If I put a pool of water on a scale and had someone get in the pool but not touch the bottom or any sides do they add weight to that pool?
The answer is no. When someone gets into a pool of water, they displace an equal amount of water. This means that the weight of the person is counteracted by the weight of the water that they displace. As a result, the overall weight of the pool does not change.
This principle is known as Archimedes' principle. It states that the upward force exerted by a fluid that opposes the weight of a partially or fully immersed object is equal to the weight of the fluid that the object displaces.
In the case of a person in a pool of water, the upward force is equal to the weight of the water that the person displaces. This upward force counteracts the person's weight, so the overall weight of the pool does not change.
Related Questions
What is Archimedes' principle? Archimedes' principle states that the upward force exerted by a fluid that opposes the weight of a partially or fully immersed object is equal to the weight of the fluid that the object displaces.
How does Archimedes' principle apply to a person in a pool of water? When a person gets into a pool of water, they displace an equal amount of water. This means that the weight of the person is counteracted by the weight of the water that they displace, so the overall weight of the pool does not change.
What would happen if a person touched the bottom or sides of the pool? If a person touched the bottom or sides of the pool, they would exert a downward force on the pool. This would cause the overall weight of the pool to increase.
What are some other examples of Archimedes' principle? Archimedes' principle applies to any object that is partially or fully immersed in a fluid. Some other examples include a boat floating in water, a submarine submerged in water, and a helium balloon floating in air.
How can Archimedes' principle be used to measure the volume of an object? Archimedes' principle can be used to measure the volume of an object by submerging the object in a fluid and measuring the amount of fluid that is displaced. The volume of the object is equal to the volume of the fluid that is displaced.
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