This is a series of questions about the effect on the period of a spring-mass oscillator when you change the mass, the stiffness, or the amplitude. Collapse question part Part 1 Incorrect answer. Your answer is incorrect. Try again. (a) For a spring-mass oscillator, if you double the mass but keep the stiffness the same, by what numerical factor does the period change? That is, if the original period was and the new period is , what is ? It is useful to write out the expression for the period and ask yourself what would happen if you doubled the mass.