When the inflatable mattress is left in the hot sun for a few hours, it becomes firmer. Explain. Why?
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When an object is said to have no definite shape, it means that the object takes the shape of the container that it is placed in and is either a gas or a liquid. On the other hand, an object that is in the solid state has definite shape and does not take the shape of the container that it is placed in.
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