1. Surface waves from a mid-Atlantic storm arrive at the Irish coast with period 15 seconds. A day later the period of the waves arriving has dropped to 12.5 seconds. Roughly how far away did the storm occur? (Assume deep- water waves, i.e., w² = gk) OD D
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- 1. A wave has a length of 30.0 cm and a velocity of 2.5 cm/s. If it has a velocity of 3.70 cm/s when it enters a new medium, what is the wavelength?5. A sound wave travels at 343 m/s in air. If a note of frequency 500 Hz is played, how long is the wavelength? G E Click here Click here Click here Click here Click here1) If you want to know the speed of a long-wavelength wave (e.g. tsunami or tide), you can use the shallow-water wave velocity equation v=gd where g is acceleration due to gravity (~10 m/s2), d is water depth (in meters), and v = speed (in meters per second). a) Calculate the speed of a tsunami (in meters per second), assuming an average ocean depth of 4000m. b) Convert the speed of a tsunami from meters per second to meters per hour (note that 1 hr = 3600 seconds). c) Convert the speed of a tsunami from meters per hour to miles per hour (note that 1 mile = 1600m).
- 1. Storms in the South Pacific can create waves that travel all the way to the California coast, 12000 km away. How long does it take them to travel this distance if they travel at 21 m/s? t D V hrs17. Which of the following statements about Snell's law in the context of a seismic survey is incorrect? Snells law: sin 0,- V1 %D sin 02 V2 Here, 0, is the incidence angle and 02 is the transmission angle. a. Snell’s law shows the angular relationship between the incident and transmitted waves at the interface in terms of velocities b. The angle of reflection can be different from the angle of incidence c. When a seismic wave travels from a region of low velocity to high velocity, the wave is refracted away from the normal vector of the interface d. When 02-90 degree, a head wave develops due to critical refraction4. An ocean wave of wavelength 1.2 m is travelling at 3.5 m/s. What is the frequency? G E Click here Click here Click here Click here Click here
- 13.) Seismic waves are transverse waves that travel only on Earth's surface. a. true b. falseSuppose an ocean wave under fairly calm conditions has a height of 1/3 meter and carries a power of 500 watts for every meter along the length of the swell. These are typical values for a calm day at sea. How much more energy would be carried by the waves of a strong gale that are 10 meters high (33 feet!). A hurricane creates even more powerful waves with astounding energy. 27,000 times more energy 900 times more energy the same energy 30 times more energy3) P = pvo'smax A sin²(kx-ot). Assuming that dx/dt = v but that all other variables don't depend on t, find dP/dt.