A bubble having a diameter of 76 cm is released from a depth of 4.7 m from the bottom of a swimming pool. The density of water is 1000 kg/m3. The temperature of the water at the surface is 19?C, whereas it is 16?C at the bottom. The acceleration of gravity is 9.8 m/s2 . What will the diameter of the bubble be when it reaches the surface?