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1. ### Physics - Rotational Motion?

a) τ = r x F where τ, r and F are vectors and x represents...

1 Answers · Science & Mathematics · 22/04/2020

2. ### Physics equation manipulation question!?

Fg / r = GMm/r^3 Which is not particularly useful if you ask me, are you sure that's what you mean?

3 Answers · Science & Mathematics · 11/07/2019

3. ### What does the expression reduce to if we move so far away along the central axis that ?

For z >> R, E = qz / [4πε₀*(z²+R²)^(3/2)] ≈ qz / [4πε₀...

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

4. ### Can someone solve this physics question?

R = 37.2^2/9.80*sin 28.2 = 141.2*0.4726 = 66.73 m

2 Answers · Science & Mathematics · 13/08/2019

5. ### What is the wavelength of a photon that will excite an electron from n=3 to n=5 in a hydrogen atom?

change in energy = R(1/3² - 1/5²) = 1.55e-19 J and change in energy = hv / λ so λ = hv / change in energy = 6.626e−34J·s * 2.998e8m/s / 1.55e-19J λ = 1.282e-6 m = 1.282 µm = 1282 nm

2 Answers · Science & Mathematics · 14/06/2019

6. ### A top with radius 10cm, mass 2kg has a string around the edge and is initially at rest. . . .?

A/ torque τ = r x F = 0.10m * 10N = 1.0 N·m B/ For a solid cylinder...

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

7. ### For any patch element on the G-cylinder’s curved surface, what is the angle θ?

dA^ = r^ dh dφ E = k q r^ / r³ then the angle θ between the electric field vector E^ and the vector dA^ is null

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

8. ### Consider a particle of mass m = 18.0 kg revolving around an axis with angular speed ω.?

tangential velocity Vt = ω*r = 23*1.75 m/sec Ke = m/2*V^2 = 18/2*(23*1.75)^2 = 14,581 joule or J = m*r^2 = 18*49/16 KE = J/2*ω^2 = 9*49/16*23^2 = 14,581 joule

1 Answers · Science & Mathematics · 17/10/2019

9. ### Physics Gravitation Help?

For a particle, angular momentum = m*v*r which is conserved since no external torques are ...

1 Answers · Science & Mathematics · 29/02/2020

10. ### I would really really really appreciate any help!! You don't need to show all the work, an equation can even help!!?

Ipeak = Vr/R = 60/300 = 0,20 A Vℓ = X*I = ω*L*I = 200...

2 Answers · Science & Mathematics · 06/08/2019