6. An Italian monk named Giovanni Battista Orsenigo was also a dentist. From 1868 to 1903 he extracted exactly 2,000,744 teeth, which on average amounts to about 156
teeth per day. Consider a group of protons equal to the total number of teeth. If this
group is divided in half, calculate the charge of each half. Also calculate the magnitude
of the electric force that would result if the two groups of charges are placed 1.0 km
apart.

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600