The nearest star to the earth is the red dwarf star proxima centauri, at a distance of 4.218 light-years. convert this distance to barleycorns. (1barleycorn=1/3 inch.)

Explanation:

The nearest star to the Earth is the red dwarf star Proxima Centauri, at a distance of 4.218 light-years.  

Light year is the unit of distance covered by the heavenly bodies. 1 light year is equal to :

So,

We need to convert 4.218 light-years barley corns.  

Since, 1 barleycorn = 1/3 inch  

So, the nearest star to the Earth is at a distance of . Hence, this is the required solution.

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i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!