SAT Physics Preparation MCQ 320 PDF Download

MCQ: The specific latent heat of vaporization is 2.25 × 10⁶ J kg^-1.If a man generates 800 J of heat every second by running, and half heat is lost from the body by evaporation, what is the mass of water evaporated in a 2 hour running?

1. 2 kg
2. 1.28 kg
3. 3.2 kg
4. 1.67 kg