Recent content by Helena54321

Man am I stupid. I never get difficult things misunderstood, it's always the easy obvious most important things that I don't see. THANK YOU! merci! arrigato! xie xie! dou zie! mgoisi!

I know and understand why the c of m of a uniform hemispherical shell (i.e a hollow hemisphere) is r/2 on the axis of symmetry (where r=radius of shell). I looked at the solution of the following question and still don't understand. Question: A hemispherical bowl, which may be modeled as a...

I just did a quiz in a lecture and walked out crying. There was one question (which probably seems very easy to most :/ ) were you had to convert polar equations to cartesian ones. We also had to draw the cartesian graphs (2D). a) rcos(th) b)r=2asin(th) c)r^2sin2(th)=2k...

Hi Andrew, thank you very much for replying to my post :). In the lecture the lecturer said that it was an error in the notes and it should be dv/dt. I just did a test in another lecture and walked out crying. There was one question (which probably seems very easy to you :) ) were you had to...

Hi First ever post on Physics Forum. N2: F=ma can be written as dv/dx=-gy-(bv/m) g=grav. constant b=constant where D(total drag force opposing dir. of...