Consider there are two walls, A and B, that are made with the same temperature drop across their thickness. It has been experimentally determined that the ratio between the thermal conductivities (kA/kB) and surface areas (AB/AA) are 5 and 2.125, respectively. If the wall thickness ratio between A and B is 3 , determine the ratio of heat transfer rates through the walls. [15 marks] c. You have placed iced water (0C) into a cylindrical aluminum bottle with dimensions (diameter and length) of 10cm and 33.3cm, respectively. Wind (at 45C ), which is controlled by a fan flow over the cylindrical bottle at the velocity of 25km/h. Determine the rate of heat loss from the cylindrical bottle and the rate at which the ice melts in kW and kg/h, respectively, if the latent heat of fusion of ice equals 333.7kJ/kg. You may assume that (1) wall thickness can be neglected so that the temperature of the ice water is the same as the surface temperature; (2) heat loss at the flat ends can be neglected