<prompt> Translate the following text to EnglishTatizo la pili ni kwamba thamani ya kitengo cha muda huamuliwa kwa sehemu na muda wa kipindi cha jumla ambacho kitengo hicho kinashiriki.  <response>: The second, related problem is that the value of a unit of time is partially determined by the duration of the total period in which that unit falls. 