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1. ### conservation of mass finding time?

... the tank contains 900 kg of water, the z = 0.9 m, so the LHS of EQUATION S is 3/7 of 1 second, 3/7 = 5/7 - 0...

2 Answers · Science & Mathematics · 14/03/2012

2. ### Generalized Hooke's Law in Stiffness form derivation?

Hooke's Law for isotropic materials http://www.efunda.com/formulae/solid_mechanics/mat_mechanics/hooke_isotropic.cfm

2 Answers · Science & Mathematics · 07/11/2013

3. ### How to find the equation of a circle?

...39;s first find the intersection point of the tangent lines: subtract the LHS of the second eqn from that of the first eqn. 3y + 13 + 3y + 1 = 0 6y...

1 Answers · Science & Mathematics · 17/02/2012

4. ### Help with statics question.?

..., so the only vertical forces in the cut members in the LHS of the truss are in CG. Then the vertical load in CG...

1 Answers · Science & Mathematics · 31/01/2012

5. ### Mathematics Differential equations help please!?

(11-2x)/((x+3)(x+1)) dx = dt. Take a integration!!!

2 Answers · Science & Mathematics · 21/01/2012

6. ### Can someone help me solve this? tan s is over 1+cos s + sin s is over 1-cos s = cot s + sec s csc S?

... tan⁡ s/(1+cos ⁡s )+ sin⁡ s/(1-cos ⁡s )=cot⁡ s+(sec⁡ s x csc ⁡s) LHS = tan ⁡s/(1+cos⁡ s )+ sin⁡ s/(1-cos ⁡s ) (tan⁡ s(1-cos⁡ s)+sin⁡ s(1+cos...

1 Answers · Science & Mathematics · 17/01/2012

7. ### how do I get from [1/((1/(80+j80))+(1/(20e^(-j90)))] to 22.6e^(-j81.9)?

Put the LHS all in cartesian form and collect common terms, then convert to polar form. ...e. (80-j80). This remove the j term from the denominator. Second part of LHS is converted using Re^(jθ)=Rcosθ+jRsin...

2 Answers · Science & Mathematics · 25/04/2013

8. ### Trigonometry....sine, cosine, tangent question?

Put the whole left side (LHS) into sines and cosines: tan^2 = sin^2 / cos^2 csc^2 = sin^-2 sec...sin^2 * (sin^2 * cos^2)) / (cos^2 *(cos^2 + sin^2)) cancel the cos^2 and rearrange: LHS = (sin^4) / (cos^2 + sin^2) sin^2 + cos^2 = 1, so LHS = sin^4 Now...

1 Answers · Science & Mathematics · 23/11/2011

9. ### Please solve by induction? I got close but ended up with an unbalanced term =(?

To show it to be true for n = k + 1, you have the left hand side equal to 1^2 + 2^2 + ... + k^2 + (k+1)^2 Subbing your assumption for it being true for n = k gives k(k+1)(2k+1)/6 + (k+1)^2 Then the algebra goes as follows: = [k(k+1)(2k+1)/6] + k² + 2k + 1...

1 Answers · Science & Mathematics · 07/11/2011

10. ### Express A and B of equation y=Acos(wt) + Bsin(wt) in terms of R and d of equation Rcos(wt-d)?

... to perform it the other way round, i.e. starting from the LHS. A final point is notice that A^2+B^2=R^2((sin^2...

1 Answers · Science & Mathematics · 25/04/2013