4. A circular copper ring at 20.0°C has a hole with an area of 9.980 cm².(a) What minimum temperature must it have so that it can be slipped onto a steel rod havinga cross-sectional area of 10.000 cm²?(b) Suppose the ring and the rod are heated simultaneously. What minimum change in tem-perature of both will allow the ring to be slipped onto the end of the rod?Copper coefficient of linear expansion: 17×10-(°C)-1Steel coefficient of linear expansion: 11x10-°(°C)-i5. Your 300 mL cup of coffee is too hot to drink when served at 90 °C. What is the mass of anice cube, taken from -20 °C freezer that will cool your coffee to a pleasant 60 °C? Specific heatcapacity of ice = 2090 J/kgK.Latent heat for fusion = 330000 J/kq

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Answered: 4. A circular copper ring at 20.0°C has…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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a) A house walls that are 11 cm thick and have an average thermal conductivity four times that of glass wool. Assume there are no windows or doors. The walls’ surface area is 850000 cm2 and their inside surface is at 18°C, while their outside surface is at 7°C. (Thermal conductivity of glass wool is 0.042 W/m°C) (i) Calculate the rate of heat conduction through house walls? Answer for part 1 (ii) How many 150W room heaters would be needed to balance the heat transfer due to conduction? (approximate number) Answer for part 2 b) A spherical infrared heater of radius 5.1 cm has an emissivity of 0.8. What temperature must it run at if the required power is 0.56 kW? Neglect the temperature of the environment. (Stefan's constant = 5.67*10-8 Wm-2K-4) The temperature of the heater in Celsius =
234 °C steam flows in a pipe which features are given below. Inner and outer diameters of pipe are 300 mm and 320 mm. Coefficient of heat transmission is 40 W/mK. It's external ambient is air and it's temperature is 20 °C. Take the temperature of the pipe's external surface 180 °C. It is known that the internal temp convection coefficient is 600 W/ m2K. The pipe's length is 500 meter. You need to add the radiation in the calculation. The rate of the radiation emissivity is 0.85. You can take the environmental surface temp directly.Calculate the heat loss of pipe. Note) use the relation below which is the indoor horizontal pipe equation to external temp convection coefficiency. Equations to be used are attached!
36. GO A copper pipe with an outer radius of 0.013 m runs from an outdoor wall faucet into the interior of a house. The temperature of the faucet is 4.0 °C, and the temperature of the pipe, at 3.0 m from the faucet, is 25 °C. In fifteen minutes, the pipe conducts a total of 270 J of heat to the outdoor faucet from the house interior. Find the inner radius of the pipe. Ignore any water inside the pipe.
A. find the increase in length of 12 m of copper wire wh it's temperature increases from 4°C to 34°C the linear coefficient of expansion for copper is 1.7x10^-5 /°C
35. ssm Suppose that the steel gas tank in your car is completely filled when the temperature is 17 °C. How many gallons will spill out of the twenty-gallon tank when the temperature rises to 35 °C?
Q2/ air at 25 °C and 1 atm flows over flat plate at 20 m/s. the plate is 75 mm long and it is maintained at 55 °C. Assume unit depth in z-direction, find the heat transfer rate from the plate. p31.128 kg/m^3 ,k=0.02723 W/(m.K) p=1.906x10^(-5) * kg/(m.s) ,cp=1.007 kJ/(kg.°C) إضاقة علف
3. A 3.2 m length of copper pipe extends directly from a hot-water heater in a basement to a faucet on the first floor of a house. If the faucet isn't fixed in place, how much will it rise when the pipe is heated from 20.0° C to 85.9° C. The coefficient of linear expansion for copper is 1.6*10-5 K−1.
3. (a) The rate of heat transfer through a wood shingles roof of 4.50 m length, 3.90 m width and in 8.50 cm thickness is 126.65 W. The temperature of outside and inside-surface is 33.5 °C and 26.5 °C, respectively. (i) Determine thermal resistance, R of the wood shingles roof. (ii) Calculate the thermal conductivity. Give your answer in 3 decimal places. (iii) If a glass wool with higher thermal resistance is used to replace the wood shingles roof, determine which material tend to have lesser rate of heat transfer.
A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 x 10-4°C-1). At room temperature (20.0°C), the frames have circular lens holes 2.19 cm in radius. To what temperature must the frames be heated if lenses 2.2 cm in radius are to be inserted into them? °C Need Help? Read It
1. If two thermometers, one reading oc and the other K, are inserted in the same system, under what circumstance will they both have the same numerical reading? What will be the system's temperature when the absolute thermometer reads twice the numerical reading of the Celsius thermometer?
Older railroad tracks in the U.S. are made of Part A 12-m-long pieces of steel. When the tracks are laid, gaps are left between the sections to prevent buckling when the steel thermally expands. If a track is laid at 16° C, how large should the gaps be if the track is not to buckle when the temperature is as high as 50° C? The coefficient of linear expansion of soft steel is 1.1 × 10-5 °C-1. Express your answer with the appropriate units. HẢ .... Value %3D Submit Previous Answers Request Answer
1. An expensive vacuum system can achieve a pressure as low as 1.83 ✕ 10−7 N/m2 at 26°C. How many atoms are there in a cubic centimeter at this pressure and temperature? 2. The number of kilocalories in food is determined by calorimetry techniques in which the food is burned and the amount of heat transfer is measured. How many kilocalories per gram are there in a 4.80 g peanut if the energy from burning it is transferred to 0.600 kg of water held in a 0.130 kg aluminum cup, causing a 44.0°C temperature increase?

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