Ascientist working in a lab wants to determine the precise ph of a solution. which tool should the scientist use to measure ph?

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?

During an experiment, readings for blood pressure in a persons body were found to be constant . however , when he measured by a different blood pressure cuff , the readings differed by 15 points for each reading. this difference indicates that the results are

2. which is the last step in the scientific method?