Recent content by witze

Light fron the sun takes about 8 minutes to reach the Earth, not 4 minutes. I'd think you'd see the sun first, then the house lighting up; when you see the sun itself, light takes a straight (assuming no atmosphere) path from the sun to your eyes, when you see the house, light goes from the sun...

When Worlds Collide?!

The above explanation is dubious at best, and totally incorrect at worst.

Well, the vertical component of B was given in the problem, so I don't think you need to do the cross product. You're probably just having problems with unit converstions.

Nenad is right, the observers do not agree, but they are both correct. When an observer is accelerating relative to the Earth, he sees the Earth gaining an incredible amount of kinetic energy. However, he is not in an intertial frame of reference during that time. He does not actually have to do...

T^2/a^3=const for all planets orbiting the same massive object.

You're correct, but use standard written English next time. A cyclist is a single person, therefore you wouldn't refer to him as "they."

Kepler's Third Law!

I didn't bother going through your work, but I got the same answer, 3010.4 N. So I assume it's correct. Also, the distances in your problem were given to 2 significant digits, so realistically the answer is correct to only 2 sig dig.

I think I've actually had more problems with Firefox (and Opera) than IE, especially after adding a bunch of extensions. I still don't like IE though.

That's just absolute nonsense. I'm not even sure where to start... Do you want to spin the hydrogen by itself, without a container?!

I hate spiders, worms... Also when certain people look at me...

What is up with this myth that you have to be 18? I believe the legal age of consent in Massachusetts and many other states is, like, 16

Um, death maybe... Also, being buried alive, burned in a fire, mutilated, stuff like that...