Recent content by mandymanny

thank you everyone :] i got it

Nevermind I got it. Answer is B :)

yes? when i integrate, it's y^-1/-1 right? not just y^-1 ??

Parametrize? sorry but what does Parametrize mean?

Homework Statement The Shortest distance from the curve xy=4 to the origin is: A. 2 B. 4 C. rad (2) D. 2* rad (2) E. .5 rad(2) Homework Equations ... distance equation? The Attempt at a Solution i used the pythagorean theorem to find the distances using x^2 and y^2 as a^2...

Homework Statement If dy/dx=xy^2 and x=1 when y=1, then y= (A) x^2 (B) -2/(x^2 -3) (C) x^2 + 3 (D) 2/(x^2 +1) (E) (x^2 -3)/2 Homework Equations The Attempt at a Solution dy/dx=xy^2 dy=xy^2dx dy/y^2=x dx ∫dy/y^2=∫x dx -1/y = x^2/2 + C y=-2/x^2 + C 1=-2/1^2 + C C=3...

does anyone know where i can find ap cal and/or phyics multiple choice sections of past tests?? i really need them to study. please help

Homework Statement the maximum wavelegnth for which an electromagnetic wave can eject electrons from a platinum surface is 196 nm. when radiation with a wavelength 141 nm shines on the surface, what is the max speed of the ejected electrons? Homework Equations f=c/λ E=hf E=Φ+K...

appologies sorry i copied the wrong problem

Homework Statement in the line spectrum of atomic hydrogen there is also a group of lines known as the pfund series. these lines are produced when the electrons, excited to high energy levels, make transitions to the n=5 level. Determine (a) the longest wavelength and the (b) shortest...