Astronauts can lose up to ~20% of their bone mineral density during their extended time in micro‐gravity. Draw the stress‐strain curve for both compact bone and cancellous bone for an astronaut in compression before the leave on their space journey and predict how this curve will change for this astronaut immediately after they return to Earth.

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?