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Astronomy | Astrophysics
can a situation exist in which an object has zero acceleration and nonzero velocity?
Astronomy | Astrophysics
Calculate r vector
and v vector in AU and AU/TU respectively for the Halley's comet on September 12, 2014 given
and v vector in AU and AU/TU respectively for the Halley's comet on September 12, 2014 given
Astronomy | Astrophysics
What is cosmic background radiation? Explain why it is so important to the debate between evolving and a steady-state universe.
Astronomy | Astrophysics
The mean distance of Mars from the Earth is 0.5 A.U. and its orbital period is 687 days.
Calculate the orbital period of Jupiter given that its mean distance from the Earth is
4 A.U.
Calculate the orbital period of Jupiter given that its mean distance from the Earth is
4 A.U.
Astronomy | Astrophysics
If the temperature of the background radiation today is 3k , at what time after the birth of universe was the temperature (10)15 k? Take the age of the universe as 15 * (10)9 years .
Astronomy | Astrophysics
An electron is moving with a speed of 0.9c in a magnetic field of strength (10)6 G. Calculate the peak frequency at which the electron will radiate.
Astronomy | Astrophysics
Explain why elements heavier than iron con not form as a result of thermonuclear fusion reaction in nucleosynthesis . Discuss s- and r- processes for the formation of elements heavier than iron.
Astronomy | Astrophysics
A white dwarf star has a mass of (10)30 kg and its luminousity is (10)24 (j)/s . Calculate how long it can survive with its present luminosity of its internal temperature is (10)7 k .
Astronomy | Astrophysics
A star has surface temperature of 25000k . Which lines will be prominent in its spectrum ? Justify your answer?
Astronomy | Astrophysics
The mean distance of mars from the earth is 0.5A.U. and its orbital period is 687 days . Calculate the orbital period of jupitar given that its mean distance the earth is 4A.U.
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