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1. ### Physics- the mass of the sled ?

F = mv²/ R a) F = 208(34²)/33 = 7,286.3030... ≈ 7.3 kN b) F = 208(34²)/24 = 10,018.6666... ≈ 10 kN

1 Answers · Science & Mathematics · 14/09/2020

2. ### Spherical physics question?

...surface. Your Gaussian surface is, of course, a sphere of radius r centered on your charged spherical shell. The ...

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

3. ### physics question?

F = k e^2 / r ^2 F = 9x10^9 * (1.602×10^−19)^2 / (1x10^−11)^2 F = 2.31 × 10^-6 N where e =  1.602×10^−19 C is charge od proton k = 9x10^9 N m^2/C^2 is Coulomb's constant

1 Answers · Science & Mathematics · 17/09/2020

4. ### Physics II problem?

...potential is constant and so the field (which is the derivative of potential w/ r /t r ) is zero -- E = dV/dr = d(-ke*Q/ R )/dr = 0...

1 Answers · Science & Mathematics · 18/09/2020

5. ### When air expands adiabatically...?

Take the derivative of the given equation w/ r /t time: dP/dt * V^1.4 + P * 1.4*V^0.4 * dV/dt...

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

6. ### Physics Hollow Sphere problem?

...surface. and ε₀ = 8.85e-12 C²/N·m² A) At r = 0.021 m, the enclosed charge is Q = (4.10 - 2.50) mC...

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

7. ### pls help asap?

... 1) ΔL = 1.0e-5 * 20 * (-27 - 25) = 0.0104 m 2) Δ r = 17e-6 * 6.0m * 90K = 0.00918 m = 9.18 mm 3) using α = 24e-6, 0...

1 Answers · Science & Mathematics · 14/09/2020

8. ### A moving train travels through station P with a speed of 20 meters per second and accelerates uniformly for 2 seconds reaching a speed of ?

...-Vi)/2 = (48-20)/2 = 14 m/sec^2 accel. time ta = 2.0 sec retardation r = (0-48)/3 = -16 m/sec^2 retard. time tr = 3.0 sec distance computation : S1...

2 Answers · Science & Mathematics · 07/09/2020

9. ### A car at the Indianapolis 500 accelerates uniformly from the pit area, going from rest to 310 km/h in a semicir arc with a radius of 210m.?

...the speed is 310km/h = 86 m/s and the distance covered was d = π r = π*210m = 660 m and so from v² = u² + 2as we get (when initial speed...

2 Answers · Science & Mathematics · 24/08/2020

10. ### Find the lamp’s power output, assuming it radiates equally in all directions.?

... then the light spreads to the surface of a sphere.  Area = 4 pi() r ^2  and if, at the radius of 4.1m, the intensity on EACH square metre...

1 Answers · Science & Mathematics · 07/09/2020

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