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  1. 2h = g*t^2 g = 2h/t^2 = 10.7/2.55^2 = 1.646 m/sec^2 = M*G/r^2 (G = 6.674*10^-11) M = g*r^2/G = 1.646*5.25^2*10^12*10^11/6.674 = 6.80*10^23 kg

    4 Answers · Science & Mathematics · 17/01/2020

  2. I think we can use field E = λ / 2πrε₀ to find the linear charge density 20e3 N/C = λ / (2π*0.057m...

    1 Answers · Science & Mathematics · 16/01/2020

  3. ...nm = 3.50E-10 m y = y-coordinate of electron = 0.31 nm = 3.10E-10 m r = distance between proton and electron = to be determined r² = x²...

    1 Answers · Science & Mathematics · 10/01/2020

  4. (B) mv^2/r = m*6.45*g = (73.0 kg)(9.81 m/s^2)(6.45) = Around 4500 N but use a calculator. (A) v^2/r <= 6.45*g => r >= v^2/(6.45*g) = (103 m/s)^2/(6.45*9.81 m/s^2) = around 15m but use a calculator.

    1 Answers · Science & Mathematics · 12/12/2019

  5. ...acceleration of the outer edge of the disk? α = angular acceleration = 2 rad/s² r = radius = 0.5 m at = tangential acceleration = to be determined at = αr at...

    3 Answers · Science & Mathematics · 16/12/2019

  6. ...  88.2 - 11.48 = 76.72 N Centripetal force is mv^2/r (76.72×1.6/1.17)^.5 = velocity = 10.24 m/s Update if you need more, and...

    1 Answers · Science & Mathematics · 07/12/2019

  7. Air is pretty close to an ideal gas but you are getting up there in pressure. calculate the density using the ideal gas equation and then check it other published data. https://www.engineeringtoolbox.com/air-temperature-pressure-density-d_771.html this looks like about 240 kg/m^3...

    2 Answers · Science & Mathematics · 09/12/2019

  8. ...18v*0.5A = 25W Consumed by resistance P = i²*R: 1²*4Ω+(1/2)²*12+(1.5)²*8 = 25W ...

    2 Answers · Science & Mathematics · 06/12/2019

  9. .../rot = 4π rad/s, ω_w = 1.3*4π rad/s = 16.3 rad/s and so v_w = ω_w * R_w = 16.3rad/s * 0.35m = 5.7 m/s ◄ 2. From s = ½at² we...

    1 Answers · Science & Mathematics · 01/12/2019

  10. ... the drag coeff (0.5 for a sphere) A the cross-section area PI*r^2 in m^2 ρa the density of air equal to 1.25 kg/m^3 V the speed in m/sec...

    3 Answers · Science & Mathematics · 29/11/2019

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