Recent content by Kruz87

Hello everybody, I'm told that potassium permanganate is dissolved in an aqueous buffer of ammonia and ammonium at equal concentrations (1M), and treated with 1M sodium hypochlorite, the permanganate ion is reduced to insoluble manganese dioxide as the hypochlorite ion is oxiddized to...

Hello everybody, I'm having difficulty understanding the rationalization behind the strengths of Bronstend Lowry acids and bases and my textbook isn't too helpful. Can someone please expalin to me: (1) What exactly is effective negative charge density? (2) how does electronegativiy correspond to...

Rolling Friction? Can someone explain to me why the frictional force is in the same direction as the acceleration of the center of mass of a rolling object?

was asked to consider the solubility for hydrated calcium sulfate in HCl. The principal acid my proffesor had posted for the solution was [ CaSO4(hyrdrated) + HCl <--> H30^+ + Ca^2+ + SO4^2- ]. I guess what I'm asking is what happened to the Cl^- and why isn't it reacting with Ca^2+ to produce...

Thanks, I got the crate's y displacement to be .686 meters and from there I was able to get the correct work of the force and gravity. However, I'm still having trouble finding the force magnitude of the F(applied) when the crate is in the last position. I assume the last position, I know...

Homework Statement Can someone just give me some kind of idea of where to start, I've really been stressing over this alot... A 303 kg crate hangs from the end of a rope of length L = 12.1 m. You push horizontally on the crate with a varying force to move it distance d = 3.56 m to the side...

Thanks alot, that got me to the right answer

You might want to try a different approach to get your problem solved...

Homework Statement A light plane attains an airspeed of 470 km/h. The pilot sets out for a destination 840 km due north but discovers that the plane must be headed 24.0° east of due north to fly there directly. The plane arrives in 2.00 h. What were the (a) magnitude and (b) direction of the...

Ok, I see what you mean now, it just made since to use t=.5s because we had a horziontal distance for that value, Thanks again

Yep, that was right! Thanks a lot Doc Al.

Or rather time t=.5s using x-x0=1.96 m

Does that mean that I can take the velocity at any time t?

the horizontal component of velocity is constant.

Q: A small ball rolls horizontally off the edge of a tabletop that is 1.23 m high. It strikes the floor at a point 1.96 m horizontally away from the edge of the table. (a) How long is the ball in the air? (b) What is its speed at the instant it leaves the table? So this is what I did, i...