ʜᴇʟᴏᴏᴏ.ɪs ᴀɴʏᴏɴᴇ ᴏɴʟɪɴᴇ

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? )

Ineed the definitions of all of these words nasap i will give 1o points to whoever awnsers

What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen