Ahuman subject with mass 96 kg, body specific heat 3500 jkg^-1k^-1 skin temperature 34.5 degrees celsius, surface area 1.5m^2 and emissivity 0.7 enters a room whose walls are at temperature 21 degrees celsius. at what rate does body temperature decrease? answer in degrees per hour, as a positive number

Awoman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. the book has a mass of m = 1.8 kg and the coefficient of static friction between her hand and the book is μs = 0.67. no attempt 50% part (a) what is the weight of the book, fgb in newtons?