Which will ensure laboratory safety during the experiment? Check all that apply. using beaker tongs to handle the hot beaker

reading the thermometer accurately

checking the beaker for chips prior to heating on the hot plate

using a beaker instead of an Erlenmeyer flask

turning off the hot plate after use

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?