please provide compleate solution, thanks!

Problems 1. 10. 11. 12. Merlinda is heating 2-kg water initially at 6.5 \"C using a 100-Watt solar-powered heater. How long will it take (in seconds) to reach the boiling point? 0.1 kg aluminum calorimeter contains 0.2 kg water at 70.6 C. It is found that the temperature of the calorimeter and water drops to 20C in 15 minutes. What is the rate of heat flow to the atmosphere? The average human power is about 150 W. If this power is somehow convertible to heat current by using some sort of a 100% efcient machine, a] How long will it take [in minutes] to heat-up 0.1 kg coffee (C = 4000 \"kg/.9) by 80 C'? b) Would it be economical and convenient to use this method? Explain your answer. A 0.2-m thick metal conducts 16350 W of heat per square meter. If the difference in temperature between the hot side and cold side is 30 C\