Recent content by seichan

Homework Statement A volcano fills the volume between the graphs z = 0 and z =1/(x^2+y^2)^24, and outside the cylinder x^2+y^2=1 Find the volume of this volcano. Homework Equations This is a triple integral to be evaluated in cylindrical coordinates. The Attempt at a Solution...

Is this how you convert the derivative, though? I know how to convert when it isn't the derivative, but...

Alright, I know how to convert from Kelvin to Celsius (subtract 273), but I really don't know how many degrees Celsius are to Kelvin. (I need to convert .021 degK/s to deg/C)

Homework Statement 0.175 kg of water at 88.0 degC is poured into an insulated cup containing 0.212 kg of ice initially at 0 degC. How many kg of liquid will there be when the system reaches thermal equilibrium?Homework Equations Qwater=-Qice q=mc(Tf-Ti) Cwater= 4187 J/kg degC Cice=2090 J/kg...

Thank you very much. I got this far, but tried to use normal trig substitution. IT goes without saying that it didn't really work for me.

Sorry, the problem is x=2e^(2y)

Find the area of the surface obtained by rotating the curve y=2e^(2y) from y=0 to y=4 about the y-axis. Any help on this would be greatly appreciated. This has my whole hall stumped. We know that you have to use the equation 2pi*int(g(y)sqrt(1+(derivative of function)^2), but cannot figure...

Thank you very much!

[SOLVED] Simple Harmonic Motion (Mass on a Spring) Homework Statement A solid cylinder of mass M= 10.8 kg is attached to a horizontal massless spring so that it can roll without slipping along a horizontal surface, as shown in the Figure. The force constant of the spring is k= 346 N/m. The...

Thank you so much again. That was correct =) Your help was greatly appreciated!

Alright. I got you there. My new arithmatic looks like this: .5kA^2=[.5k(.985^n*A)^2]/2 kA^2=.5k(.985^n*A)^2 2A^2=(.985^n*A)(.985^n*A) 2=(.985^n)^2 ln(2)=.985^n Ack! I'm truly sorry- it's been a long night and barely anything seems coherent anymore...

(.5k(A*.985^n))/2=.5kA .5(A*.985^n)=A A*.985^n=2A .985^n=A I feel like I'm missing something there, due to the fact that answer makes no sense. Thanks for baring with me.

Thank you. I do not where to go with that, though, because of having no initial Amplitude. I have, however, derived that I am looking for t=ln(2)/(2*angular acceleration). However, I do not know how to get the angular acceleration without having a known mass value. (a. acceleration=b/2m) Any...

[SOLVED] Dampened Harmonic Motion Homework Statement A mass M is suspended from a spring and oscillates with a period of 0.900 s. Each complete oscillation results in an amplitude reduction of a factor of 0.985 due to a small velocity dependent frictional effect. Calculate the time it takes...

Oops- yeah, that was a mistake I made when I was typing that into here. The other way still comes out wrong.