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  1. ... complete symmetry under all (abstract) rotations. That would imply spherical symmetry (shape?). A spin 1/2 particle (such as electron) has a strange 720...

    2 Answers · Science & Mathematics · 14/10/2020

  2. ...of course, a sphere of radius r centered on your charged spherical shell. The enclosed charge at radius r (for a < r...

    1 Answers · Science & Mathematics · 09/09/2020

  3. The net charge of spherical conductors q2 and q3 is zero. Let q1 be +q1. In this...

    1 Answers · Science & Mathematics · 20/09/2020

  4. Total volume of gas is 72 breaths x 108 x pi cc/breath = 7776 x pi cc Assuming the balloon is spherical ,  V = 4/3 x pi x r^3 = 7776 x pi cc r ^3 = 7776 x 3/4 cc r = 18 cm

    2 Answers · Science & Mathematics · 12/08/2020

  5. ... - 10y = 0 r² - 10rsin(θ) = 0 Now to convert from cylindrical to spherical , use this: r = ρsin(φ) r² - 10rsin(θ) = 0 ρ²sin²(φ) - 10ρsin...

    1 Answers · Science & Mathematics · 25/06/2020

  6. By F(applied) = F(upthrust) by bobber + F(upthrust) by fishhook & bait - F(gravity) of bobber - F(gravity) of fishhook & bait => F(applied) =  [Vd(water)g]bobber + [Vd(water)g]fishhook & bait  - 0.005 x 9.8 - 0.01 x 9.8 => F...

    1 Answers · Science & Mathematics · 14/07/2020

  7. Given dV/dt = 0 , r=20 , h=2 , dr/dt = 0.5 . Find dh/dt (r+(h/2))^3-(r-(h/2))^3 = 3hr^2 + (h^3)/4 dV/dt = 0 ---> 3(r^2)(dh/dt)+6hr(dr/dt)+(3/4)(h^2)(dh/dt) = 0 substitute values --> dh/dt = -40/401 cm/s

    2 Answers · Science & Mathematics · 01/08/2020

  8. Volume * Density of  sea water * 9.8 =  4π/3 * 1.9³ * 1025kg/m³ *  9.8 =  288,600 N <<<<< 288,600 - 27,600*9.8 = 18,122N or about 18,100 N <...

    1 Answers · Science & Mathematics · 22/06/2020

  9. V = (4/3)πr³ S = 4πr² We need to find the rate of the radius shrinking because dV/dt = dV/dr * dr/dt = 4πr² * dr/dt = -1.5m³/min dr/dt = -1.5/4πr² ds/dt = ds/dr * dr/dt = -8πr * 1.5/4πr² = -3/r m²/s -3/4...

    1 Answers · Science & Mathematics · 15/03/2020

  10. V = (4/3)πr³  dV/dt = 4πr².dr/dt so, when the diameter is 20 cm we have: -4π = 4πr².dr/dt Hence, dr/dt = -1/r² i.e. dr/dt = -1/10² => -1/100 Now, d = 2r so, d(d)/dt = 2.dr/dt => d(d)/dt = -1/50 cm/hour or, -0.2 mm/hour :)>

    3 Answers · Science & Mathematics · 15/08/2020

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