While a car is stopped at a traffic light in a storm, raindrops strike the roof of the car. the area of the roof is 5.0 m2. each raindrop has a mass of 3.7 ✕ 10−4 kg and speed of 2.5 m/s before impact and is at rest after the impact. if, on average at a given time, 150 raindrops strike each square meter, what is the impulse of the rain striking the car?

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?