Recent content by Arshad_Physic

Need help in finding Limits of Integration! :) (Calc 3) Homework Statement Evaluate Integral: f * n dS, where "f" and "n" are vectors and "*" is DOT PRODUCT. Where, where (a) f = (x2, ey, 1), S: x + y + z = 1, x ≥ 0, y ≥ 0, z ≥ Homework Equations ummm none The...

Homework Statement for what values of the constant c is the function f everywhere continous f(x) cx+7 if x<= 2 (cx)^2 +1 if x>2 i don't understand how to do continuous functions so can someone please explain the process?

Problem resolved. Answers.yahoo guys solved it. I don't know how to delete this....:) Thanks to all those who read this though! :) PS: Answer is 10434.78 ft, if someone comes and is looking for answer to this question and stumbles upon this webpage! :D

Homework Statement A long cylindrical wire of stainless steel alloy hangs vertically, supporting only its own weight. What is the maximum length the wire can have without experiencing plastic deformation? E = 28 Mpsi Density = 483 lb/(ft^3) Yield Stress 35 ksi Homework Equations...

Awesome! THanks sooo much! :)

Homework Statement A steel tank of cross sectional area 3 m2 and height 16 m weighs 10,000 kg and is open at the top. We want to float it in the ocean so that it is positioned 10 m straight down by pouring concrete into its bottom. How much concrete should we use? Homework Equations...

thanks so much! This really helps!:)

sorry - I found it! :)

Homework Statement A lens having a focal length 50 cm is used as a simple magnifier. What is the angular magnification obtained when the image is formed at the normal near point (25 cm)? Homework Equations 1) m = N/d, where d is distance of object 2) m = 1 + N/f The Attempt...

Need to clear confusion on a simple lense problem (solution is worked out :D) Homework Statement The following thin lenses are made of glass of index of refraction 1.7 and are in air with index of refraction 1. Find the focal length of a lens with r1 = 22 cm and r2 = 8 cm. Homework...

thanks! :) it works! :)

Homework Statement I have this question. If I can get that formula, I will be able to solve it! :) Here is the question: The current in a 51 mH inductor changes with time as I = b t2 − a t. With a = 20 A/s and b = 7 A/s2, find the magnitude of the induced emf, |E|, at t = 1.2 s...

The explanation by Atticus is nice and correct! :) I second it! :)

Took me a while for me to figure this out! I spent time expanding on the ideas both of you gave me and finally understood what to do! THANKS to BOTH of you! :)

so, I write: lim [sin(x+h) - sin(x))]/h x→0 So, I get: lim [sin(x) cos(h) + cos(x)sin(h) - sin(x))]/h x→0 But now I am stuck again lol - I understand that if I use \lim_{h \to 0} \frac{sin(h)}{h} then my equation should become: lim [sin(x) cos(h) + cos(x)sin(h) ]/h...