Nerve cells transmit electric signals through their long tubular axons. These signals propagate due to a sudden rush of Na ions, each with charge e, into the axon. Measurements have revealed that typically about 5.6 * 1011 Na ions enter each meter of the axon during a time of 10 ms. What is the current during this inflow of charge in a meter of axon

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Who was the first scientist to measure speed as distance over time?