Where are all the references to floating or buoyancy in Tana"ch?
closed as too broad by WAF, Shmuel Brin, not-allowed to change my name, Bruce James, avi Dec 28 '13 at 18:39
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There's II Kings 6:6, ויצף הברזל (the iron [axe-head] floated up); this phrase, and Targum Yonasan's rendering of it as וקפא פרזלא, is quoted by Rashi over a dozen times in his commentary on the Gemara.
I may be misunderstanding the question, but you have a few merachef's:
וְרוּחַ אֱלֹהִים, מְרַחֶפֶת עַל-פְּנֵי הַמָּיִם
כְּנֶשֶׁר יָעִיר קִנּוֹ, עַל-גּוֹזָלָיו יְרַחֵף
As well as the Merkava (Yech. 1:19-21):
וּבְהִנָּשֵׂא הַחַיּוֹת מֵעַל הָאָרֶץ, יִנָּשְׂאוּ הָאוֹפַנִּים