Question

what is gay-lussac's law explain with two examples

Answer 1

Pressure-temperature law. This law is often referred to as Gay-Lussac's lawof pressure–temperature, between 1800 and 1802, discovered the relationship between the pressure and temperature of a fixed mass of gas kept at a constant volume. Gay Lussacdiscovered this while building an "air thermometer".
two example are
firing of bullet
burning of tire