Suppose you want to test if a sample compound is ionic. You have these materials: the solid compound, a glass container, a spoon, and a conductivity apparatus. What material is missing from your list, and why is it necessary?

The answer is as follows in the photo

When is this

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.