Time left 1:17:03 Question 14 A 300 g mass is attached to the end of a spring that is vertically suspended from a ceiling. The mass is pulled down then released and the system begins to Not yet oscillate. What is the period of oscillation if the spring's constant is 13.8 N/m? Express your answer to three significant digits in the form a.bc x 10-1s. answered Marked out of The values of a, b and c are: 1.00 Flag question Record the three values without spaces or punctuation) Question 15 A wave is incident on a barrier as shown in the diagram below. Not yet answered Marked out of 1.00 Flag 27.0 question 93.0 0 What is the angle of reflection (0) on the second barrier relative to the normal? Be sure to respond to the correct number of significant figures Alout nonn O N