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Part A What do your measurements give for the value of the thermal conductivity of the unknown metal? Use kcu = 385 W/( mK). A copper bar is welded end to end to a bar of an unknown metal. The two bars have the same lengths and cross-sectional areas. The free end of the copper bar is maintained at a temperature Tu that can be varied. The free end of the unknown metal is kept at 0.0°C. To measure the thermal conductivity of the unknown metal, you measure the temperature T at the junction between the two bars for several values of Th. You plot your data as T versus Tu both in kelvins, and find that your data are well fit by a straight line that has slope 0.640. Express your answer in watts per mol-kelvin. 0 VO AO ? k= W/(mK) Submit Request Answer
Part A A Foucault pendulum consists of a brass sphere with a diameter of 38.0 cm suspended from a steel cable 10.5 m long (both measurements made at 20.0°C). Due to a design oversight, the swinging sphere clears the floor by a distance of only 3.00 mm when the temperature is 20.0°C. At what temperature will the sphere begin to brush the floor? Express your answer in degrees. ΤΕΙ ΑΣφ DU ? T = °C Submit Request Answer