主播大秀

Professor Heinz Wolff presents the problem of multiplying bacteria. If a single bacterium was placed in a test tube and split in two each minute, it would take one hour to fill a test tube. So how long would it take if:

a) he had started with two bacteria in the tube?
b) the initial bacterium had been half the size?

The problem is introduced, with a short pause to allow students to have a go at it, before the solutions are presented.