35. In hydrotherapy training at KMU, a therapist measures a patient's body density using underwater weighing. A patient has a mass of 75.0 kg in air. When fully submerged in water, the apparent mass is 3.0 kg. Assume water density ρ = 1.0 g/cm³ and neglect lung air volume changes. What is the patient's body density?
(A) 0.960 kg/m³
(B) 1.042 kg/m³
(C) 960 kg/m³
(D) 1042 kg/m³
(E) 1120 kg/m³

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統計: A(0), B(1), C(0), D(0), E(0) #3853550