This PSSC film made in 1960 is one of the finest physics films ever made. All students should see it at some point in their studies. See the article '"Frames of Reference" revisited' by Alistair Steyn ...

When walking through an unfamiliar city, we might rely on different types of directions. Head east out of the train station, take a left at the stoplight, turn at the building with the mural. To move ...