问题
选择题
质量为450kg的冰完全熔化为水时,体积变化是( )
A.增大4.5m3
B.减小4.5m3
C.减小0.05m3
D.增大0.05m3
答案
冰的体积V冰=
=m ρ冰
=0.5m3,450kg 0.9×103kg/m3
水的体积V水=
=m ρ水
=0.45m3,450kg 1000kg/m3
减小的体积△V=V冰-V水=0.5m3-0.45m3=0.05m3.
故选C.
质量为450kg的冰完全熔化为水时,体积变化是( )
A.增大4.5m3
B.减小4.5m3
C.减小0.05m3
D.增大0.05m3
冰的体积V冰=
=m ρ冰
=0.5m3,450kg 0.9×103kg/m3
水的体积V水=
=m ρ水
=0.45m3,450kg 1000kg/m3
减小的体积△V=V冰-V水=0.5m3-0.45m3=0.05m3.
故选C.