The length of the rod will become exactly half of its original value.
The length of the rod remains the same.
The length of the rod will decrease.
The length of the rod will increase.
Wouldn't the length double, thus being answer D?
Actually, the correct answer is B: "The length of the rod remains the same."
When an object doubles in length, it means that its length is multiplied by 2. So, if the length of the rod were to double, it would become twice its original length.
However, the given statement mentions that "The length of the rod will become exactly half of its original value." This means that the length of the rod would be divided by 2, resulting in it being reduced to half of its original length.
Therefore, the length of the rod will not double (answer D), but instead remain the same (answer B).