## How do you make a semi-log graph?

Decide which axis you would like to make logarithmic: a logarithmic graph makes both axes logarithmic, while a semi-log graph makes only one of the axes logarithmic. Double-click that axis. Click on the “Scale” tab, then check the box corresponding to “Logarithmic Scale.” Your graph will now become semi-logarithmic.

**How do you make a semi-log graph in Excel?**

To put this chart on a semi log axis, right-click on the Y axis, and select “Format Axis” from the menu. Click on the “Scale” tab at the top of the window. Now check the “Logarithmic Scale” box at the bottom of the window, then click “Ok”. Your chart should now look something like this.

**Why do we use semi-log graph for sieve analysis?**

In view of the very range of soil particles sizes, a semi-logarithmic scale becomes necessary. . Further, semi-log has merits that soils of equal uniformity exhibit the same shape of grain size curve, irrespective of the particle size fractions present in soil.

### What is 0.45 power gradation chart?

A way you can look at that is looking at a gradation plotted on the 0.45 power curve. The 0.45 power curve plots the percentage passing cumulatively of an aggregate size on the Y axis, and on the X axis we have the sieve size, corresponding sieve size, raised to the 0.45 power.

**What is the difference between a log-log and a semi-log graph?**

In a semilogarithmic graph, one axis has a logarithmic scale and the other axis has a linear scale. In log-log graphs, both axes have a logarithmic scale.

**Why do we use a semi-log graph paper for grain size analysis?**

## What is coefficient of uniformity?

uniformity coefficient (u-ni-form’-i-ty). A numerical expression of the variety in particle sizes in mixed natural soils, defined as the ratio of the sieve size through which 60% (by weight) of the material passes to the sieve size that allows 10% of the material to pass.