Compilation of my math/physics answers from YA!

Yahoo Answers is my favorite site giving me an opportunity to help students and letting me keep in touch with math and physics which are the subjects of my interest. Reading the answers of challenging problems given by subject experts adds to my knowledge. This blog is a compilation of my selected answers given in YA!

Monday, February 4, 2013

Q.469. Indefinite integration.

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Question 469. Integrate cosec^5 (5x) dx. Answer 469. Let 5x = u => 5 dx = du => Integrand = (1/5) ∫ cosec^5 u du ... ( 1 ) ∫...

Q.468. Static Equilibrium, Application of Lami's Theorem

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Question 468. An object of mass 3kg is suspended by two light, inextensible strings. The strings make angles of 30degrees and 40degrees to...

Friday, February 1, 2013

Q.467. Friction - Minimum force to pull a sled against friction.

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Question 467. Imagine you are dragging your sibling on a sled across a flat, snowy surface at a constant speed by hauling on a rope attac...

Thursday, January 31, 2013

Q.466. Electrostatic equilibrium

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Question 466. Three 3.37-g Styrofoam balls of radius 2 cm are coated with carbon black to make them conducting and then are tied to 1.27-m...

Saturday, January 26, 2013

Q.465. Remainder in a large division.

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Question 465. What is the remainder if 5^2009 + 13^2009 is divided by 18 ? Answer 465. Using, For an odd positive integer n, x^n + y^...

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About Me

Madhukar Daftary: Vadodara, Gujarat, India; After working as a chemical engineer in leading industrial houses for 20 yrs., I spent 18 years as a professional tutor of mathematics and physics for std. XII students of Vadodara, Gujarat. I have enjoyed this activity of teaching and am grateful to all those students who provided me the opportunity of serving them.

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