is drawn. For example 8B pencils are softer than 2B pencils. There is a standard, middle of the road pencil, the HB pencil, sometimes called the Number two pencil. This has some of the drawing qualities of both hard and soft pencils and in a pinch will serve for most drawing and writing needs.