Recent content by joe17857

I need to calculate the thickness needed for a retaining wall for a pond. The information I have is as follows: Depth of pond, area of pond, shear strength of retaining material, unconfined compressive strength of retaining material, length of retaining wall (will only be on one side of pond)...

thanks i got it.

my units are in kg.

ok. solving for M =v^2*r/(2G) and plugging in i got 3.37 x 10^13. does that sound about right?

maybe i could use that and compare it to the escape velocity of the comet somehow but i don't know how. its just a really confusing problem because not much is explained.

the only thing i know is that the escape velocity for the Earth is equal to the square root of (G*mass of earth/radius of earth). our teacher really doesn't explain anything.

and here is the link if you are confused. http://session.masteringphysics.com/myct/problemWork?template=problemView&assignmentProblemID=2736711

[SOLVED] Mass of a comet problem On July 4, 2005, the NASA spacecraft Deep Impact fired a projectile onto the surface of Comet Tempel 1. This comet is about 9.0 {\rm km} across. Observations of surface debris released by the impact showed that dust with a speed as low as 1.0 {\rm m/s} was...