An amount of nitrogen undergoes a physical change and increases its volume. what can be known about this physical change?

the boiling point of the nitrogen increased.
the mass of nitrogen increased.
the color changed.
the density changed.

Correct answer choice is :

D) The density changed.

Explanation:

Density is the number of mass placed in a particular volume. The density of an object can vary if either the mass or volume of the object is modified. Fluids, such as water, have a specific density. If an object is thicker than water, it will sink; if it is less thick than water, it will float. Maximum material rises in volume when it gets hotter. For instance, if an iron rod is ignited, it will get longer and thicker and its density will reduce. This occurs because the mass of the rod stays the equivalent, but its volume rises.

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.