Fish are hung on a spring scale to determine their mass (most shermen feel no obligation to report the mass truthfully). {a} what is the force constant (in mej of the spring in such a scale if it stretches 7.80 cm for a 11.0 kg load? ( | N/m (b) What is the mass {in kg} of a fish that stretches the spring 5.50 cm? kg [(2) How far apart (in mm) are the half-kilogram marks on the scale? a l mm