QUESTION 1 A hydrometer is a simple instrument used to measure the specific gravity of liquids. It has two connected parts: a glass bulb (weighted with a piece of metal) at the bottom and a cylindrical glass stem (with internal scale marks) at the top. When placed in a liquid, the hydrometer floats upright with some fraction of the stem extending above the liquid surface. a. Draw the appropriate force balance diagram for when the hydrometer is completely stationary in the fluid. b. When a hydrometer (with bulb volume of 40mL, bulb mass of 50g, cylindrical stem mass of 15g, cylindrical stem diameter of 8mm, and total cylindrical stem length of 24cm ) is placed in an unknown liquid, it floats at a particular position where the cylindrical stem extends 8.5cm above the liquid surface - calculate the specific gravity of this unknown liquid. c. A colleague asks you to borrow the same hydrometer from part b to measure the specific gravity of another unknown liquid that is believed to be approximately 1.1. Give a brief explanation of why it is or is not a good idea to let your colleague use it