17. Define the following: (2 points each) Ossilloscope: In-Phase: Out of Phase: Inertia: Elasticity:19. True or False (2 points each) Velocity on a hot humid day increases. The higher the altitude the slower the velocity Period is the distance covered by 1 cycle of vibration 100Hz pure tone has a longer wave length than a 1000Hz pure tone The cancelation of sound results from the interaction of 0 degrees and 360. 10kHz completes more cps than 10Hz. The adding of two pure tones of the same frequency, results in the same frequency but with more intensity