dot physics

Really, the only difference is that this is a downward-curving path with the center of this circular curve below the slide instead of above. (Once again, the…

Let's consider an example with an imaginary planet. In this solar system, the planet completes one orbit around its sun in 8.6 solar days, instead of 365…

Superheroes do superhero things: They jump, punch stuff, run fast, and sometimes shoot beams out of their eyes. These activities require energy, just like…

But since this uses the total time of flight for the ball, it gives the total distance the ball traveled—to the wall and back. If you take that distance and…

Everyone has the same comment about Batman: He's cool because he's just a normal dude, but he's also a superhero. It’s true, he doesn't have superpowers.…

Finally, we have the crane itself. I left off some of the unimportant forces here—the most critical are the forces from the magnet and the cart pulling in…

That might seem like a large volume, but it's not. It's almost half of a liter, so that's half a bottle of soda.Moles and ParticlesThese moles aren’t the…

Since the velocity is defined as the time-rate of change of position, the slope of this plot should give the velocity. That puts this wave speed at 2.85 m/s,…

Suppose this parallel plate capacitor is connected to a 9-volt battery. A volt is a measure of the electric potential difference. In short, this is the…

Our planet also changes positions. In six months, the Earth will go from one side of the sun to the other. This is a change in distance of almost 300 million…