Part A A 5.00-m-diameter garden pond is 0.400 m deep. Solar energy is incident on the pond at an average rate of 400 W/m If the water absorbs all the solar energy and does not exchange energy with its surroundings, how many hours will it take to warm from 16.0°C to 28.0°C ? hours Submit Reguest Answer
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- 3 of 4 A stainless-steel-bottomed kettle, its bottom 25 cm in diameter and 1.6 mm thick, sits on a burner. The kettle holds boiling water, and energy flows into the water from the kettle bottom at 800 W. Review I Constants I Periodic Tabl Part A What is the temperature of the bottom surface of the kettle? Thermal conductivity of stainless steel is 14 W/(m K). Express your answer using four significant figures. VO AEO ? T = 102.65 °C Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Review your calculations and make sure you round to 4 significant figures in the last step. Ne Provide FeedbackFor related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Expansion of mercury. Part A An underground tank with a capacity of 1850 L (1.85 m³ ) is completely filled with ethanol that has an initial temperature of 19.3°C. After the ethanol has cooled off to the temperature of the tank and ground, which is 10.1° C, how much air space will there be above the ethanol in the tank? (Assume the coefficient of volume expansion for ethanol is 110 x 10¬º (K)-' and that the volume of the tank doesn't change appreciably.) Express your answer in liters. Πν ΑΣφ L Vair Submit Request AnswerA pot with a steel bottom 8.50 mm thick rests on a hot stove. The area of the bottom of the pot is 0.200 m². The water inside the pot is at 100.0°C, and 0.370 kg are evaporated every 3.00 m. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Conduction through two bars in contact. Part A Find the temperature of the lower surface of the pot, which is in contact with the stove. Express your answer in degrees. 17 ΑΣΦ T= Submit Provide Feedback Request Answer ? °C
- Electronics and inhabitants of the International Space Station generate a significant amount of thermal energy that the station must get rid of. The only way that the station can exhaust thermal energy is by radiation, which it does using thin, 1.8-m-by-3.6-m panels that have a working temperature of about 6 °C and an emissivity of 0.85. Part A How much power is radiated from each panel? Assume that the panels are in the shade so that the absorbed radiation will be negligible. The temperature of deep space, which the panels face, is close to 0 K. Hint: Don't forget that the panels have two sides! Express your answer with the appropriate units. ► View Available Hint(s) P = Submit μA Value Previous Answers W .... ?An insulated beaker with negligible mass contains liquid water with a mass of 0.245 kg and a temperature of 66.4 °C. Part A How much ice at a temperature of -17.8 °C must be dropped into the water so that the final temperature of the system will be 34.0°C? Take the specific heat of liquid water to be 4190 J/kg K, the specific heat of ice to be 2100 J/kg-K, and the heat of fusion for water to be 3.34x105 J/kg. View Available Hint(s) mice = [ΨΕΙ ΑΣΦ 5 kgA container holds 2.3 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 8.7x10-3 kg bullet with a speed of 870 m/s. What is the Kelvin temperature of the gas? Number i Units
- When a cooked chicken breast is first removed from an oven, it has a surface temperature of 180 C. By the time the chicken is served at the table it has cooled to 120 C. What is the ratio of energy flux density emitted from the surface of the chicken when it has cooled to that when it was hot? Group of answer choices A. depends on mass of the chicken B. 0.20 C. 0.57 D. 0.67 E. depends on surface area of the chickenA 40-cm-long icicle hangs from the eave of a house on a day when the temperature is -2.0°C. T Part A By how many millimeters does the icicle shrink if a bitterly cold wind drops the temperature to -20 °C? Express your answer with the appropriate units. AL= Submit xa μA Value 77 X.10n Units Previous Answers Request Answer ?A physicist uses a cylindrical metal can 0.350 m high and 0.090 m in diameter to store liquid helium at 4.22 K; at that temperature the heat of vaporization of helium is 2.09 x 104 J/kg. Completely surrounding the metal can are walls maintained at the temperature of liquid nitrogen, 77.3 K, with vacuum between the can and the surrounding walls. Part A How much helium is lost per hour? The emissivity of the metal can is 0.200. The only heat transfer between the metal can and the surrounding walls is by radiation. Express your answer in gram per hour. Am At Submit ΠΕ ΑΣΦΑΦ Request Answer PZ ? Review | Constants g/h
- A cube 19 cm on each side contains 4.0 g of helium at 20*C. 1000 J of heat energy are transferred to this gas. A. What is the final pressure if the process is at constant volume? B. What is the final volume if the process is at constant pressure?Double-glazed windows are usually made of two glass panes with a thin layer of air sealed between the panes. a. Why do these windows reduce heat loss to a much greater extent than occurs if the double glazing is replaced by a thicker glass instead? b. Why does the insulating effect of the double glazing decrease if the two glass panes are too far apart? Explain.The basal metabolic rate is the rate at which energy is produced in the body when a person is at rest. A 68 kg (150 lb) person of height 1.83 m (6.0 ft) would have a body surface area of approximately 1.9 m². Part A What is the net amount of heat this person could radiate per second into a room at 19.0° C (about 66.2°F) if his skin's surface temperature is 31.0° C? (At such temperatures, nearly all the heat is infrared radiation, for which the body's emissivity is 1.0, regardless of the amount of pigment.) Express your answer in watts. ΑΣφ ? Hnet W %D Submit Request Answer Part B Complete previous part(s)