Archive for August 2018
A black hole has a boundary, known as the event horizon. This is the point where the escape velocity is more than the speed of light. The gravity is just strong enough to prevent even light from...
Astronomers face an embarrassing conundrum:
They don’t know what 95% of the universe is made of. Atoms, which form everything we see around us, only account for a measly 5%. Over the past 80 years it...
What is friction?
The resistance that one surface or object encounters when moving over another.a lubrication system which reduces friction’ It's or...
