Why does evaporation happen? How do clouds turn into a waterspout? Why doesn't thermal stratification occur in the atmosphere? Why would a descending air mass be drier? Why does the atmospheric pressure decrease with altitude? How does a funnel cloud form?
Why does the charge on the capacitor eventually stop changing? a. Why must the thermal equilibrium generation and recombination rates for electrons and holes all be equal? b. If excess carriers in a semiconductor are being generated, why d...
Why does nuclear fusion in the sun only occur near the center? What is the difference between converging and diverging waves? What would happen if you drilled a hole through the center of the earth and dropped something down it? Why doesn't Mars have active volcanoes...