Answer: *Scientists can easily classify mixtures of unknown substances.
*Engineers can design better bridges because they know how metal changes shape.
*Engineers can design safer structures because they understand the flammability of building materials.
Step-by-step explanation:
Physical properties of the material can be define as the properties which can be observed or measured without changing the composition of the material. These properties includes texture, odor, color, boiling point, density, polarity, solubility, melting point, and others.
*Scientists can easily classify mixtures of unknown substances. : The mixtures of the metals can be separated by their physical properties such as color, shape and size of the metal particles.
*Engineers can design better bridges because they know how metal changes shape.: The change in shape is a physical property, understanding this property can help the engineers to design the bridges better.
*Engineers can design safer structures because they understand the flammability of building materials. :
Flammability is indicating towards the melting point of the building materials. Thus engineers must design the materials which is safe from flammability and must have a high melting point.