Posts Tagged ‘altitude’
PHYSICS ………………………….?
An airplane traveling horizontally at 160km/hr and a altitude of 800m drops medical supplies to an island.
A) How many seconds prior to the plane being directly over the island should the pilot release the supplies ?
B) What is the horizontal distance traveled by the supplies?
How many geostationary satellites would it take to cover the earth's surface?
I’ve figured via Keplers 3rd law that mean altitude for a satellite is about 42,000Km and subtracting Earth’s radius gives an altitude of 35000Km. However, what if you wanted a satellite system to give full coverage of the earth’s surface, how can you calculate the number of geostationary satellites needed. Is it possible to cover the entire surface or is their a maximum percentage of Earth;s surface a geostationary system can cover?
How would the curved space theory explain an object falling to the ground?
I got the following answer in a question I asked about curved space:
"General relativity says that there is "no" gravity force, the gravity is described via curved space. All objects move without additional external force along a straight line in curved spacetime and the geometry of the spacetime is dictated by the present mass/energy"
How would the curved space theory explain why an object falls to the ground when dropped from an altitude?
How do you calculate the gravitational attraction between the earth and something in Earth's orbit?
Example: Earth’s gravitational field is 7.97 N/kg at the altitude of the space shuttle. At this altitude what is the size of the force of attraction between a student with a mass of 42.5 kg and Earth?
How many miles would a space shuttle have to go above earth to be completely unaffected by earth's gravity?
Assume that the space shuttle is just an average NASA shuttle. By "completely unaffected" by gravity, I mean that it would be able to just keep on going at the same speed indefinitely [assuming it never came into contact with other gravitational sources], because there was no friction or gravity [for example, if you jumped off the shuttle at whatever altitude you specify, you would just keep on going forever].
okay, I know that nothing can be completely unaffected by gravity. Just give me the altitude where the effect of EARTH’s gravity will be virtually zero/negligable, and you could do the things specified in the question.
What maximum distance from Earth’s surface does it travel before falling back to Earth?
A rocket is fired straight up through the atmosphere from the South Pole, burning out at an altitude of 218 km when traveling at 5.7 km/s.
(a) What maximum distance from Earth’s surface does it travel before falling back to Earth?
(b) Would its maximum distance increase if it were fired from a launch site on the equator? Why?