Question 29 1 pts The gure below shows displacementtime graphs for two identical oscillators. What is the estimated phase difference between the two oscillations? Around 90 degrees. 1'") Around 180 degrees. '7' About 68 degrees. '3! Around 103 degrees. '2: Around 40 degrees. Question 30 1 pts The gure below shows the trace on an oscilloscope screen when sound waves are detected by a microphone. The timebase is set at 5 ms per division . Determine the frequency of the sound waves. Give your answer to 0 decimal places