ρ雪=1.0× 10^3 kg/m^3（因为雪是固态水,所以雪的密度=水的密度）V雪=100m² × 0.3m =30m^3则m雪=ρ冰×V雪=1.0× 10^3 kg/m^3 ×30m^3=3.0× 10^4kgG=mg=3.0× 10^4kg× 10N/kg=3.0× 10^5N先算出雪的体积,用...