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Assume the mostly infrared radiation from a heat lamp acts like a continuous wave with wavelength 1.50 µm.
(a) If the lamp's 185 W output is focused on a person's shoulder, over a circular area 25.0 cm in diameter, what is the intensity?
kW/m2
(b) What is the peak electric field strength?
kV/m
(c) Find the peak magnetic field strength.
µT
(d) How long will it take to increase the temperature of the 4.00 kg shoulder by 2.00°C, assuming no other heat transfer and given its specific heat is 0.830 kcal/kg·°C?
s
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When people sleep, their metabolic rate is about 2.6 x10-4 C/(s.kg). How numerous Calories does a 69 kg person metabolize while sleeping 9 hours.
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