Sediments form from the process of

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Aneuron is stimulated with an electric pulse. the action potential is detected at a point 3.70 cm down the axon 0.0052 s later.when the action potential is detected 7.20 cm from the point of stimulation, the time required is 0.0063 s. what is the speed of the electric pulse along the axon? (why are two measurements needed instead of only one? )

How do you date a sample of rock that you suspect as being one of the earliest on earth

The response is the basis for vaccination. primary secondary tertiary none of the above