Recent content by pinkybear

Homework Statement A scale is adjusted so that when a large, shallow pan is placed on it, it reads zero. A water faucet at height h = 3.1 m above is turned on at t=0 and water falls into the pan at a rate R = 0.16 kg/s. Determine a formula for the scale reading as a function of time t for t...

Homework Statement A fire hose for use in urban areas must be able to shoot a stream of water to a maximum height of 35 m. The water leaves the hose at ground level in a circular stream 3.5 cm in diameter. What minimum power is required to create such a stream of water? Every cubic meter of...

Homework Statement The binding energy of a two-particle system is defined as the energy required to separate the two particles from their state of lowest energy to r=infinity. The potential energy of the two atoms in a diatomic (two-atom) molecule can be written U(r)=-a/(r^6)+b/(r^12) where...

Oh my god...I added the density and I got 2.3*10^4, which is correct... but I ran out of time. UGH! I hate my life. But, thank you for your help.

edited: oh wait, i think I get what you mean... so I got sqrt((3*r*v^2)/(4*pi*G))=R <radius of asteroid but what do I use for r? r=R+a small number? which would equal R?EDIT!:omggggggg I am so stupid ok.. let me do it again!

using F=m*(v^2/r) and F=GMm/r^2 i got r=GM/v^2 M=4/3 pi r^3 r=sqrt((3*v^2)/(4*pi*G)) got r= 1.2*10^6 it's not the correct answer..

Sorry, I don't understand what you mean. Why do I need the radius of the orbit of the ball? =(

Homework Statement A spherical asteroid has a density of 2600 kg/m^3. I throw a ball at the speed on 20 m/s. If the ball is to travel in a circular orbit, what is the largest radius of the asteroid possible to accomplish this? Homework Equations these are the equations I used.. escape...