what is convention ?

@Pooja, Your friend has answered your question correctly.

Hope you got it.

@Abhishek, We appreciate your contribution.

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 A convention is a set of agreed, stipulated or generally accepted standardsnormssocial norms or criteria, often taking the form of a custom.

Certain types of rules or customs may become law and regulatory legislation may be introduced to formalize or enforce the convention (for example, laws that define on which side of the road vehicles must be driven). In a social context, a convention may retain the character of an "unwritten" law of custom (for example, the manner in which people greet each other, such as by shaking each other's hands).

In physical sciences, numerical values (such as constants, quantities, or scales of measurement) are called conventional if they do not represent a measured property of nature, but originate in aconvention, for example an average of many measurements, agreed between the scientists working with these values.A convention is a set of agreed, stipulated or generally accepted standardsnormssocial norms or criteria, often taking the form of a custom.

Certain types of rules or customs may become law and regulatory legislation may be introduced to formalize or enforce the convention (for example, laws that define on which side of the road vehicles must be driven). In a social context, a convention may retain the character of an "unwritten" law of custom (for example, the manner in which people greet each other, such as by shaking each other's hands).

In physical sciences, numerical values (such as constants, quantities, or scales of measurement) are called conventional if they do not represent a measured property of nature, but originate in aconvention, for example an average of many measurements, agreed between the scientists working with these values.

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 for the transfer of heat, there are 3 types of mediums to transfer,and they are from the air,from the water and from the solids.

the medium in which the heat transfers through solids is called convection.

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oh sorry read the question wrong

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