What is the temperature (in °C) on the right side of the wall shown in the figure below?

Inside the wall of a house, an L-shaped section of hot-water pipe consists of three parts: a straight, horizontal plece (figure below). A stud and a second-story floorboard hold the ends of this section of copper pipe stationary. Find the magnitude and direction of the displacement of the pipe elbow when the water flow is turned on, raising the temperature of the pipe from 18.0°C to 47.9°C. (Assume a coordinate system with it's origin at the elbow, the +x-axis to the right in line with the horizontal pipe and the +y-axis going upward.) magnitude mm direction • (clockwise from the +x-axis)

During a winter time in the past, Chicago temperature was -25°F.  What are corresponding  values on the Celsius and Kelvin scales?   detailed solution with all the explanations