1. A 4-kg skateboard moving at 8 m/s collides with another identical skateboard initially at rest. If the two skateboards stick together, what is their speed after the collision?

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

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 3.00 ms . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?

When a metal and an bond they do not share electrons