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Astronomy | Astrophysics
The Mass of our sun is 2x10^30 kg. Its radius is about 7x10^8 m. If our sun was to collapse into a black hole (all the mass is concentrated into a single point), what would be its event horizon? The event horizon is the edge at which light, which travels at 3x10^8 m/s can not escape.
Astronomy | Astrophysics
If photon's have no mass why is light "bent" by gravity? Again, if photon's have no mass why can't they escape the pull of a black hole?
Astronomy | Astrophysics
You are on a treasure hunt and your map says "Walk due west for 57.1 paces, then walk 70.0 ° north of west for 71.3 paces, and finally walk due north for 64.6 paces." What is the magnitude of the component of your displacement in the direction (a) due north and (b) due west?
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http://edugen.wileyplus.com/edugen/courses/crs3976/art/qb/qu/c01/w1502int.gif
Astronomy | Astrophysics
At what altitude above the earths surface would your weight be three fourths of what it is at the earths surface (assume the radius of earth is 6.371E3
Astronomy | Astrophysics
what would be the period of a planet whose orbit has a semimajor axis of 4 au?
Astronomy | Astrophysics
what is the eccentricity of the orbit of a planet whose distance from the sun varies from 180 million to 220 million km? explain please.
Astronomy | Astrophysics
what is the eccentricity of the orbit of a planet whose distance from the sun varies from 180 million to 220 million km? explain please
Astronomy | Astrophysics
What, if anything, existed before the 'Big Bing' and what started the 'Big Bang'?
Astronomy | Astrophysics
The distance from the sun to the earth is 387 times the distance from the earth to the moon so how many times greater approximately is the volume of the sun to that of the moon
Astronomy | Astrophysics
Hello, I am trying to find out the power emitted from a round element heated at 500 degres celcius, knowing only that and its diameter of 15cm.
