An action potential propagates at 64 m/s down an axon that is 30cm long. How much energy is transmitted down the axon if the action potential has a maximum value of 75mV and the resistance is 20,000Ω.

University Physics Volume 2
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Chapter10: Direct-current Circuits
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Problem 23P: (a) What is the internal resistance of a voltage source if its terminal potential drops by 2.00 V...
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a. An action potential propagates at 64 m/s down an axon that is 30cm long. How much energy is transmitted down the axon if the action potential has a maximum value of 75mV and the resistance is 20,000Ω.

b. A 12V battery supplies 0.7mA of current for 4.8hours. How much charge has been transferred?

c. The filament in the 100W light bulb has a resistance of 144Ω and is tungsten. It has a diameter of 0.03mm and has a resistivity of 5x10-7Ωm. How long should the filament be?

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