1. Explain, based on a scientific theory, why lightning travels through the air. Explain why it is scientific. Then write down a non-scientific explanation of the same phenomenon, and explain why it is non-scientific. Then write down a pseudoscientific explanation of the same phenomenon, and explain why it is pseudoscientific.

2. put down a question about the action potential of the human nervous system and a current source of 15.18 amperes. Then answer it.

3. An electrical circuit contains a capacitor of 105 picofarads and a resistor of 1518 ohms. If the capacitor is fully charged, and then the voltage is interrupted, in how much time will about 95% of its charge be transferred to the resistor? Show your calculations.