Hostile Witness. A witness at a trial who is so adverse to the party that called him or her that he or she can be cross-examined as though called to testify by the opposing party. The Federal Rules of Evidence provide that witnesses who are hostile, or adverse, can be interrogated through the use of leading questions. hostile witness
Polar wander. Polar wander is the motion of a pole in relation to a fixed reference frame. It can be used, for example, to measure the degree to which Earth's magnetic poles have been observed to move relative to the Earth's rotation axis.
By Anne Marie Helmenstine, Ph.D. Polar Molecule Definition: A polar molecule is a molecule containing polar bonds where the sum of all the bond's dipole moments is not zero.Examples: Water is a polar molecule.Carbon dioxide is made up of polar bonds, but the dipole moments cancel each other out and therefore is not a polar molecule.xamples: Water is a polar molecule. Carbon dioxide is made up of polar bonds, but the dipole moments cancel each other out and therefore is not a polar molecule.