# Yahoo Web Search

1. Sort by

1. ### If an Aircraft fly at an altitude of 30,000 feet what is air pressure and air density in {kg\m-3}, air temperature in (k).?

...m, 9.1 km pressure is about 30 kPa Temp is about 230 K density is about 0.46 kg/m³"{kg\m-3}" is meaningless...

3 Answers · Science & Mathematics · 02/11/2019

2. ### help in spring question physics?

...force = Static frictional force kx = μ(s)N kx = μ(s)mg x = μ(s)mg/k x = 0.60*1.5*9.8/(1.2 x 10³) x = 0.00735 m or 7.35 mm The block...

2 Answers · Science & Mathematics · 20/10/2019

3. ### Derivative Question?

L = Lo*(1+k*ΔT) L = 120*(1+17*10^-6*(24-21)) = 120.006 mm lenght increases by 6 μm

1 Answers · Science & Mathematics · 20/10/2019

4. ### 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

5. ### Physics question regarding capacitors?

a. field E = σ / ε where ε = k*ε₀ so σ = Eε = 1.5e6N/C * 5*8.85e-12 C²...

1 Answers · Science & Mathematics · 13/10/2019

6. ### An 10000 kg freight car rests against a spring bumper at the end of a railroad track.?

...8200/18200)^2 this goes into the spring. 1/2 kx^2 = 1/2 m v^2 x^2 = m v^2 /k x = sqrt( m v^2 / k) = sqrt( 18200*(8.3 * 8200/18200)^2 / (3.2 * 10 ^ 5) ) = 0.89 m...

2 Answers · Science & Mathematics · 11/10/2019

7. ### Physics: Springs: A block of mass 1.4 kg is attached to a horizontal spring that has a force constant 1100 N/m as shown in the figure...?

...dv/dx = -kx + 4.2 we want the point where dv/dx = 0, which is where x = 4.2 / k = 4.2 / 1100 = 0.0038 m = 0.38 cm ½mv² = 0.22 - ½...

1 Answers · Science & Mathematics · 18/10/2019

8. ### thermodynamics?

... = 8.314 J/mol·K So you can compute the temperature change in K (which is the same as the temperature change in ºC, since for CHANGES...

1 Answers · Science & Mathematics · 24/09/2019

9. ### line of charge of electric fields?

...x / √(x²+y²) So, for Ey I get dEy = k*λ*dx*y / (x²+y²)^(3/2) so Ey = k*λ*y ∫ dx / (x²...

3 Answers · Science & Mathematics · 23/09/2019

10. ### Physis Tension Question?

... / A₂Y₂ for nylon ₁ + and copper ₂ 1m * 5e-5/K * -20K + 1m * 1.6e-5/K * -20K = F₁*1m / (π/4)(0.005m...

1 Answers · Science & Mathematics · 21/09/2019