On Jan 2, 11:38 am, Sam Wormley wrote:
On 1/2/10 12:04 PM, oriel36 wrote:

The equatorial region of Venus rotates at 6.5 km per hour while the
Earth's equatorial region rotates 1669.8 km per hour and a full
40,075 km rotation in 24 hours.

A much more meaningful way to relate rotations, is in terms
of angular velocity. Or State the 360 rotation in earth days.

For the Earth, the angular velocity is 0.72921158553 10^-4 rad/s.
For the Earth, one rotation takes 0.997269566 days

For Venus, it is 2.99244922 10^-7 rad/s
For Venus, one rotation takes 243.0185 days

That's important (IMO) from the standpoint of extra-terrestrial
geologics (I should be corrected on that term) since Venus
would have very slight solar tidal input and has no tectonic
formations, unlike it's it's sister planet Earth.
This causes me to doubt the radioactive theory of mantle
convection within the Earth, and instead place the tectonic
effects on the tidal input of the moon and Sun, where Earth
is concerned.
There ya go Sammy.
Ken