Assertion: dry ice's temperature | /r/HasProperty | t ∞
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text: An ice surface in fresh water melts solely by free convection with a velocity that depends linearly on the water temperature, T ∞ , when T ∞ is less than 3.98 °C, and superlinearly when T ∞ is equal to or greater than 3.98 °C, with the rate being proportional to (T ∞ − 3.98 °C)α, with α = 5/3 for T ∞ much greater than 8 °C, and α = 4/3 for in between temperatures T ∞ .