1. Enumerate some common ways of transferring energy from one point to another. 2. What is meant by a transverse wave? Can transverse wave be propagated through a gas? 3. What is meant by a longitudinal wave? Give an example. 4. Give the principal characteristics of a wave. 5. What are needed to produce mechanical waves? Problems Set A 1. Ocean waves travel with a velocity of 50 meters per second. What is their frequency if their wavelength is 100 meters? 2. The distance between crests of an ocean wave is 50 meters. If 5 crests pass through a given point per second, what is the velocity of the wave? 3. The distance between troughs in an ocean wave is 40 meters. If the velocity of the wave is 140 meters per second, what is the period? 4. A wave ks observed to have a period of 2 seconds. How many crests pass through a given point per minute? 5. If 50 waves pass through a given point per minute, what is the period of the wave? 6. The velocity of the wave is 500 meters per minute. Find the wavelength if the period is 10 seconds