• You have a mechanical fish scale that is made with a spring that compresses when weight is added to a hook attached below the scale. Unfortunately, the calibrations have completely worn off the scale. However, you have one known mass of 500.0 g that compresses the spring 2.0 cm. a. What is the spring constant for the spring? b. If a fish compresses the spring 4.5 cm, what is the mass of the fish?