Which diagram below best represents the magnetic field near a bar magnet?

Which articulations allow for greatest range of motion?

If a balloon is taken outside on a very cold day, what will occur?

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?