Science / Tides and Currents / Ekmanspiral
Ekmanspiral : A logarithmic spiral (when projected on a horizontal plane) formed by the heads of current velocity vectors at increasing depths. The current vectors become progressively smaller with depth. . . . View Full Definition
Permanence Tests: Methods of establishing whether long term permanence of an image has been achieved.
Permanent Current: A current that runs continuously and is independent of tides and other temporary causes. Permanent currents include the general surface circulation of the oceans.
Permalloy Tape Head: A cassette tape head constructed of permalloy, an alloy made primarily of nickel and iron, used for its superior high wear resistance and permeability, offering superior frequency response a . . . View Full Definition
Word of the Day:
Fragrance: The sensation of the gases released from ground coffee as they are inhaled through the nose. Ranges from sweetly floral to sweetly spicy.