A hollow aluminium sphere of mass 150 kg floats on water. It is observed that an additional mass of 30 kg is required to just submerge it at a temperature of 15°C. If gamma_("water") = 150 xx 10^(-6) //""^(@) C, alpha_(At) = 23xx10^(-6) //""^(@) C How much less mass is required to submerge the sphere, if the temperature is at + 35^(@) .

A hollow aluminium sphere of mass 150 kg floats on water. It is observ

1.	A hollow aluminium sphere of mass 150 kg floats on water. It is observed that an additional mass of 30 kg is required to just submerge it at a temperature of 15°C. If gamma_("water") = 150 xx 10^(-6) //""^(@) C, alpha_(At) = 23xx10^(-6) //""^(@) C How much less mass is required to submerge the sphere, if the temperature is at + 35^(@) .
Answer» 30 kg 20 kg 291.6 gm 30 gm Answer :C