Recent content by pabilbado

  1. pabilbado

    I am looking for interesting physics/math or logic problems

    It can be done through integration, can't it?
  2. pabilbado

    I am looking for interesting physics/math or logic problems

    I think I solved your problem. If you rearrange this equation you should get that r=(something)xd, where r is the radious of the field and d the length of the rope, that should be the relationship between the rope and the radius of the field. I hope I am right. EDIT> Sorry there is a mistake on...
  3. pabilbado

    I don't know yet how to integrate this function....

    I forgot to post how I solved the problem. I did the taylor series and then I integrated term by term. I did it a long time ago, but i forgott to post it here.
  4. pabilbado

    I am looking for interesting physics/math or logic problems

    Well, the tittle is self-explanatory. If anyone has an interesting problem or puzzle. I will be grateful if you could post it.
  5. pabilbado

    Insights Why Do People Say That 1 and .999 Are Equal? - Comments

    I alread covered this in blog a while ago, though it's in spanish: https://preguntaspococientificas.wordpress.com
  6. pabilbado

    I don't know yet how to integrate this function....

    EDIT: thinking about it I believe I will be stuck with the same problem: integrating a function that has a trigonometric function inside a square root. Yeah I thought about it, but I had two different directions, but I wasn't sure if I could just use the arc length for the first equation, then...
  7. pabilbado

    I don't know yet how to integrate this function....

    Yeah, that's the easy way. What I want is to take into account the rotation of earth, while is moving around the sun. Because a point in the surface of the Earth does not travel a circular path around the sun but rather a really "curly" trajectory. So as a first approximation I have flattened...
  8. pabilbado

    I don't know yet how to integrate this function....

    No, is not. Two days ago it was my father's birthday (he is a nerdy engineer so he will like this kind of present) so I am trying to calculate how much kilometers he has traveled around the sun. And as an approximation I have made the Earth's orbit a straight line, and this is the result of a...
  9. pabilbado

    I don't know yet how to integrate this function....

    I was just wondering about the path an orbiting particle takes when it's center of circular motion also translates. So as to calculate the distance traveled I know I have to get a function that relates velocity with respect to time and integrate it, but I can't doit, I get stuck integrating. I...
  10. pabilbado

    What happens to matter when it enters a black hole?

    Actually "Time" tends to infinity, coordinate time tends to infinity. But there is a concept called proper time which is invariant no matter what coordinate system you are using which will tend to a value T as you approach the event horizon, and that will be the time the falling object will...
  11. pabilbado

    Can Light Really Have Mass According to Harvard-MIT Research?

    I don't know what you really mean, if you are talking about momentun certainly light has momentun.
  12. pabilbado

    What happens to matter when it enters a black hole?

    The normal presentation of these gravitational time dilation effects can lead one to a mistaken conclusion: If an external observer sees me falling inside a black hole my time would look like is decreasing asymptotically. It may seem like I would see the opposite effect, seeing the universe...
  13. pabilbado

    Calculate the distance travelled in a moving circumference?

    So, if I just change some things like: The velocity on the x-axis = and the velocity on the y-axis = (v = maximun velocity, w is the angular frequency. x = time and m = the velocity of the circumference.) So can I write that the total velocity = and integrate between the periods of time I...
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