In this cycle, a circulating refrigerant such as Freon enters the compressor as a vapor. From point 1 to point 2, the vapor is compressed at constant entropy and exits the compressor as a vapor at a higher temperature, but still below the vapor pressure at that temperature.
Last Name Meanings and Origins. Uncover the meaning and origin of your last name, then learn how to create and preserve your own family history for generations to come. Nichols Last Name Meaning. 1. English and Dutch: patronymic from Nichol. 2. Jewish (American): Americanized form of any of various like-sounding Jewish names. From: The Oxford Names Companion, Oxford University Press.
The Jeffries surname is a patronymic name that comes from the personal names Geoffrey and Godfrey. These names appear in Old English as Geffrey and in Old French as Jefroi or Jeufroi. The surname Jeffries makes use of the patronymic suffix -son, which had superseded all other such suffixes in popularity by the 14th century, and was most common in the north of Britain. This suffix was sometimes abbreviated to -s.