A jet flying at an altitude of 8.50 km has a speed of Mach 2.00, where the speed of sound is v = 340.00 m/s. How long after the jet is directly overhead, will a stationary observer hear a sonic boom?
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A jet flying at an altitude of 8.50 km has a speed of Mach 2.00, where the speed of sound is v = 340.00 m/s. How long after the jet is directly overhead, will a stationary observer hear a sonic boom?
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- While attending a large fireworks event with music, you decide to stay 1 kilometer away because of the crowds. However you have a good view, and you can still hear the booms, as well as the music. Given a speed of sound on a warm moist summer night of 340 m/s, select those that apply. The music is out of phase with the fireworks and occurs about 3 seconds late. The booms are so loud they occur at the same time as the flash of fireworks explosion. The booms follow the flashes you see by about 3 seconds. The music has the wrong pitch with its frequency changed by the time it takes to reach you. The music is out of phase with the fireworks and occurs about 6 seconds early CAN BE MORE THAN ONE ANSWERDolphins of the open ocean are classified as Type II Odontocetes (toothed whales). These animals use ultrasonic "clicks" with a frequency of about 55 kHz to navigate and find prey. Suppose a dolphin sends out a series of clicks that are reflected back from the bottom of the ocean 90 m below. How much time elapses before the dolphin hears the echoes of the clicks? (The speed of sound in seawater is approximately 1530 m/s.) What is the wavelength of 55 kHz sound in the ocean?What frequency of sound is observed if the 444 Hz source is traveling away from a stationary observer at a speed of 30.2 m/s? (assume the speed of sound in air is 343 m/s)