Q1. What is the wavelength of the waves emitted by source? What is the difference in frequency between directly radiated waves and the waves reflected from a whale travelling straight toward the ship at 4.99? Suppose that the ship is at rest in the water.
Q2. At one point in a pipeline, water's speed is 3.89 m/s and the gauge pressure is 4.00×10^4 Pa. Find out the gauge pressure at a second point in the line 14.0 m lower than the first if the pipe diameter at the second point is twice that at the first.