0
A planetary nebula expands with a velocity of 20 km per sec How old is the nebula in years if its diameter is half of a parsecs when assume the nebula is spherical?
Backgong2
(0.25 light year) / (20 km per second) = 14,990 years (rounded)
Numbers used:
1 LY = 5.8787 x 1012 miles
1 mile = 1.609344 km
1 day = 86,400 sec
1 yr = 365.23 days
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoAdd your answer:
Earn +20 pts
Why are galaxies are a disk and not like a spherical object?
Galaxies are generally disk shapped, rather than spherical because of centrifugal force: Just like throwing a pizza crust in the air, it expands in the direction of its rotation. However, older galaxies (possibly the products of collisions of two or more galaxies) can result in blob-shapped galaxies that are more spherical.
Matter expands or contracts to fill the space available?
Liquid Not liquids,gases.
If matter expands to fill the volume of its container it is a?
if matter expands to fill the volume of its container its a suspension.
When water at 4 degrees c is heated it expands When water at 4 degrees c is cooled it?
expands.
When you breathe in what expands?
what
What stars atmosphere expands a million times?
The star's atmosphere that expands a million times is called the planetary nebula. It is able to expand between 200 to 800 times the radius of the sun.
Why are galaxies are a disk and not like a spherical object?
Galaxies are generally disk shapped, rather than spherical because of centrifugal force: Just like throwing a pizza crust in the air, it expands in the direction of its rotation. However, older galaxies (possibly the products of collisions of two or more galaxies) can result in blob-shapped galaxies that are more spherical.
Why Fluid Speed Increases in the Divergent Portion of a Convergent-Divergent nozzle?
Because the fluid is allowed to expand in the nozzle it increases velocity to fill in the voids created by the shape of the nozzle. The convergent point of the nozzle acts like a bottleneck trying to slow the fluid and compress it into the reduced crosssection of the nozzle. As it leaves the minimum crosssection it expands into the divergent spaces of the nozzle increasing in velocity as it expands. ++_+ No: it gains velocity through the convergence but in the diverging section, trades velocity for pressure.
Is a planetary neblua surrounded by planets?
The term "planetary nebula" is a bit misleading - it is a blob of glowing gas which expands from red giant stars late in their lives, thought to be pushed out from the outer layers of the stars by their stellar wind. There is a chance some planets may have been around at the time of the expansion, but that is by no means mandatory nor really indicative of the origin of the name.
Why frying pan does not expand on heating?
Every pan in general expands at least several nanometers in diameter when heated. Heat in general causes expansion of all materials.
How a star becames a white dwarf?
A white dwarf is the core of a dead star. As the star runs out of fuel, it expands into a red giant, as the shell of the red giant became a planetary nebula, and the core shrinks and became a white dwarf.
Why temp drops during throttling?
Throttling is the process of passing gas through a narrow opening at a high velocity. While doing so the gas expands thereby providing a cooling effect.
Matter expands or contracts to fill the space available?
Liquid Not liquids,gases.
What size snake in a 3inch drain cleanout?
The cable is 3/4 to 1 inch diameter with a head that expands with the rotation. For a 3 inch drain you use a powered auger that turns the cable.
Murcury expands when it's hot but what expands when it's cold?
Water expands when it freezes and becomes ice.
How can the proposed expansion of space itself account for distance or velocity of galaxies wouldn't space expand in every dimension leaving proportions the same?
yes, but they don't know that space actually expands though it probably does.
Is Roche lobe a planetary object?
Not really. It's a region of space around a star in a binary system. Anything orbiting the star wil be gravitationaly bound to it and will continue to orbit that star. If the star expands beyond the Roche lobe then the material will fall into the other star.
