Recent content by flash9286

Sorry if this is a stupid question but can someone give me a quick conceptual overview of what causes drag. I was thinking that it is caused by the object moving through the fluid collides with the fluid particles and by Newton's 3rd law the fluid particles impart a force on the object in...

Never mind guys, I just checked my work on maple and the answers I had first were right, I should stop second guessing my self :),

\int_{0}^{3} pi*9^2-(pi*(9-9+x^2)^ dx is what the second integral maybe?

Thats what i get when I put it into my ti-83. I'm pretty sure that the first one is right. But I'm having a hard time imaging the shape you get when you rotate the area around y=9.

The first integral would be, I think: b=3,a=0, on the integral pi*(9-x^2)^2 The second one, which I'm not sure about, would be same b and a, on the integral pi*(9-(9-x^2))^2

If the region bounded by y=9-x^2,y=0,x=0. Is rotated about the x-axis the what would the volume be. I'm got 407. For the same region rotate about the y=9, and i got 153. Can someone check these answers i think they are wrong.

Nevermind I got it. Thanks for your help

I'm sorry I don't follow

if you have a*v=s*w how do you get: delta a/a+delta v/v=delta s/s+delta w/w can anybody explain why this is true.