nsfw:racy: Likely ocr: a Swimming Quit Hydrofoils Animals wimming on the surface of water push Dolphin pushing the bow wave on the surface of water a wave in front of ther m, like the bow wave of a boat. The energy cost of forming this wave is a major] part ofthe energy cost of swimming. - The energy cost of wimmng at the surface and under water has been compared in experiments on penguins. Submerged Surface Speed (meters per: second) 0.72 0.72 Metabolic rate/ swi imming (watts) 9.3 14.0 Metabolicrate/ resting (watts) 7.2 7.2 Difference(watts) 2.1 6.8 Because submerged swimming of penguins produces no bow wave, it n ...
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