In honor of Halloween, answer the following about Caribbean entries in user Geodesaurus’s yearly October TikTok series “Spooky Lake Month,” for 10 points each.
[10m] A 2020 entry covered this island’s natural lake of pitch, or asphalt. Calypso music was likely created on this island in cities like Port of Spain, which is the capital of a nation with this island listed first in its name.
ANSWER: Trinidad [or Iëre or Kairi; reject “Trinidad and Tobago”]
[10m] What dimensionless quantity equals the ratio of inertial and viscous forces? This quantity is more than a few thousand in turbulent flow.
ANSWER: Reynolds number [or Re]
[10e] A 2021 entry detailed the non-lake bioluminescent Mosquito Bay on Vieques (“vee-AY-kess”), an island east of this larger island formerly home to a radio telescope at Arecibo. San Juan is the capital of this US territory.
ANSWER: Puerto Rico [or Borinquen or Borikén]
[10e] This type of flow, contrasted with turbulent flow, occurs at low Reynolds numbers. This type of fluid flow contains layers that move smoothly and experience little or no mixing.
ANSWER: laminar flow
[10h] Entries in 2020, 2023, and 2024 have concerned these water-filled sinkholes in Karst topography, which due to their frequency in the Yucatán Peninsula have a Spanish name likely derived from Mayan.
ANSWER: cenotes (“say-NO-tays”)
[10h] Assuming laminar flow and this condition, the Hagen–Poiseuille (“HAH-gin pwah-ZOY”) equation gives the pressure drop of a fluid in a pipe. Water approximately obeys this condition in which the divergence of velocity equals zero.
ANSWER: incompressibility [or incompressible flow]
<Editors, Geography>