A ball is dropped from an unknown height and takes 4.5 seconds to fall to the ground. What height was it dropped from? How fast will it be going when it hits the ground?

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?

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

The three classes of rocks are sedimentary, metamorphic, and igneous. how are rocks classified into one of these three groups?