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When we define PE --> 0 as r --> r, such as when calculating escape velocity from a planet with mass ... = GMm/r, the stored energy gets smaller as r --> infinity. And that's just not the physics of energy is...
2 Answers · Science & Mathematics · 16/08/2014
Torque τ = F*R= Iα where I =MR^2/2 and α is the angualar accceleration...and exerts a torque on M giving an angualar accceleration α. a = R α For the mass M, F = I α/R = [MR...
1 Answers · Science & Mathematics · 05/07/2010
|r| = sqrt(5^2 + 10^2) = sqrt(125) = 5 * sqrt(5) r(hat) = (5.00 / (5 * sqrt(5))) i(hat) + (-10.00 / (5 * sqrt(5))) j(hat) r(hat) = (1.00...
2 Answers · Science & Mathematics · 07/10/2010
...you could THEN turn into a fraction. ie ( 2.4 + 0.003)^(-2) < R^(-2) < (2.4 - 0.003)^(-2) 0.173178 < R ^(-2...
4 Answers · Science & Mathematics · 08/09/2019
...absolute (same uncertainty units as the R² & √R values) why not just use the max and min values...56) x 100% = +/- 0.173% ANS repeat same method for √R {the answer can be no more significant than the R value
1 Answers · Science & Mathematics · 08/09/2017
... (1/infinity - 1/R1) = = GMm (0 - 1/R1) = -GMm/R Convenient formula, is not it? In this case the energy ...
3 Answers · Science & Mathematics · 23/04/2008
...you re-draw this ckt you have 6Ω in parallel with R in parallel with E +1Ω in parallel with 3... because the current MUST be down into the R for KVL to be satisfied. Remember...
1 Answers · Science & Mathematics · 08/10/2016
... unlikely so try to the right of the 2µC first. Let r be the distance right of the 2µC 2.8/(r+0.035)² = 2/r²...
2 Answers · Science & Mathematics · 25/05/2017
a) The charge per unit volume is ρ=ρ1 (r/R) where r is the distance from the center. Divide the entire... = π(ρ1)(R^3) b) Let the electric field at a distance r from the center be E. Consider a Gaussian Surface...
2 Answers · Science & Mathematics · 14/04/2009
... by the solid) dV = = ∫[from θ=-π/2 to π/2] dθ ∫[from r=0 to cos(θ)] r dr ∫[from z=0 to r cos(θ)] dz = = π/8 2. This ...
1 Answers · Science & Mathematics · 16/06/2010