Random question?

Which equipment will best separate a mixture of iron filings and black pepper?

Random question?

Which type of energy in gasoline is transformed into mechanical energy in a motorcycle engine?

Random question?

A student has a liquid that does not mix with water. To predict whether the liquid will float on water or sink beneath it, which tools should be used to examine the liquid?

Random question?
Sugar is added to water and the mixture is stirred. Which observation is evidence that the sugar dissolved in the water?