A 12-cm-long spring is attached to the ceiling. When a 1. 6 kg mass is hung from it, the spring stretches to a length of 17 cm You may want to review (Pages 219-221) Part A What is the spring constant k? Express your answer to two significant figures and include the appropriate units. ? CHAO Value Units k = Submit Request Answer Part B How long is the spring when a 3. 0 kg mass is suspended from it? Express your answer to two significant figures and include the appropriate units. - Value Units