# Yahoo Web Search

1. Sort by

1. ### How to: Solve for t in seconds and v in meters per second?

v = 5 + 10t --- (1) 30 = (v + 5)t / 2 --- (2) Substituting (1) into (2), we will have: 30... the only answer. Substituting t = 2 into (1), we have: v = 5 + 10(2) v = 5 + 20 v = 25 Hence, the answer is t...

1 Answers · Science & Mathematics · 23/06/2013

2. ### Solve v(to the 2nd power) + 7v = -12?

v^2 + 7v = -12 v^2 + 7v + 12 = 0 Experiment with the factors of 12 until you find 3(4) = 12 and 3 + 4 = 7 (v + 4)(v + 3) = 0 v + 4 = 0 or v + 3 = 0 v = -4 or v = -3

1 Answers · Science & Mathematics · 05/03/2011

3. ### TRIGONOMETRY Let u = 8i + 7j and v = 7i − j.?

u = 8i + 7j → tan(u) = 7/8 v = 7i - j → tan(v) = - 1/7 tan(a - b) = sin(a - b) / cos(a - b) → recall...b)] / [1 + tan(a).tan(b)] → adapt this result to your case tan(u - v) = [tan(u) - tan(v)] / [1 + tan(u).tan(v)] tan(u - v) = [(7/8) - (- 1/7...

2 Answers · Science & Mathematics · 29/04/2019

4. ### zen v charging?

zen v charge fully at about 5-6 hours if you plug it into the computer. However...if you were to charge it using the creative charger/adapter. A zen v can use up to 15 hours for continuous playback. 8-10 hours for normal usage...

1 Answers · Consumer Electronics · 18/09/2007

5. ### solve for r: v= radical(2grh/r+h) ?

v=sqrt((2grh)/(r+h) square both sides v^2 = (2grh)/(r+h) multiply both sides by (r+h) v^2(r+h) = 2grh divide...from each side ((v^2)h)/r = 2gh -v^2 cross multiply to get r = ((v^2)h)/(2gh-v^2)

1 Answers · Science & Mathematics · 26/10/2009

6. ### Determine whether the integral from 2 to infinity of dv/ v^2 + 2v − 3 is convergent or divergent?

Note: v^2 + 2x - 3 = (v + 3)(v - 1). ---------------- Use partial fractions. 1/((v.../(v-1). Clearing denominators yields 1 = A(v-1) + B(v+3). v = 1 ==> 1 = 0 + 4B ==> B = 1/4 v = -3...

2 Answers · Science & Mathematics · 25/02/2014

7. ### Determine whether the integral from 2 to infinity of dv/ v^2 2v − 3 is convergent or divergent?

Note: v^2 2x - 3 = (v 3)(v - 1). ---------------- Use partial fractions. 1.../(v-1). Clearing denominators yields 1 = A(v-1) B(v 3). v = 1 ==> 1 = 0 4B ==> B = 1/4 v = -3...

2 Answers · Science & Mathematics · 08/04/2016

8. ### If u dot (v x w) = |u||v||w|, show that u dot v = u dot w = v dot w = 0?

By definition u.v x w = |v x w| |u| cosθ where θ is the angle between u and v x w...where Θ is the angle between v and w. So u.v x w = |v||w| sinΘ |u| cosθ and this is equal to |u||v||w...

2 Answers · Science & Mathematics · 03/10/2009

9. ### If the magnitude of v = 5, and the magnitude of u = 9. and the dot product of v and u = 21, what is the magnitude of u+v?

Sol. * |v|=5 …so √(〖v_x〗^2+〖v_y〗^2 )=5 ∴〖v_x〗^2+〖v_y〗^2=25……1 * |u|=9 …so √(〖u_x〗^2+〖u_y〗^2 )=9 ∴〖u_x〗^2+〖u_y〗^2=81……2 * dot product v*u=21 ∴v_x u_x+v_y u_y=21……3 magnitude of (v+u)=√((v_x+u_x )^2+〖〖(v...

1 Answers · Science & Mathematics · 24/11/2014

10. ### derivative of function V(t)?

V'(t) = 3(350)[ 1 - e^(-0.0023t)]^2(0.0023e^(-0.0023t)) = 2.415e^(-.0.0023t)[ 1 - e...4.830e^(-0.0046t) + 2.415e^(-.0.0069t) More General Form: V(t) = A[ 1 - F(t) ]^3 V'(t) = 3A[1 - F(t...

1 Answers · Education & Reference · 19/07/2009