Question

Give an example of a physical entity that is not quantized, in that it is continuous and may have a continuous range of values.

Short answer

The Example for a physical entity that is not quantized is Time or Mass and the limits for these values can't be negative.

Step-by-step solution

Define entity is not quantized

To say that an entity is not quantized, means that there is no restriction on the values for this entity like time, mass, energy in classical mechanics

Entity is quantized or not

So, to say whether this entity is quantized or not, first we look to which frame we are working in. If we asking about these entities in the frame of classical physics (Macroscopic world), we will find that all the parameters are continuous and no limit for the values they can take.

Conclusion of the problem

But if you look at the quantum world, you will find that there are some quantities are quantized and others not like time and mass.

The Example is: Time or Mass.

Therefore, the limits for these values can't be negative.