PHYS 157 Study Guide - Midterm Guide: British Thermal Unit
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PHYS 157 Full Course Notes
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A professional level range for the home has a high-output 12,000 btu burner which delivers heat to the pot at a rate of 5,000 btu/hr. When you come back 30 minutes later, the pot is at a rapid boil. Given the temperature versus time graph below: how much water (in litres) was in the pot at the start, what mass of water boiled off? (changed into water vapor?) Data: ccopper = 390 j/kg k kcopper= 385 w/m k cwater = 4190 j/kg k. Water at start (n. m litres): n: m: . Water boiled off (n. m kilograms): n: m: . A block of cast iron was wrapped in the thin aluminum foil as shown on the figure 1. At room temperature there is no stress on the foil. The whole system is then immersed in liquid nitrogen at - 196 c. Find the stress on the aluminum foil.
