Saturday

April 18, 2015

April 18, 2015

Posted by **Andy** on Sunday, October 11, 2009 at 10:00pm.

9.01×10-1 is the correct ratio

Calculate the average density of Venus (in kg/m3) given the earth's density is 5.52×103 kg/m3.

this is the part I'm having trouble with.

Any help would be greatly appreciated thanks!

- Physics -
**MathMate**, Sunday, October 11, 2009 at 10:35pmThe general gravitational attraction formula is

F = GMm/r²

from which g= F/m = GM/r²

To find the value of acceleration on Venus relative to the value on earth, we have

g*0.8140/(0.95)²

=0.9g

Density = mass / volume

Since volume of a sphere is proportional to the cube of the radius

Density = mass / volume

=mass /((4/3)πr³)

Let the average density of earth be

ρ=5.52*10³ kg/m²

density on venus (by proportions)

=ρ*0.8140/0.95³

=0.95ρ approx.

**Answer this Question**

**Related Questions**

PHYSICS - THE MASS OF VENUS IS 81.5% OF THE EARTH AND ITS RADIUS IS 94.9% THAT ...

physics - Venus has radius 6.05 x 10^6 m and mass 4.87 x 10^24 kg. Calculate the...

physics repost - Venus has radius 6.05 x 10^6 m and mass 4.87 x 10^24 kg. ...

Physics....Orbiting Satellite - A orbiting satellite stays over a certain spot ...

physics - A planet has a radius of about 0.85 times Earth's radius and a mass ...

physics - A hypothetical planet has a radius 1.1 times that of Earth, but has ...

Astronomy - Need some help with Astronomy. I need to figure out the acceleration...

Physics - 1. Planet X orbits the sun with a mean orbital radius that is 6200 ...

Physics - A. Use the relation 2 m m m GM g R ƒ to find the acceleration due to ...

Physics - If the mass of a planet is 0.571 times that of the Earth and its ...