Which of the following statements is true? the melting and freezing points of a substance are the same. the melting and boiling points of a substance are the same. the freezing and boiling points of a substance are the same. the heat of fusion and the heat of vaporization for a substance are the same.

The melting and freezing points of a substance are the same

Explanation:

Melting occurs when the state of a substance changes from solid to liquid, while freezing occurs when the state of a substance changes from liquid to solid. Therefore, melting and freezing are one the inverse process of the other: it means that they occur at the same temperature.

For instance, the melting point of ice (at standard pressure) is , and the freezing point of water is at the same temperature, .

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.