Problem 5 If you ever slapped someone or got slapped yourself, you probably reme

Question

Problem 5
If you ever slapped someone or got slapped yourself, you probably remember the burning
sensation on your hand or your face. Imagine you had the unfortunate occasion of being
slapped by an angry person, which caused the temperature of the affected area of your
face to rise by 1.8 °C. Assuming the slapping hand has a mass of 1.2 kg and about 0.150
kg of the tissue on the face is affected by the incident, estimate the velocity of the hand
just before impact. To do so, identify your system, draw a sketch, and describe your
engineering model (list all simplifying assumptions). Take the specific heat of the tissue
(assumed to be incompressible) to be 3.8 kJ/kg.°C

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