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How can you obtain the cells ratio of surface area to volume?
If the cell has a simple geometric shape, there are formulae that can be used. Otherwise you need to measure the surface area and the volume.
Are longitude semicircle?
Yes.
How do you find the volume of a liquid the volume of a regular shaped object?
It doesn't really matter whether the contents is liquid or otherwise. Formulae for several regular shapes are known - you can use one of them. If you don't find the formula for a specific shape, you can use integration. This is covered in introductory calculus books; roughly speaking, it means dividing the shape into small pieces, for example, small rectangles. That's how many of the well-known formulae are obtained, as well.
What Does one means by the term Coherent derived units?
It means that the units are compatible with one another. For example, if the unit of length is the meter, the natural unit of volume is the cubic meter. That way, formulae like volume (of a rectangular box) = length x width x height or the well-known formula for the volume of a sphere will require no additional conversion factors. The same happens if the unit of length is the foot, and the volume is measured in cubic feet. However, if you measure lengths in feet and volume in gallons, then the units are not compatible (or coherent) with one another.
How are mixtures recognised by their names and formulas?
names and formulae how are they reconised
