Recent content by Battlecruiser

I don't really understand this ability to deny something, but the reason that things are black is because they absorb all the light, so that there are no photons left to get reflected back. So black holes are black because their gravitation field just pulls all the photons within the hole. Light...

Your pull on the Earth is extremely negligible. If you (mass of 150 kg) and a friend (mass of 75 kg) both jumped off a cliff at different times, but someone else (presumably because you and your friend would be dead) timed how long it takes to reach the ground, you would reach the ground first...

This will be useful.

I should be sleeping now because it's 1:41 A.M., but I've been watching this video instead. I must say, it is pretty helpful and a good review. Thanks for posting this.

What do you know about the acceleration of the speeder? His velocity isn't changing. So what does that mean in terms of the accelerations?

I think your approach ignores the fact that velocity is changing (Because there is acceleration) and it may be ignoring any initial velocity the object has already attained in the previous seconds.

I find it is best to start off by listing all known variables. For example: V_{s} (Velocity of speeder)= 100 km/h V_{pi} (Velocity of Police Car initially)= 0 m/s A_{p} (Acceleration of Police Car)= 3.6 m/s^{}2 (EDIT: I don't know why subscripts are showing up as superscripts... oh well.)...

Use the formula d = v_0 t + (1/2) a t^2 You know that initial velocity is 0. You know the time and you know the acceleration.

I think for Part B, you can use one half of D which is .125 as the r value and the m value is just .250. I'm not sure what moment of inertia equation you would use though, so you need to check that, but I don't think it would be MR^{}2 because that's for cylindrical shells.

If you assume your four fingers (excluding the thumb), are sweeping an area in the plane made by the X and Y axis, the thumb will be point in the Z axis. So if there was a clock on your computer screen, the Z axis would be coming out of the screen and into the screen. Now, you have to determine...

You're right. Displacement won't be equal. The height of the egg from the ground is not it's displacement, but rather, 30 minus the distance it has traveled is it's height. You need to take the 30m into account. Then just set those equations equal to each other once you have taken the 30m into...

1. I don't think it will stop moving. Once it has been set into motion, and someone has given it some potential energy, the pendulum will continue to change from potential energy to kinetic energy and back to potential energy. The gravitational field is what creates the potential energy. So...

Yeah, I got this textbook. My uncle brought it, and it is pretty helpful. I still have another 7 or 8 more pages to write though and this stuff is confusing.

First of let me explain who I am: I am a ninth grader in a math honors class, and we have to pick a topic to research, and write a 15 page math research paper on it. I chose artificial intelligence. So now I need books, not textbooks, on artificial intelligence. If anyone has any...