A truck is driving north at 35 miles per hour and passes a car going south at 40 miles per hour. What is the speed of the car from the truck driver’s frame of reference?

Lets say that an object of a certain volume has a certin mass. what happens to its mass when you double its volume?

What are igneous intrusions and extrusions

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?