Within a gravity-free hall, an ice cube is suspended in a vacuum. As the ice melts, it

Step-by-step solution

In a gravity-free environment, the effective acceleration due to gravity is zero. Thus, the ice cube will neither fall down nor fly upwards. As the ice melts into water, the intermolecular forces, specifically surface tension, become the dominant force acting on the liquid. To minimize its surface energy, the liquid tends to acquire the shape with the minimum surface area for a given volume, which is a sphere. Therefore, the melting ice will change its shape to a sphere.