Depends on the liquid, and how much you have, and how accurately you want to measure it. In general, for normal amounts of a liquid, you can measure it accurately enough with a graduated cylinder. If you are certain what liquid it is, or if you have a LOT of it, you weigh it, because you know (or can look up) the density of the liquid.
For example, if you're talking about an airliner, we measure fuel in pounds. We don't need to know how much fuel to the nearest ounce; to the nearest couple of hundred pounds is close enough.
In medical use, we generally use a graduated cylinder, or for medicines themselves, graduated syringes - or sometimes, in drops.
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To accurately measure a liquid, use a liquid measuring cup with clear markings in milliliters or fluid ounces. Ensure the cup is placed on a flat surface, then pour the liquid slowly until the desired measurement is reached at eye level. Avoid tilting the cup to prevent inaccurate readings.
A thermometer is used to measure temperature accurately by containing a liquid that expands and contracts with changes in temperature. The liquid rises or falls in a narrow tube, showing the temperature on a scale. The thermometer is calibrated to ensure accurate readings.
A graduated cylinder, measuring cup, or beaker can be used to measure liquid volume accurately. It is important to use the correct measuring tool and ensure the meniscus (the curved surface of the liquid) is at the correct measurement line for accuracy.
A graduated cylinder is one of the most accurate tools to measure liquid volume. It has clear markings for precise measurements and is designed for accurately measuring liquids.
To measure the volume of a liquid accurately, it is important to read the meniscus at eye level.
A thermometer measures temperature accurately by using a liquid, such as mercury or alcohol, that expands or contracts based on the temperature. This causes the liquid to rise or fall in a narrow tube, which is marked with a scale to show the temperature.