Robotic Sub To Dive Into Earth's Deepest Sinkhole

The earth's deepest sinkhole is in Mexico and it is called Zacatòn.

   [source: (Robotics Institute at Carneigie Mellon University)]

   "An underwater robot, shaped like a flattened orange, maneuvered 
    untethered and autonomously within a 115-meter-deep sinkhole during 
    tests this month in Mexico, a prelude to its mission to probe the 
    mysterious nether reaches of the world's deepest sinkhole."


   "But no one knows how deep Zacatòn goes. Human divers, descendin
    far below safe depths, have made it to 282 meters without reaching 
    bottom. Sonar doesn't work over long distances in the confines of 
    the cenote, and current measurements peter out at around 270 meters.

Autonomous operation means "independent of human control once it is under way." The robotic sub (which is named DEPTHX) has an "array of 56 sonar sensors - 32 with a range of 100 meters and 24 with a range of 200 meters - that send sonar beams out in all directions. DEPTHX uses the sonar data to detect obstacles and locate itself on a map, providing precise navigation in the pitch-black deep water."

  1. One meter equals 1.0936133 yard. Human divers discovered that Zacatòn is at least _______ yards deep.

  2. A football field had an end-line to end-line length of 91.44 meters. No or Yes: Zacatòn has a depth of at least three football fields.

  3. The average range of Zacatòn's 56 sonar sensors is __________ meters.

  4. 56 = 5 x 10^___ + 6 x 10^___

  5. No or Yes: 56 is the sum of six consecutive primes starting with 3 and ending with 17.

  6. No or Yes: The prime factors for 56 are 2^3 and 7.

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Creator: Gerald D. Thurman []
Created: 03 March 2007

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