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1. In a city of 2,384 people, at least _______ have the same pair of first and last initials.?

....T. J.U. J.V. J.W. J.X. J....K. K.L. K.M. K.N. K.O. K.P. K...

2 Answers · Education & Reference · 25/06/2013

2. A body of mass 0.2kg is executing simple harmonic motion with an amplitude of 20mm The maximum force which act?

...02 k = 3.2 N/m ω = √(k/m) ω = √(3.2 / 0.2) = √16 = 4 rad/s a. v_max = ω.A => v_max = 4 . 0.02 = 0.08 m/s b. T = 2π√(m/k) => T = 2π√(0.2 / 3.2) => T = 2π . (0,25) => T...

4 Answers · Science & Mathematics · 11/03/2009

3. Differential Equations- Rocket, Need help?

... = m_r*a = -k*m_r = m_r * dv(t)/dt, for t > m_f/b dv(t)/dt = -k v(t) - v_end = -k*t + k*m_f/b, for t > m_f/b v(t) = v_end + k*m_f/b - k...

2 Answers · Science & Mathematics · 19/09/2009

4. An object with mass 3.0 kg is attached to to a spring with spring stiffness constant k = 280 N/m and is?

...gt; c1 put back (v^2) = - k/m (x^2) + k/m (a^2) v^2 = k/m [a^2 - x^2] ----------------------------- given x = 0.02, v = 0.55 0.55^2 = k/m [a^2 - 0.02^2] a^2 = [(m/k) * 0.55^2] + 0.02^2 calculate (a) amplitude -------------------------------- v^2 = k/m [a^2 - x^2] velocity will be maximum when x = 0 ie at mean position by seeing v^2 formula you can know that (- x^2) term is trying to decrease the...

2 Answers · Science & Mathematics · 27/04/2007

5. Physics-amplitude and period of motion?

...mv^2, we can write this as kx * x = mv^2 (k/m) x *x =v^2 but (k/m)x above is equal to a, so we have a...since x is the max value of x P=2 pi sqrt[m/k] we don't know the values of m or k, but know...

2 Answers · Science & Mathematics · 21/11/2009

6. HELP!!!! Oscillation?

...m), so: x=m*g/k*sin(sqrt(k/m)) now we use rule that: v=dx/dt -> v=(k/m)*m*g/k*cos(sqrt(k/m)) = g*cos(sqrt...(v/g) -> k/m=arcos(v/g)^2 -> m=k/arcos(v/g)^2 Data: g = 10 m/s2 ->...

1 Answers · Science & Mathematics · 17/02/2009

7. Difficult Math Problem?

...y + z >= 44. Computing the number of (p,v,w,x,y) such that 5p + 4v + 3w + 2x + y <...1) = m yield a solution of kb_0 + (k-1)b_1 +...+b_(k-1) = m - k by setting b_0 = a_0 -1, b_1 = a_1 and so on, except...

6 Answers · Science & Mathematics · 17/01/2011

8. spring constant problem?

...4x as much. 0.2 x 4 = 0.800s b) 1/0.800s = 1.25Hz c) 0.8 = 2π√(m/k) k = 142N/m roughly d) x(t) = Acos(√(k/m)t) = x'(t...

1 Answers · Science & Mathematics · 26/03/2010

9. AP Physics Damped Harmonic Motion Question?

...mass unit). A) k = 100 N/m, m = 0.05 kg, b = 0.008 kg/s b^2 - 4*m*k = (0.008)^2 - 4*100*0.05) = -20 (underdamped) B) k = 150 N/m, m = 0.05...

1 Answers · Science & Mathematics · 02/04/2015

10. Challenging differential equation for a physics problem( higher math needed)?

... a ≈ g - (c/(m h.e) + c/(m h.e) x) k = c/h.e a ≈ g - k/m - k x but at equilibrium g = k/m, ergo a ≈ -k/m x ********** curses, jdll...

4 Answers · Science & Mathematics · 17/06/2010