earth

  1. G

    How Angular Velocity of Earth is 2Ï€/T?

    moment of inertia of the earth; I = \large \frac {2}{5} \normalsize MR^{2} Angular Velocity of Earth ; ω = \large \frac {2π}{T} Here Earth is considered as solid sphere. I didn't understand how Angular Velocity of Earth is \large \frac {2π}{T}?
  2. G

    How Earth maintain its same angular momentum even after sun disappears?

    How Earth maintain its same angular momentum even after sun disappears ?
  3. G

    After it lands on Earth, the distance the space shuttle travels is given by

    Have gotten help figuring these out, but unsure how to set up the last one. Thanks for any help or direction The runway at Edwards Air Force base is 15,000 feet long. What is the maximum velocity the shuttle can have at touchdown and still stop on the runway?
  4. Y

    Around the earth in the equator we attach a rope

    Around the earth in the equator we attach a rope (we treat the earth as a geometric ball). We add to the scope of the rope 1 meter. The length of the rope that been created is now equals to the scope of the earth + 1 meter. At some point, we pull the rope out. The rope attached the earth along...
  5. L

    Calculate area of a triangle, taking into account the earth curvature

    Calculate area of a triangle, taking into account the earth curvature Hello everyone, I'm trying to work out the area of a 2D triangle from where I stand on earth to a plane in the sky. I can do this however I'm trying to take into account the earths curvature.. And then add that to the...
  6. G

    What is the scientific reason for the inclination of earth's rotation axis?

    This titled position of the earths axis is known as inclination of the earths axis. The earth's rotation axis makes an angle of about 66.5 degrees with the plane of its orbit around the sun, or about 23.5 degrees from the perpendicular to the ecliptic plane what is the scientific reason for...
  7. B

    Effects of Gravity Falling Through Earth's Centre

    I drop a mass into a tunnel bored through the earth's centre and out to the opposite side. Assuming no air resistance, constant density, earth diameter 12,742,000m what velocity is the mass travelling at as it passes the centre? I assume this is the max velocity? Is the reduction in...
  8. G

    Which will return to earth after completion of mission?

    Which will return to earth after completion of mission: Space-Craft, Rocket & Space-Flight?
  9. happy21

    How much earth's surface is visible?

    Hello, Suppose that the earth is a sphere of radius 6400 kms. How can we calculate the height from the earth's surface from where exactly a fourth of the earth's surface is visible? Thanks.
  10. R

    You are standing somewhere on the earth...

    Hi You are standing somewhere on the earth and go 10 km south then go 10 km east then go 10 km north and you get back to the start. Where is the start? There should be 2 solutions, one of them is the north pole(?). Can someone explain this to me? I just can't imagine it. And what is the other...
  11. N

    trigonometry in earth

    Can someone help me? Suppose the earth to be a real sphere with the radius R. The arc distance from HK (N23) to the North pole is: a)2.2R b)1.2R c)0.9R How to solve it? I really need the work ASAP if it does not burden you.
  12. K

    Probability (How on earth do i do this?!)

    A standard pack of 52 cards of 4 suites, each with 13 denominations is well shuffled and dealt out to 4 players N, S, E and W who each receive 13 cards. If N and S have exactly 10 cards of a specified suit between them, show that the probability that the three remaining cards of the suite in one...
  13. R

    A body is released from a great fall freely towards earth an

    Hi all Can explain to me more about that this question because I don't understand fully A body is released from a great fall freely towards earth another body is released from the same height exactly one second later . Find the separation between the bodies after two second of the release of...
  14. M

    what the viscosity of planet earth as a whole

    what the viscosity of planet earth as a whole
  15. D

    Why on earth does this limit equal 1?

    I just ran across a strange limit that I've never heard of. This isn't a homework problem, but apparently a step toward a solution of one: $lim_{x\rightarrow\infty}(e^{x}sin(e^{-x}))=1$ Why does this limit equal 1? I graphed it, and sure enough, it's true, but I can't even begin to fathom how...
  16. T

    can we go through the center of the Earth

    Hello, i need help on this question, i have been thinking about it assume there is a hole through the center of the earth , and oxygen is exist so we can breath , if we drop the ball into the hold, is it possible for ball go through the center of the earth to other side of the hole ? so what i...
  17. V

    Earth math

    Thank you much! Now, I have another question... It is about Earth Math, and I need the answer REALLY soon, for I have a test this Friday! 1. How many square miles do all three of the Earth's largest oceans cover? And~ 2. Use the average depths of the Pacific, Atlantic and Indian...