Think about this: how could you devise an easy foolproof way to determine if an object was made of pure gold other than finding the density of the actual object? hint: use the beaker of liquid. briefly explain your method. *

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?

How have the greenhouse gasses increased from the year 2000 to 2018

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles