What are the possible units for a spring constant

Phase changes are chemical changes. true or false

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.