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Astronomy | Astrophysics
Imagine that you live in a geometrically flat universe which is dominated by radiation. Hubble's constant in this universe is measured to be 70km s−1 Mpc−1 . A Mpc (Mega-parsec) is a million parsecs, and a parsec is 3.086×1016m .
How old is this universe (in billions of years)?
How old is this universe (in billions of years)?
Astronomy | Astrophysics
A robot is pushing a box across a floor. The robot exerts a constant horizontal force. The box moves with constant velocity, neither accelerating nor decelerating. Which is true of the force exerted by the robot?
Astronomy | Astrophysics
How much A dice of neutron star material would weigh ?
Astronomy | Astrophysics
A large planet orbiting a distant star is discovered. The planet's orbit is nearly circular and close to the star, the orbital distance is 7.5 cross times 1010 m , and its period is 105.5 days. calculate the mass of the star
Astronomy | Astrophysics
what and when are solstices and equinoxes
Astronomy | Astrophysics
If you were able to look down at our solar system from above, would the
Earth be rotating clockwise or counter clockwise? Motivate your answer..
Earth be rotating clockwise or counter clockwise? Motivate your answer..
Astronomy | Astrophysics
What is the vernal equinox
Astronomy | Astrophysics
Find out what did they learn from their parents/grandparents about stars and other heavenly bodies
Astronomy | Astrophysics
Imagine that you are measuring the location of two objects using cylindrical polar coordinates. The first is at r=10.32 , θ=−0.32 and z=45.3 . The second is at r=10.33 , θ=−0.31 and z=45.27 .
How far apart are these two points?
How far apart are these two points?
Astronomy | Astrophysics
Imagine that you live in a geometrically flat universe which is dominated by radiation. Hubble's constant in this universe is measured to be 70km s−1 Mpc−1 . A Mpc (Mega-parsec) is a million parsecs, and a parsec is 3.086×1016m .
How old is this universe (in billions of years)?
keep in mind it is a radiation dominated Universe.
How old is this universe (in billions of years)?
keep in mind it is a radiation dominated Universe.
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#339914 on Dec 2023
#339914 on Dec 2023