Water displacement is calculated by measuring the change in water volume after an object is submerged, providing a way to find the volume of irregularly shaped objects.
Understanding Water Displacement
The principle behind water displacement is that when an object is immersed in water, it pushes aside (displaces) a volume of water that is equal to its own volume. By measuring the amount of water that is displaced, we can determine the volume of the object.
Steps to Calculate Water Displacement
Here’s a step-by-step guide on how to calculate water displacement, based on the provided reference:
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Initial Measurement: Start with a graduated cylinder and fill it with a known volume of water. For example, as the video reference describes, use 60 milliliters of water.
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Submerge the Object: Carefully place the object you want to measure into the graduated cylinder, ensuring it's fully submerged.
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Final Measurement: Observe the new water level after the object has been submerged. The water level will rise due to the object displacing water.
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Calculate Displacement: Subtract the initial water level from the final water level. The difference gives the volume of the water that was displaced, which is equal to the volume of the object.
Step Description Example 1. Initial Water Volume Measure water volume in the cylinder before adding the object. 60 mL 2. Final Water Volume Measure water volume after adding the object. 75 mL 3. Calculated Displacement Final Water Volume - Initial Water Volume = Object's Volume. 75 mL - 60 mL = 15 mL
Example Calculation
- Suppose you start with 60 mL of water in a graduated cylinder.
- After submerging an object, the water level rises to 75 mL.
- The volume of the object is calculated as follows: 75 mL - 60 mL = 15 mL.
Therefore, the volume of the object is 15 mL.
Key Takeaways
- Water displacement is a practical method for finding the volume of irregularly shaped objects.
- The displaced volume of water is equal to the volume of the submerged object.
- A graduated cylinder is a useful tool for accurate water volume measurements.
- Ensure the object is fully submerged and that the water level is read accurately for precise measurements.
