(a) zarah yang manakah ion positif?terangkan jawapan anda. (b) zarah yang manakah ion negatif? Terangkan jawapan anda.

(c) Zarah yang manakah adalah neutral? Terangkan jawapan anda.

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?

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.