Speedometer

What is the difference between speed and velocity?

The terms speed and velocity are often used interchangeably. This isn't correct, and I will explain why below.Speed is a scalar measurement of the rate...
nuclear weapon

How many countries have nuclear weapons?

Nine countries are known to have nuclear weapons. There are about 14,000 nuclear weapons in the world, a number that has been declining since...

Would detonating a nuclear bomb in a desert really turn its sand into glass?

Yes, detonating a nuclear bomb in a desert really would turn its sand into glass. Well, at least a portion of it. We know...
gas can

Does gasoline go bad?

Gasoline (gas), also called petrol in the U.K, degrades over time which can lead to problems ranging from engines having difficulty starting or not...
bird chirp

Can different bird species understand each other?

Birds communicate in various ways, but i'll be focusing only on audible communication in this post.Robert D. Magrath, a behavioral ecologist at the Australian...

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