Explain two applications of resonance

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in physics, resonance is a phenomenon in which a vibrating system or external force drives another system to oscillate with greater amplitude at specific frequencies. example a familiar example is a playground swing, which acts as a pendulum.

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Density and boiling point

Explanation:

There are properties of matter that do not change regardless of how much of the substance you have. The boiling point of a cup of water, for example is te same as the full kettle of water. These are called intensive properties. Examples include, but are not limited to, density , specific heat capacity , hardness, boiling point , color  etc