This is from fundamentals of physics 8th edition halliday; Resnick.Chapter 18, problem 62. It has been answered, but i believe theyare absolutely wrong. The problem reads.
To withstand the harsh weather of the Antarctic, emperor penguinshuddle in groups. Assume that a penguin is a circular cylinder witha top surface area a=0.34m2 and height h = 1.1m. Let Pr be the rateat which an individual penguin radiates energy to the environment(through the top and the sides); thus NPr is the rate at which Nidentical, well-separated penguins radiate. If the penguins huddleclosely to form a huddled cylinder with top surface area Na andheight h, the cylinder radiates at the rate Ph. If N=1000, (a) whatis the value of the fraction Ph /NPr and (b) by what percentagedoes huddling reduce the total radiation loss?
This is from fundamentals of physics 8th edition halliday; Resnick.Chapter 18, problem 62. It has been answered, but i believe theyare absolutely wrong. The problem reads.
To withstand the harsh weather of the Antarctic, emperor penguinshuddle in groups. Assume that a penguin is a circular cylinder witha top surface area a=0.34m2 and height h = 1.1m. Let Pr be the rateat which an individual penguin radiates energy to the environment(through the top and the sides); thus NPr is the rate at which Nidentical, well-separated penguins radiate. If the penguins huddleclosely to form a huddled cylinder with top surface area Na andheight h, the cylinder radiates at the rate Ph. If N=1000, (a) whatis the value of the fraction Ph /NPr and (b) by what percentagedoes huddling reduce the total radiation loss?
