Recent content by Zero-G

Hey, sorry if this is a stupid question but I'm getting really confused... If I am standing on the Earth and watch a spaceship moving past at say 0.8*c from left to right, I will observe the spaceship to contract in its direction of motion. If a person on the spaceship shines a torch also from...

If light could only travel at 50km/hr, then this is a maximum speed and hence nothing can travel faster than it. I am guessing that the effects of relativity would become much more noticeable and space travel would be impossible because the escape velocity of the Earth would exceed the speed of...

Has anyone ever wondered how life would be different if light could only travel at 50km/hr?

Everyone knows onions make you cry :cry: , but do they actually do any damage to your eyes? How can one stop their eyes from getting sore when cutting up these cruel vegetables?

Anyone looking for ideas for a maths investigation project might like to consider this, which I did when I was in year 8 and won at the national level. It's a problem taken from 'Enigma' in NewScientist (18 January 2003, page 49). "Joe's latest hobby is leatherwork. At the beginning of...

Was it Aristotle who said that more massive objects will fall faster than lighter objects? This leads me to wonder: why didn't he just experiment with this idea to see that he was wrong? :confused:

The speed of light in a vacuum is constant. When light passes through a more optically dense medium such as water or air, it travels slower. If you are traveling through a vacuum towards a light source such as a star, you will measure the speed of this light to be 299,792,458 metres per...