8. what is the approximate time difference between the first p-wave and the first s-wave recorded at a seismic station located 8000 kilometers from an earthquake's epicenter?

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms