List the evidence that a chemical change has occurred. (5 forms of evidence)

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?

What is the standard unit of measure for acceleration?

Particles vibrate in a rigid structure and do not move relative to their neighbors.