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Ensure accurate measurements in a density experiment by using precise instruments, consistent methods, and accounting for errors.
To start with, use precise instruments for measuring mass and volume. For mass, a digital balance is ideal as it provides more accurate readings compared to an analogue scale. Ensure the balance is calibrated correctly before use. For volume, use a graduated cylinder or a measuring jug with clear markings. If the object has an irregular shape, use the water displacement method to find its volume accurately.
Next, maintain consistency in your methods. When measuring mass, always zero the balance before placing the object on it. For volume measurements, ensure you read the meniscus at eye level to avoid parallax error. If using the water displacement method, make sure the object is fully submerged without touching the sides of the container.
It's also important to account for potential errors. For instance, ensure the object is dry before measuring its mass to avoid adding the weight of any water droplets. When measuring volume, be aware of temperature changes as they can cause the liquid to expand or contract, affecting the accuracy of your readings.
Repeat your measurements several times and take an average to minimise random errors. Record all your data carefully and double-check your calculations. By following these steps, you can ensure your density experiment yields accurate and reliable results.
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