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Compute the increase in length of 757 m of copper wire when its temperature changes from 2°C to 370°C. For copper, a =1.7 x 10-5/°C.
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- The table below gives the results of measuring the electrical conductivity C of glass at temperature T degrees Fahrenheit. 86 148 166 188 202 210 0.004 0.018 0.029 0.051 0.073 0.090 Use regression to find the exponential function C=ae bT that will satisfy the given table. Find the value of Cif T = 197.1.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!)Approximately how long should it take 9.5 kg of ice at 0 °C to melt when it is placed in a carefully sealed Styrofoam ice chest of dimensions 25 cm × 35 cm x 55 cm whose walls are 1.1 cm thick? Assume that the conductivity of Styrofoam is double that of air and that the outside temperature is 35 °C. Express your answer using two significant figures. VE ΑΣΦ ? S
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