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a) τ =

**r**x F where τ,**r**and F are vectors and x represents...1 Answers · Science & Mathematics · 22/04/2020

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

For z >>

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

**R**= 37.2^2/9.80*sin 28.2 = 141.2*0.4726 = 66.73 m2 Answers · Science & Mathematics · 13/08/2019

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 nm2 Answers · Science & Mathematics · 14/06/2019

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

dA^ =

**r**^ dh dφ E = k q**r**^ / r³ then the angle θ between the electric field vector E^ and the vector dA^ is null1 Answers · Science & Mathematics · 12/09/2019

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 joule1 Answers · Science & Mathematics · 17/10/2019

For a particle, angular momentum = m*v*

**r**which is conserved since no external torques are ...1 Answers · Science & Mathematics · 29/02/2020

Ipeak = Vr/

**R**= 60/300 = 0,20 A Vℓ = X*I = ω*L*I = 200...2 Answers · Science & Mathematics · 06/08/2019