9. An air bubble starts rising from the bottom of a lake. Its diameter 3.6 mm at the bottom and 4 mm
at the surface. The depth of the lake is 250 cm and temperature at the surface is 40°C. Then the
temperature at the bottom of the lake is (Neglect surface tension effect) (Given g = 980 cm/sec)
(A) 11.2°C
(C) 10.36°C
(D) 25°C
(B) 0°C
at the surface. The depth of the lake is 250 cm and temperature at the surface is 40°C. Then the
temperature at the bottom of the lake is (Neglect surface tension effect) (Given g = 980 cm/sec)
(A) 11.2°C
(C) 10.36°C
(D) 25°C
(B) 0°C
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