Which of these is a mixture of a solid that is soluble in water and a solid that is insoluble in water?
a) iron and steel
b) salt and sugar
c) iron and gravel
d) gravel and sugar

Can smoke be transformed into liquid or used as energy or both?

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.