Question

give reason: an empty paper cup catches fire but one with water in it does not​

Answer 1

Explanation:

the temprature of the paper cup does not reach its ignition temprature. Thus the paper cup does not burn. The paper cup containing water does not catch fire because water does not let the paper reach its ignition temperature, i.e. the lowest temperature at which a substance can catch fire

Answer 2

Answer:

because H2O is present and it cools it and in empty paper cup it cathes fire