If you set out to explore the surface of the Moon, you would wear a thermally insulated space suit. In such activity, you might expect to generate roughly 4 kJ of heat per kilogram of mass per hour. If all this heat were retained by your body, how much would your body temperature increase per hour owing to this rate of heat production? (Assume that your heat capacity is roughly that of water) What time limit would you recommend for a moon walk under these conditions?