Snoopy is trying to earn a new Physics badge so he devised an experiment to determine the thermal conductivity of a bar made from a new metal alloy disguised as a stick, made by yours truly, The Metallurgist, One end of the bar is maintained at 20.0 degC by Snoopy's paw. Snoopy reasoned the other end will be at 75.0 degC when the marshmellow begins to char. The bar has a diameter of 1.20 cm and a length of 44.7 cm. If the rate of heat transfer through the bar is 7.00 W, what is the thermal conductivity (k) of this new bar