10. [-/3 Points] DETAILS SERCPWA11 11.WA.010. MY NOTES PRACTICE ANOTHER In a physics lab students are conducting an experiment to learn about the heat capacity of different materials. The first group is instructed to add 1.5-g copper pellets at a temperature of 92C to 295 g of water at 16.C. A second group is given the same number of 1.5-g pellets as the first group, but these are now aluminum pellets. Assume that no heat is lost to or gained from the surroundings for either group (a) If the final equilibrium temperature of the copper pellets and water is 25C, how many whole pellets did the first group use in the experiment? The specific heat of copper is 0.0924 kcal/(kg . .C). pellets (b) Will the final equilibrium temperature for the second group be higher, lower, or the same as for the first group? The specific heat of aluminum is 0.215 kcal/(kg . C). O higher lower O the same (c) What is the equilibrium temperature of the aluminum and water mixture for the second group? OC PRACTICE ANOTHER SERCPWA11 11.WA.049. MY NOTES 11. [-/2 Points] DETAILS Suppose you walk into a sauna that has an ambient temperature of 51.5.C. (a) Calculate the rate of heat transferred to you by radiation given your skin has a temperature of 37.0C, an emissivity of 0.98, and the surface area of your body is 1.40 m2. W (b) If all other forms of heat transfer are balanced (net zero), at what rate will your body temperature increase if your mass is 56 kg? (Assume 3500 J/(kg . .C) is the specific heat of the human body.) .C/min MY NOTES PRACTICE ANOTHER 12. [-/1 Points] DETAILS SERCPWA11 11.WA.038. Two teenagers and their parents are vacationing at the beach. After a hot day out on the sands, they come in and take showers at the same time. The maximum power output of the hot water heater is 33 KW and when all 4 showers are turned on simultaneously, the water flows at a rate of 1.23 x 10-4 m3/s in each of the bathrooms. If the water flowing out of each showerhead is at 19.3.C, what is the temperature of the water going into the heater? The specific heat of water is 1 kcal/(kg . C). OC MacBook Air DII DD F12 388 F9 F10 F6 F7 F8 esc F3 F4 A a O O 2 612. [-/1 Points] DETAILS SERCPWA11 11.WA.038. MY NOTES PRACTICE ANOTHER Two teenagers and their parents are vacationing at the beach. After a hot day out on the sands, they come in and take showers at the same time. The maximum power output of the hot water heater is 33 kW and when all 4 showers are turned on simultaneously, the water flows at a rate of 1.23 x 10-4 m3/s in each of the bathrooms. If the water flowing out of each showerhead is at 19.3.C, what is the temperature of the water going into the heater? The specific heat of water is 1 kcal/(kg . C). OC 13. [-/2 Points] DETAILS SERCPWA11 11.WA.041. MY NOTES PRACTICE ANOTHER (a) What is the rate of heat conduction through the 3.50-cm-thick fur of a large animal having a 1.23-m surface area? Assume that the animal's skin temperature is 32.0C, that the air temperature is -5.00C, and that fur has the same thermal conductivity as air (0.023 J/(s . m . C)). W (b) What food intake will the animal need in one day to replace this heat transfer? Ca MY NOTES PRACTICE ANOTHER 14. [-/1 Points] DETAILS SERCPWA11 11.WA.043. Calculate the rate of heat conduction out of the human body, assuming that the core internal temperature is 37.0.C, the skin temperature is 32.8.C, the thickneke of the tissues between averages 1.00 cm, and the surface area is 1.80 m. The conductivity of tissue is 0.20 J/(s . m . C). W Submit Assignment Save Assignment Progress Home My Assignments MacBook Air DII DD F12 F10 F11 20 388 F5 F7 F8 F9 F6 esc F1 F2 F3 F4 & del a # O 6