heat transfer question, show equations, assumptions, calculations and steps clearly. will give thumbs up rating if solved...

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Mechanical Engineering

heat transfer question, show equations, assumptions,calculations and steps clearly. will give thumbs up rating ifsolved correctly in 30 minutes

part a:

One of your hands is in still air at room temperature while theother one is in still water also at room temperature. Which handwill feel colder and why?

part b:

Why does sunscreen lotion prevent you from getting sunburn, butnot from feeling the heat from the sun?

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