If you allow dry ice to stand in a ball at room temperature for several hours, what would be left?

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

If a simple machine aduces the strength of a force, what must be increased? the speed of the input force the work the simple machine performs the size of the simple machine the distance over which the force is applied

The image shows the process of which is used in nuclear power plants. photo attached