Physical properties are those with which

A physical property is a characteristic of matter that is not associated with a change in its chemical composition.

Explanation:

A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.

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Physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.

Explanation: Pretty self explanatory I think but I hope it helped.

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

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