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- A lightning bolt is observed and the resultant thunderclap is heard 5 seconds afterwards. Assuming the speed of sound in air is 340 m/s, how far away was the lightning bolt? Your answer should be in units of m but you should only submit the number for your answer.P and S waves from an earthquake travel at different speeds, and thisdifference helps locate the earthquake “epicenter” (where the disturbancetook place). Assuming typical speeds of 8.5km/s and 5.5 km/s for P and Swaves, respectively, how far away did an earthquake occur if a particularseismic station detects the arrival of these two types of waves 1.5 minapart?Careless Doug is standing on the summit of Mount Whitney (elevation 14,505 ft) while his prudent friend Hal is back at their basecamp on the shore of Iceberg Lake (elevation 12,621 ft). According to Google Maps, the horizontal distance between them is 1997 ft. Suddenly, a storm blows up, and poor Doug is struck by lightning. How much time elapses between when Hal sees the strike and when he hears it? Use 330 m/s for the speed of sound in the cold Sierra air.
- A seismographic station receives S and P waves from an earthquake, separated in time by 16.2 s. Assume the waves have traveled over the same path at speeds of 4.50 km/s and 8.20 km/s. Find the distance from the seismograph to the focus of the quake.The speed of longitudinal waves in the earth's crust is 8.0 km/s and the speed of the transversal waves is 5.0 km/s. What is the distance from the epicenter to the seismological stations if the longitudinal waves have reached the seismograph 87 s before the transversal waves? (The solution is 1.2 × 10² km)A seismographic station receives S and P waves from an earthquake, separated in time by 15.0 s. Assume the waves have traveled over the same path at speeds of 4.50 km/s and 8.80 km/s. Find the distance from the seismograph to the focus of the quake. km
- An earthquake emits primary waves moving at 8.0 km/s and secondary waves moving at 5.0 km/s. How far from the epicentre of the earthquake is the seismic station if the two waves arrive at the station 2.0 min apart?In 2004 a massive 10-30m high tsunami was created in the eastern Indian Ocean by anearthquake in Sumatra resulting in the loss of hundreds of thousands of lives. The coast of Africa lies7000km to the west of Sumatra. Knowing that tsunami’s propagate at a speed v = √gH, how longdid it take for the tsunami to strike Africa?Sailors use the following function f to estimate the wave height h, in feet, from wind speed w, in miles per hour: h = f(w) = 0.02w2.045 Explain what the answer means in terms of wave height and wind speed Suppose a sailor observes that the wave height is about 11 feet. According to the formula, what would be the speed of the wind?
- If thunder is heard 12 s after a lightning flash is observed approximately how far away is the storm? Give your answer in kilometers and miles.Q: Seismographs measure the arrival times ofearthquakes with a precision of 0.100 s. To get the distanceto the epicenter of the quake, geologists compare the arrivaltimes of S- and P-waves, which travel at different speeds. IfS- and P-waves travel at 4.00 and 7.20 km/s, respectively,in the region considered, how precisely can the distance tothe source of the earthquake be determined? Attempted answer: If 'd' is the distance from the geologist monitoring station to the epicenter ('d' is the quantity they want to measure), the first wave (P-wave) arrives in (d km) / (7.20 km/s) = d/7.20 s. Similarly, the second wave (S-wave) arrives in d/4.00 s. Then the measured time difference between the arrival of the 2 wave ('td') is: td = (d/4.00 - d/7.20) s d = 9*(td) Since each arrival time has an uncertainty of 0.100, and td is the difference of the 2 arrival times, td has an uncertainty of 0.200. Since d = 9*(td), 'd' has an uncertainty of 1.8 km. Therefore, the precision in measuring the…A meteorologist for a TV station is using radar to determine the distance to a cloud. He notes that a time of 0.24 ms elapses between the sending and the return of a radar pulse. How far away is the cloud?