Dr. Troy Mensen is a family medicine doctor based in the Chicago area. He completed his undergraduate degree at the University of Northern Iowa and his doctorate at Des Moines University College of ...

Density is a fundamental concept in chemistry that describes the relationship between mass and volume of a substance. This video offers a thorough explanation of density, its significance, and how to ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Breast density is a hot topic in women's health right now thanks to a new rule from the Food and Drug Administration (FDA) that went into effect in September. Under the rule, all women who get a ...

Copper atoms are larger than aluminum atoms. There are fewer copper atoms than aluminum atoms in the cubes. Copper atoms are much more massive than aluminum atoms. The extra mass makes copper more ...

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