How has ability to generate images of the inside of a person's body may have advanced our understanding of diseases and improved every diagnosis and treatment abilities

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution

What is the independent variable in this investigation? mass volume sample number substance density