What is different between an ionic bond and a covalent bond?

What is a good example of instantaneous speed

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

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?