Q. Why must a thermom be calibrated? You have a glass bulb thermom with no markings on it, and a second one marked in degrees Celsius. Describe how you would calibrate the unmarked thermom.
Q. A uniform disk turns at 1.9 around a frictionless spindle. A non rotating rod, of the similar mass as the disk and length equal to the disk's diam, is dropped onto the freely spinning disk. They after that both turn around the spindle with their centers superposed. What is the angular frequency in of the combination?