What is the specific heat capacity of a substance if 400 calories cause 25 grams of it to go from 60- 190 °Celsius? Express your answer in J/Kg °Celsius.
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- What is the specific heat capacity of a substance if 400 calories cause 25 grams of it to go from 60-
190 °Celsius? Express your answer in J/Kg °Celsius.
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- An electronics device generates 36.8 W of heat energy during normal operation. The heat is dissipated from the top surface of the device to ambient air at 23°C. If the top surface area is 0.174 m2 and the convection heat transfer coefficient is 7.365 W/m2· K, what will be the surface temperature (in °C) of the device [round your final answer to one decimal place]?A refrigerator door is opened and room-temperature air (20°C) fills the 1.50 m 3 compartment. A 10.0 kgm turkey, also at room temperature, is placed in the refrigerator and the door is closed. The density of air is 1.20 kgm/m3 and its specific heat is 1020 J / kgm °C. Assume the specific heat of a turkey, like that of a human, is 3480 J / kgm °C. How much heat must the refrigerator remove from its compartment to bring the air and the turkey to thermal equilibrium at a temperature of 5°C? Assume no heat exchange with the surrounding environment.A plastic cup of negligible mass contains 0.280 kg of an unknown liquid at a temperature of 30.0 °C. A 0.0270 kgkg mass of ice at a temperature of 0.0°C°C is added to the liquid, and when thermal equilibrium is reached the temperature of the combined substances is 14.0 °C°C. Assuming no heat is exchanged with the surroundings, what is the specific heat capacity of the unknown liquid? Express your answer in joules per kilogram-kelvin.
- An ice chest at a beach party contains 12 cans of soda at 4.41 °C. Each can of soda has a mass of 0.35 kg and a specific heat capacity of 3800 J/(kg C°). Someone adds a 9.77-kg watermelon at 23.4 °C to the chest. The specific heat capacity of watermelon is nearly the same as that of water. Ignore the specific heat capacity of the chest and determine the final temperature T of the soda and watermelon in degrees Celsius.The R value of fiberglass batting, 3.5 inches thick, is 11 ft2x°Fxh/BTU. What is the thermal conductivity (in BTU/ftx°Fxs)? 7.4' 10-6 2.7' 10-² 8.9 10-5 1.410-4 3.6 10-3When the indoor temperature of a house is 25°C and the outdoor temperature is -8°C, the inside and outside surfaces of the glass are measured to be 21.4°C and 18.1°C. If the glass has an area of 3.06 m2 and a thickness of 6.23 mm, what is the rate of heat (in W) lost though the window [round your final answer to zero decimal places]? {kglass = 0.78 W/m∙K}
- -1 Heat capacity of ice: 2090 J kg-¹ °C-1 Heat capacity of water (liquid): 4186 J kg-¹ °C-1 Latent heat of fusion: 3.36×105 J kg-¹ -1 Latent heat of vaporization: 2.26×107 J kg -1 Give your answers to at least three significant figures. Your answers must be accurate to 1%. How much heat energy is required to raise the temperature of 625 g of ice from a temperature of -50 °C to a temperature of -27 °C? J Submit Answer How much heat energy is required to raise the temperature of 625 g of water from a temperature of 43 °C to a temperature of 87 °C? J Submit Answer How much heat energy is required to raise the temperature of 625 g of water (initially ice) from a temperature of -50 °C to a temperature of 87 °C? J Submit Answer How much heat energy is required to evaporate 625 g of water which is initially at a temperature of 43 °C? JThe exterior walls of a house have a total area of 194 m2 and are at 12.4°C and the surrounding air is at 7.4° C. Find the rate of convective cooling of the walls, assuming a convection coefficient of 2.9 W/(m2·°C). Since you're looking for the rate of cooling, your answer should be entered as positive.Due to a temperature difference AT, heat is conducted through an aluminum plate that is 0.0331 m thick. The plate is then replaced by a stainless steel plate that has the same temperature difference and cross-sectional area. How thick should the steel plate be, so that the same amount of heat per second is conducted through it? Thermal conductivities of steel and aluminum are 14 J/(s-m-C°) and 240 J/(s-m-C°), respectively. Number Units
- Please answer this, I need help.A wood slab with a thickness of 0.05 m is subjected to a heat flux of 40 W/m2. The left and right surface temperatures of the wood slab are kept at constant temperatures of 40°C and 20°C, respectively. What is the thermal conductivity of the wood slab?Anice chest at a beach party contains 12 cans of soda at 3.70°C. Each can of soda has a mass of 0.35 kg and a specific heat capacity of 3800 J/(kg C). Someone adds a 8.99-kg watermelon at 25.0°C to the chest. The specific heat capacity of watermelon is nearly the same as that of water. Ignore the specific heat capacity of the chest and determine the final temperature T of the soda and watermelon in degrees Celsius. Number Units Tube Initial Final