Mon 24 March 2014

The so-called Doppler effect

Satellite tracked Malaysia plane in 'unprecedented' way writes:

In its further detective work, Inmarsat studied the so-called Doppler effect, the name for what makes the noise from an approaching vehicle sound different from one speeding away from a listener.

Right up there with the so-called gravity effect and so-called wind …

Sat 08 February 2014

How does water instantly freeze in a water bottle?

In our garage we have some bottled water. With the colder weather I've witnessed an interesting phenomenon. When I bring a water bottle into the house, it is entirely liquid, but as soon as I shake it, it fills with slush.

Apparently, it's a process called supercooling. The water temperature …