What should be the value of relative density of a substance so that it may sink in liquid?

Question

Answer

An object with relative density less than 1 will float...

An object with relative density more than 1 will sink

Answer

•RELATIVE DENSITY LESS THAN ONE- OBJECT WILL FLOAT.
For example- Object with relative density 0.93 will float.

•RELATIVE DENSITY MORE THAN ONE- OBJECT WILL SINK.
For example- Object with relative density 1.21 will sink

Answer

Relative Density and Sinking of a Substance in Liquid

Introduction:
Relative density, also known as specific gravity, is a measurement that compares the density of a substance to the density of a reference substance. It is a dimensionless quantity and is often used to determine whether a substance will sink or float in a given liquid. The relative density of a substance is typically expressed as a ratio or a decimal value.

Definition of Relative Density:
Relative density is defined as the ratio of the density of a substance to the density of a reference substance at a specified temperature and pressure. The reference substance is usually water for liquids and air or hydrogen for gases.

Factors Affecting the Sinking or Floating of a Substance:
The behavior of a substance in a liquid depends on its relative density. There are three possible scenarios:

1. Relative Density Less Than 1:
If the relative density of a substance is less than 1, it means that the substance is less dense than the reference substance. In this case, the substance will float on the surface of the liquid.

2. Relative Density Equal to 1:
If the relative density of a substance is equal to 1, it means that the substance has the same density as the reference substance. In this case, the substance will neither sink nor float, but remain suspended in the liquid.

3. Relative Density Greater Than 1:
If the relative density of a substance is greater than 1, it means that the substance is denser than the reference substance. In this case, the substance will sink in the liquid.

Value of Relative Density for Sinking:
For a substance to sink in a liquid, its relative density must be greater than 1. This indicates that the substance is denser than the liquid and will displace a smaller volume of liquid, causing it to sink.

Example:
Let's consider an example to illustrate this concept. If we have a substance with a relative density of 1.5, it means that the substance is 1.5 times denser than the reference substance (usually water). Therefore, when placed in water, the substance will sink as it is denser and will displace a smaller volume of water.

Conclusion:
The value of relative density determines whether a substance will sink or float in a liquid. A relative density greater than 1 indicates that the substance will sink, while a relative density less than 1 indicates that the substance will float. Understanding the concept of relative density helps in predicting the behavior of substances in different liquids and is essential in various scientific and practical applications.

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