A 30.0-cm-long spring is hanging vertically. When a 100.0-g object is attached to the bottom end of the spring, the spring is stretched to a new length of 34.5 cm. What is the spring constant in N/m?

Pre-Lab 11.d Homework Unanswered Due Today, 11:59 PM What is the period of the oscillation if the 200.0-g object is pulled down 5.0 cm from the spring-object equilibrium level? Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5E5 for 2.5 x 10) Type your numeric answer and submit Unanswered 2 attempts left Submit Pre-lab 11.e Homework Unanswered To experimentally determine the period of an oscillation described in step c or d above, why is it better to measure the time for multiple oscillations (e.g., 10 oscillations) instead of just one oscillation? How does a person's reaction time affect the uncertainty in the measurements?