Recent content by katia11

Homework Statement Prove that, if f is continuous on [a,b] and ∫ab= l f(x) l dx = zero then f(x) = 0 for all x in [a ,b]. Homework Equations Hint- from book- Section 2.4 Exercise 50 Let f and g be continuous at c. Prove that if: (a) f(c) > o, then there exists delta > o such...

Homework Statement What are the dimensions of the base of the rectangular box of the greatest volume that can be constructed from 100 sq inches of cardboard if the base is to be twice as long as it is wide? Assume the box has no top. Homework Equations V box = lwh A = lw ? The...

45 degrees? I think I was confused because I made the middle charge the origin and thought the angle came from that. . . And I don't really understand why we split the -4q because if one if +q and one is -5q we would get a net result of -4q anyway. . . I assume the direction is towards...

Ok awesome! So now I have F15= (2ke3q2)/(b2) N and F35=(2ke4q2)/(b2) N But how do I find the x and y components without numbers? Do I just put in F15x= F15 sin(135) F15y= F15 cos(135) and F35x= F35 sin(135) F35y= F35 cos(135) The fact that there's no value for q...

Homework Statement (a) Find the resultant force on a negative charge of -3q, placed at the center of a square of side b, which has charges on the 4 corners, respectively, q, 2q, -4q, 2q in clockwise order. (Magnitude and direction)Homework Equations F= k*q1*q*(1/ r^2) Ftotal= F15 + F25 + F35...

Hi! Thanks for the suggestions. Definitely considering the Canadian one; unfortunately the Coasline Com. College one has already started. @ Sankaku- I definitely would plan on doing Calc 2 first; however, I've learned a good portion of the material already, and thought perhaps if the...

It seems so. . . we are looking for the magnitude of the velocity resultant, so we aren't concerned with the new direction. I'm getting all paranoid because it seems simple lol. Good luck!

Ah. That is fine! You haven't covered integration in Calc 1 yet. Which is fine. I'm guessing this is still calc based physics and therefore it's ok to use calculus in your answers. You have learned about derivatives a bit? Integrals are often referred to as an "anti-derivative". So a...

Hello all! As it turns out, I have a condition that requires me to not be at a physical university this semester, but I would like to try and catch up a bit and also need to make my time off more productive. I would like to take a couple of math courses, particularly Calculus 2 and...

Hello! I'd like to try and help. I hope it is right! We have two directions, North and East. Thus East = x axis, North = y axis. I'm sure you had that, but just saying. We know that the resultant a is in the east direction and is 1.9 m/s^2. Thus, the y component is zero. So a = ax...

For your first equation, you probably meant (delta x)= Vi(initial velocity of x) * (delta t) And for clarification. . .is the initial height the same as the final height? From reading the question it seems like it is launched above the table, and then hits the table. Remember that Vix= Vi...

Replies! Thanks again. @twofish-quant- Oh man that changes things- the undergrad, grad thing. I read this on MIT's admissions website "The most common graduate school destination for MIT undergrads is MIT itself; many departments enthusiastically recruit their own undergrads into their...

Oh wow thanks for the replies! Interesting stuff. Lol I know a degree from Cornell and UChicago would be excellent. I was just wondering if anyone knew about SUNY Buffalo. I'm not saying it has to be as competitive as an Ivy/MIT, just wondering if anyone knows. Responding to Bourbaki-...

Hi! I know everyone pretty much comes on here asking the same things, but I'm getting pretty confused and upset and thought I'd post. Since my junior year of high school I've wanted to be a physics major. Unfortunately I'm not one of those genius kids who do nothing but problem sets and...

Yes, I posted this because I was unsure about the signs of the two distances. That makes much more sense. Thank you very much!