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cosΘ = adj / hyp = z / √(z²+

**R**²)1 Answers · Science & Mathematics · 05/09/2019

For z >>

**R**, E = qz / [4πε₀*(z²+R²)^(3/2)] ≈ qz / [4πε₀...2 Answers · Science & Mathematics · 04/09/2019

... below the q. Right! • F=m*g • [K|q1||q2|]/

**r**^2=m*g Yep. I'd write it as weight = electrostatic force m*g = ...1 Answers · Science & Mathematics · 03/09/2019

The fi

**r**st step is to calculate the ve**r**tical and ho**r**izontal components of the tennis ball’s initial velocity. Ve**r**tical = 59.8 * sin 15 (15.5 m/s) Ho**r**izontal = 59.8 * cos 15 (15.8 m/s) Du**r**ing one half of the time, the tennis ball’s ve**r**tical velocity...3 Answers · Science & Mathematics · 02/09/2019

The unrounded answer from part a) is 3.2344x10^17 N/C. It's best to use this unrounded value in part b). The force on charge q in field E is simply F = qE. We can ignore the electron charge's minus sign as we are only...

1 Answers · Science & Mathematics · 04/09/2019

... in coulombs F is force in newtons

**r**is separation in meters k = 8.99e9 Nm²/C²1 Answers · Science & Mathematics · 01/09/2019

...do need to include the uncertainty from the first part. Volume = 4/3 pi()

**r**^3 Density = mass / volume You can do this by"rule of thumb"...1 Answers · Science & Mathematics · 31/08/2019

... in coulombs F is force in newtons

**r**is separation in meters k = 8.99e9 Nm²/C²1 Answers · Science & Mathematics · 31/08/2019

...net charge of 12 + 5 - 8 = 9 uC. So if al three spheres touch

**r**the same time, all three end up with +3 uC. Part c --> the magitude...2 Answers · Science & Mathematics · 31/08/2019

... in coulombs F is force in newtons

**r**is separation in meters k = 8.99e9 Nm²/C²1 Answers · Science & Mathematics · 29/08/2019