Questions of the Week
What determines the size of a water wave?
What does a wave with a large amplitude carry?
A longer wavelength measure means what kind of frequency?
Sound waves travel fastest in what materials?
What is the Greek symbol for wavelength?
Scientist of the Week
I was born on December 14, 1546.
I was a Danish nobleman, astronomer, and writer.
I have been described as "the first competent mind in modern astronomy to feel ardently the passion for exact empirical facts".
On 29 December 1566, at the age of 20, I lost part of my nose in a sword duel with a fellow Danish nobleman.
I worked to combine what I saw as the geometrical benefits of the Copernican system with the philosophical benefits of the Ptolemaic system into my own model of the universe.
Daily Questions
What do you and I see, hear, and think with?
Why does helium from a balloon make your voice squeaky?
What do snakes use other than their eyes to detect prey?
What is the wave speed in meters per second of sound in dry air?
What happens to the speed of light as it goes through a prism?