why automobile tyres are inflated to lesser pressure in summers than in winters?
According to Gay Lussacs law, at constant volume, pressure of a fixed amount of a gas varies directly with the temperature.
As the temperature increases, the pressure also increases. In summer, due to the high temperature , the pressure inside the tyre also increases. and thus to prevent the bursting of the tyre, it is inflated to a slightly lesser pressure in summer.
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