$解：(1)m_排=360\ \mathrm {g}-240\ \mathrm {g}=120\ \mathrm {g}$
$(2)V=\frac {m_排}{ρ_水}=\frac {120\ \mathrm {g}}{1.0\ \mathrm {g/cm}^3}=120\ \mathrm {cm}^3 \ $
$ρ_橘=\frac {m_橘}V=\frac {114\ \mathrm {g}}{ 120\ \mathrm {cm}^3}=0.95\ \mathrm {g/cm}^3 $
