The bulk modulus of the Earth is 40 GPa and the shear modulus of the earth is 25 GPa. The P wave is arrived 5 min before the S wave. Calculate the distance of the earthquake. Here, density of the Earth is 5.51 g/cm. (a) 5040 km (b) 2100 km (c) 6300 km (d) 2280 km
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- A spring is hanging down from the ceiling, and an object of mass m is attached to the free end. The object is pulled down, thereby stretching the spring, and then released. The object oscillates up and down, and the time T required for one complete up-and-down oscillation is given by the equation T = 2л√/m/k, where k is known as the spring constant. What must be the dimension of k for this equation to be dimensionally correct? O [T] O [T]² O [M] O [M]/[T] O [T]/[M] O [M]/[T]² O [T]²/[M]Physicians use an EEG (electroencephalogram) to study electrical oscillations in the human brain. So-called Beta oscillations, whose enhancement has been linked to alcoholism, have a typical frequency of 15 Hz. What is the wave's velocity at 1.00 sec if its maximum amplitude is 0.500 cm? 2.25 cm/sec 2.25 cm/sec -2.25 cm/sec -2.25 cm/sec 47.0 cm/sec 47.0 cm/sec -47.0 cm/secConsider a group of waves propagating towards a levee that has a ⅓ shoreface slope. For which given combination of wave steepness, "e" , and shoreface slope, "s", will produce the highest two-percentile run-up distance (R2%). (Consider that significant wave height is the same for all cases.) A.) s = ⅓ and e= 1/20 B.) s = ⅓ and e = 1/10 C.) s = ¼ and e = 1/20 D.) s = ¼ and e = 1/10 This homework is time-sensitive, so haste is greatly appreciated :) thanks
- Convert the following to basic SI units or a combination of basic Sl units:The national seismological service is designing a training for new members in which they are asked to calculate the epicentral distance simulating an earthquake of magnitude 8.5 The information provided is as follows: surface waves generally have a frequency of 0.5 Hz and the intensity of the P wave in Mexico City was 2x106 J What is the power of a area of 483 m²? m³s" 4.83× 108 W 4.141 x 10³ W 9.66 × 108 W 9.66× 102 W1) 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).
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