Which of the following is true about a solid floating with a part of it in the fluid?

1. The overall density of the solid is greater than the density of the fluid.

2. The weight of the displaced fluid equals the weight of the solid.

Choose the correct code:

Concept:

Archimedes principle:

• It states that a body when wholly or partially immersed in liquid experiences an upward thrust that is equal to the liquid displaced acts on it.
• Archimedes Principle is also known as the physical law of buoyancy.
• When a solid is fully immersed in a liquid, it loses weight, which is equal to the weight of the liquid it displaces.

Explanation:

• Archimedes' principle is used to explain the law of floatation.
• According to the Archimedes principle, a body continues to float, if the weight of the body is equal to the weight of the fluid by it.
• If the density of the body is greater than that of the fluid, it will sink.
• If the density of the body is lesser than that of the fluid, it will float.

Thus, the correct statement is only 2.

Key Points

•  The hydrometer basically consists of a weighted, sealed, long-necked glass bulb immersed in the measured liquid, the flotation depth shows the liquid density, and the neck can be calibrated to read the actual gravity value.
• A hydrometer used for determining the density of liquids is based on Archimedes' principle.