• mercury is a metal

  • density of mercury is greater than that of water

  • cohesion of mercury is greater than its adhesion with glass

  • cohesion of water is greater than its adhesion with glass

  • audio sounds

  • infrasonic

  • ultrasonic

  • supersonics

  • locating submerged submarines

  • receiving a signals in a radio receiver

  • locating geostationary satellites

  • detecting and locating the position of objects such as aeroplanes

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