If an earthquake wave having a wavelength of 13 km caused the ground to vibrate 10 times each minute, what is the speed of the wave? 1.2 km/s 2.2 km/s 220 m/s 22 m/s if the amplitude in a sound wave is doubled, by what factor does the intensity of the wave increase? 2 1 8 4(my choice)

#1

Wavelength = 13 km

it vibrates 10 times each minute

so the frequency is defined by the number of vibrations per second

now the speed of wave is defined as

so here velocity of wave is 2.2 km/s

#2

Intensity of wave is directly proportional to the square of its amplitude

so we can say

k = constant

so if amplitude is doubled then its intensity will be increased by its square

so intensity is 4 times

jupiter

explanation:

it is so massive and has such a strong gravitational pull its likely prevented the formation of a planet between itself and mars in the asteroid belt

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