A substance that reveals, through characteristic color changes, the degree of acidity or basicity of solutions.
Could also be a light to notify of a components operation.
No, mileage is usually calculated either by a trip computer (if so equipped) or manually by dividing the number of miles traveled, as indicated on the trip meter, by the amount of fuel put into your...
No, not always. Some indicators are better suited for certain ranges; UI will provide a rough indication across a huge range, but other indicators can be more accurate across a small range, and this...
A universal indicator shows both sides of the pH scale whereas other indicators such as phenolphthalein shows alkalis as pink but neutral and acids as clear