Recent content by crispy_nine

Thanks for the helpful insight so far. It is now clear to me that f(0,0) exists and is zero, so basically all I have to do to show that the function is continuous is prove that the limit of ysin(1/x) exists and is zero as (x,y) goes to (0,0). Now, how is that possible if the limit of (1/x)...

Hey folks, I have this one problem that seems unclear to me: Show that the function f is continuous at (0,0) for f(x,y) = ysin(1/x) if (x,y) do not equal (0,0)...and 0 if (x,y) = (0,0) I'm thinking though, as with single variable calc, f is continuous at...

At the moment I'm trying to figure out charged particle in electric field behavior and there's a type of question that seems to be confusing me lots. Ok, here's such a question that I'm not sure about: A virus rests on the bottom plate of oppositely charged parallel plates in the vacuum...

Hi, I have a tricky question, and was hoping somebody could explain to me how I would go about solving it. Here it is: Oil having a density of 930 kg/m3 floats on water. A rectangular block of wood 4.00 cm high and with a density of 960 kg/m3 floats partly in the oil and partly in the...

Thanks a lot, I understand how to find the velocity, but I'm still doing something wrong to get the max possible V if max T can be 9.8N. Ty = mg= 4.9N. What I'm doing to find max V is finding max Tx...so sqrrt(9.8^2 - 4.9^2) = 8.49N = (m X v^2)/ 1.5msin30. This is apparently wrong...the correct...

Hey, I've puzzled my puzzler sore on this question for my physics assignment: A 0.50-kg ball that is tied to the end of a 1.5-m light cord is revolved in a horizontal plane with the cord making a 30° angle with the vertical. (a) Determine the ball’s speed. (b) If the cord can withstand a...