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- You are looking to purchase a small piece of land in Hong Kong. The price is "only" $60,000 per square meter! The land title says the dimensions are 35 m x 40 m. By how much would the total price change (in dollars) if you measured the parcel with a steel tape measure on a day when the temperature was 19°C above normal? (Include the sign of the value in your answer.)arrow_forwardA meter stick is made out of aluminum. The scale is accurate at 40°C. Suppose an intrepid student living in Alaska takes the meter stick outside on a very cold winter day to measure the length of a concrete paving stone with dimensions of 10 inches by 10 inches at 40°C. What length will the student measure, if the outside temperature is −46°C? (Give your answer in cm at −46°C. Round your answer to at least two decimal places.)arrow_forwardYou are working for Telkom in Upington and they ask you to measure the physical distance between two telephone poles with a steel tape on a day when the temperature is almost 45 degrees Celsius. You measure a distance of exactly 50m on this day with the steel measuring tape (α=1.2x10-5/K). You were then asked to verify your data (i.e. the 50 m distance) a month later when the temperature was now only 5 degrees Celsius using the same steel tape. a) Why do you think the steel tape will give a controversial answer in the cold weather?b) Explain (using words and a calculation) whether you expect to find a distance of more than 50 m or less than 50 m between the 2 poles at 5 degrees celsius.arrow_forward
- A 1100 cm X 1440 cm house is built on a 12.8 cm thick concrete slab of thermal conductivity 0.66 W/m.K.. If the ground temperature of the slab is 6.1°C while the interior of the house is 25.5°C. ((a*1)+ (b*1.5)+(c*2.5) = Calculate the following: a) The temperature difference in kelvin b) The temperature gradient (AT/Ax) in kelvin/metre c) The heat loss rate through the concrete slab in kilowattarrow_forwarda) What is the percentage increase in temperature between 0°C and 26°C when the temperatures are measured in Kelvin? What is the difference between these two temperatures when measured in Kelvin? The outlet of a rocket engine has a cylindrical shape. Its diameter is 2.5m when constructed in the factory at 18°C. Given a = 6 x 10-6K-1 for the alloy used, what will its diameter be (in metres) at its operating temperature of 600°C ? d) What will the cross-sectional area of the outlet be (in m²) at this temperature?arrow_forwardA 900 g copper rod at 20 degrees celcius has a length of 1.0000 m. The thermal expansion coefficient of copper is 17 x 10^-6 degrees celcius -1. The specific heat capacity is 0.385 kJ/kg degrees celcius. Question A: The copper is heated to 400 degrees celcius. What is the new length? Give the answer in meters and with 4 digits of precision after the decimal. Question B: The hot copper is then quenched by dunking the entire rod in a bucket with 10 kg of water at 20 degrees celcius. The specific heat capaciy of water is 4.18 kJ/kg degrees celcius. If none of the water turns to steam what is the equilibrium temp of the copper rod and water? Please give the answer in degrees celcius Question C: You measure the equilbrium temp and find that it is 24 degrees celcius. If the latent heat of vaporization of water is 2,260 kJ/kg, what mass of water turned to steam? Answer in gramsarrow_forward
- An aluminum wire is wrapped in rubber insulation. Both are subject to thermal expansion, with the following coefficients of linear expansion: alphaa=24· 10−6 1/C and alphar=8· 10−5 1/C . If the wire and insulation are the same length of 1.85m at a temperature of20.00°C, what is the difference in length (in MILLIMETERS) between the copper wire and the rubber insulation when heated up to a temperature of 189.00°C? Express a magnitude only (no negatives!). ______mm (MILLIMETERS!)arrow_forwardA cylinder of gas at room temperature (20°C) has a pressure p1. To what temperature in degrees Celsius would the temperature have to be increased for the pressure to be 1.2p1?arrow_forwardA 600 cm X 1760 cm house is built on a 13.2 cm thick concrete slab of thermal conductivity 0.66 W/m.K.. If the ground temperature of the slab is 6.7°C while the interior of the house is 25.5°C. (1+1.5+2.5 = 5marks) Calculate the following: a) The temperature difference in kelvin b) The temperature gradient (AT/Ax) in kelvin/metre c) The heat loss rate through the given area of concrete slab in kilowattarrow_forward
- A window has dimensions of 1.7 m by 2.3 m and is made of glass 4 mm thick. On a winter day, the outside temperature is 23° C while the inside temperature is a comfortable at 18.5° C. (k of glass =0.175W/m.K) . Calculate the following: a) the area of the window in square metres b) the temperature gradient (ΔT/Δx)in kelvin/metre c) the rate of heat lost through the window by conduction in watts/metre.kelvinarrow_forwardYou are working as a land surveyor in Upington and decided to BUY a plot of land for yourself. You now measure the physical distance between two outer points on the plot with a steel tape on a day when the temperature is almost 45 degrees Celsius. You measure a distance of exactly 1000 m on this day with the steel measuring tape(α=1.2x10-5/K) . You now decided to verify your data (i.e. the 1000 m distance) a month later when the temperature was now only 5 degrees Celsius using the same steel tape.a) Why do you think the steel tape will give a controversial answer in the cold weather?b) Explain (using words and a calculation) whether you expect to find a distance of more than 1000 m or less than 1000 m between the 2 poles at 5 degrees celsius.arrow_forwardSuppose that at room temperature, a certain aluminum bar is 1.0000 m long. The bar gets longer when its temperature is raised. The length l of the bar obeys the following relation: 1.0000 + 2.4 x 10-³T, where T is the number of degrees Celsius above room temperature. What is the change of the bar's length if the temperature is raised to 18.3 °C above room temperature? Express your answer in meters to two significant figures. Πν ΑΣφ ? Al = marrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning