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Astronomy | Astrophysics
a) The comet Encke has an aphelion distance of 6.1X10^11 m and perihelion distance of
5.1X10^11 m The mass of the sun is 2.0X10^30 kg. Find the speed of the comet at the
perihelion and the aphelion.
b) The planet earth is 1.5X10^11 m from the sun and orbits the sun in one year. The planet
Pluto takes 248 years to orbit the sun. How far is Pluto from the sun?
5.1X10^11 m The mass of the sun is 2.0X10^30 kg. Find the speed of the comet at the
perihelion and the aphelion.
b) The planet earth is 1.5X10^11 m from the sun and orbits the sun in one year. The planet
Pluto takes 248 years to orbit the sun. How far is Pluto from the sun?
Astronomy | Astrophysics
Why the Sun looks red in the morning?
Astronomy | Astrophysics
The moon is 1.3 light seconds away. Estimate the eartand moon distance if c=3.0*10^8 m/s
Astronomy | Astrophysics
sir i m a student from odisha of class xi....i have some doubts...
1. When mercury is dipped in glass then a convex meniscus is formed…..then for which material mercury forms concave meniscus?
2. When water is kept inside a glass then a concave meniscus is formed resulting in the increase in the surface area.........But liquid always try to occupy lesser surface area...Then how could this situation be poissible?
3.In Toricelli's Barometer the rise in Hg in the jar is due to the pressure from the Hg in the tube.....Then how could this pressure be gauge pressure?
1. When mercury is dipped in glass then a convex meniscus is formed…..then for which material mercury forms concave meniscus?
2. When water is kept inside a glass then a concave meniscus is formed resulting in the increase in the surface area.........But liquid always try to occupy lesser surface area...Then how could this situation be poissible?
3.In Toricelli's Barometer the rise in Hg in the jar is due to the pressure from the Hg in the tube.....Then how could this pressure be gauge pressure?
Astronomy | Astrophysics
A satellite is revolving around a planet of mass M in an elliptical orbit of semi-major axis "a"
What will be the orbital velocity of the sattelite at a distance r from the focus.?
What will be the orbital velocity of the sattelite at a distance r from the focus.?
Astronomy | Astrophysics
Given:G= 6.67259×10E−11Nm2/kg2.
A 1520 kg geosynchronous satellite or-
bits a planet similar to Earth at a radius
1.93×10E5
km from the planet’s center. Its
angular speed at this radius is the same as the
rotational speed of the Earth, and so they ap-
pear stationary in the sky. That is, the period
of the satellite is 24 h
.
What is the force acting on this satellite?
A 1520 kg geosynchronous satellite or-
bits a planet similar to Earth at a radius
1.93×10E5
km from the planet’s center. Its
angular speed at this radius is the same as the
rotational speed of the Earth, and so they ap-
pear stationary in the sky. That is, the period
of the satellite is 24 h
.
What is the force acting on this satellite?
Astronomy | Astrophysics
how to calculate the time period of a satellite to complete one revolution around earth's surface?
Astronomy | Astrophysics
Explain how Neptune really is a planet. Titius-bode law and the structure of Neptune
Astronomy | Astrophysics
is it possible that Neptune would leave its orbit and travel to Earth (2012) based on laws of motion, velocity, positions of the planets ect.?
Astronomy | Astrophysics
Can you please explain theories for and against dark flow?
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