The caffeine content of coffee varies greatly, depending on the beans, how they're roasted, and other factors, but the average for an 8-ounce cup is about 100 milligrams (mg).
No, 'cat' is a common noun, a word for any cat of any kind. A proper noun is the name of a person, a place, a thing, or a title; for example: Cat Deeley, host of TV series 'So You Think You Can Dance'.
It is common name , that can be applied to any one of a class just mentioned. Hence it is a Common Noun. A Proper Noun is name of a particular person , Place and or thing.âHolidayâ does not come under the purview of this definition. Hence it is not a Proper Noun. There are examples where a Proper Noun can be used as a Common Noun. Ex: He is a Hercules.