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  1. For a solid sphere, the moment of inertia about an axis through its center is I = (2/5)mR² "roll without slipping" means that ω = v/R so the total KE is KE = ½mv² + ½Iω² = ...

    2 Answers · Science & Mathematics · 03/06/2020

  2. torque τ = F*r*cosΘ where Θ is measured from perpendicular. a) τ = 700N * 0.15m * cos0º = 105 N·m b) τ = 105N·m * cos40º = 80 N·m c) a longer wrench! Hope this helps!

    2 Answers · Science & Mathematics · 03/06/2020

  3. ....org/content-standards/tasks/621  but replace 5cm, 3cm 14 cm by 5 inches, 1 inch, 8 inches One straight section is...

    3 Answers · Science & Mathematics · 03/06/2020

  4. ...2hv * dh/dt h^2 = 81 h = 9 1620 = 81 * v 20 = v dV/dt => 9^2 * 0.006 cm^3/hr + 2 * 9 * 20 * 0.003 cm^3/hr => 0.003 * (2 * 9^2 + 2 * 9 * 20) cm^3/hr...

    1 Answers · Science & Mathematics · 03/06/2020

  5. ...dr  =12pi(r_outer)   dV/dt = dV/dr * dr/dt   so when r_outer = 4.5 cm  dV/dr = 12pi(4.5) = 54pi  cm^3/ cm  dr/dt =   0.04  cm/hour  dV...

    2 Answers · Science & Mathematics · 03/06/2020

  6. General method given here: https://stuff.mit.edu/afs/athena/course/8/8.02-esg/Spring03/www/8.02ch31we.pdf If you post your working, we can check/correct it. I answered another of your ‘last try’ questions a few...

    2 Answers · Science & Mathematics · 02/06/2020

  7. (a) To find velocity, balance the energy and work involved. Spring potential energy generated will balance with the final kinetic energy minus the work done by friction and work done by the applied force. ½kx² = ½mv² - fx - Fx...

    1 Answers · Science & Mathematics · 31/05/2020

  8. da/dt = 2 cm/min dA/dt = 5 cm^2/min db/dt = ? a = 8 A = 93 A = (1/2) * a...

    1 Answers · Science & Mathematics · 01/06/2020

  9. ... + 9(1)] s(1.5) - s(1) = (13.5 - 27 + 13.5) - (4 - 12 + 9) s(1.5) - s(1) = 1 cm s(2) - s(1.5) = [4(2)³ - 12(2)² + 9(2)] - [4(1.5)³ - 12...

    1 Answers · Science & Mathematics · 30/05/2020

  10. 1 mole = 22.4 liters 22.4 liters × .005 = .112 liters = 112 cm³ ³√112 = 4.82 cm edge length.

    1 Answers · Science & Mathematics · 28/05/2020

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