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what is the advantage of potassium iodate as aprimary standard
what is the advantage of potassium iodate as aprimary standard
Primary standard can be defined in metrology, as a standard that is accurate enough that it is not calibrated by or subordinate to the other standards. Primary standards are used to calibrate other standards.
A person at a lower level of working eg. pump attendant and store clerk.
The value of old comic books varies wildly. It depends on their rarity, condition, and desirability from collectors. A quick way to gauge value is to look at auctions on eBay to see what people are selling the issue for. Be sure to look for actual sales, not just listings. Note that condition can greatly affect price: you may find the same issue listed for anywhere from a couple of dollars to hundreds of dollars. The Overstreet Comic Book Price Guide is widely considered aprimary authority on the comic book pricing and grading.