All reactions require activation energy. a. trueb. false

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?

Identify some abiotic characteristics of the tundra biome.

Why does the liquid rise up through the dip tube when the valve is open