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Grammar & Sentence Structure
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Please advise me regarding the vowel usage in the following sentence:
"The photoluminescence quantum yield of a W-based polymer was 15 times higher than that of an Rh-based one."
Jul 31 2006 06:43:23
Are you asking why 'an' and not 'a'?
An is used before a vowel
not necessarily an actually written vowel. R is said as 'ar' or 'ah' - starting with an a sound.
Jul 31 2006 08:36:14
nona the brit
The use of an and a
Jul 31 2006 22:52:43
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