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moment od inertia J = m/2*r^2 = 0.34*7.9^2/10^4 = 0.00212 kg*m^2 angular acceleration α1 = 2PI/60*n/t1 = 0.10472*1750/6.9 = 26.56 rad/sec^2 friction torque Tf = J*0.10472*n2/t2 = 0.00212*0.10472*1500/49 = 0.0068 N*m accelerating torque T1 = J*α1 +Tf = 0.00212*26.56 +0.0068 = 0...

1 Answers · Science & Mathematics · 23/11/2019

A) Φ = Bo L^2 (magnetic flux = magnetic field * area, where * = scalar product) B) Φ = B L^2 (as above) C) emf = - (B - Bo) / (t - to) = (Bo - B) / (t - to) (Faraday/Lenz law) D) I = emf...

1 Answers · Science & Mathematics · 30/08/2019

1/2 m v*2 = F d 1/2 (5.26E-3)(832^2) = F (0.0624) F = 29175 N or 2.92E4 N to 3 sig figs (anonymous forgot the 1/2 on the left) When you get a good response, please consider giving a best answer. This is the only reward...

2 Answers · Science & Mathematics · 11/01/2020

Young's modulus E = σ / ε = (F/A) / (ΔL/L) = FL / AΔL which rearranges to ΔL = FL / EA and so it comes down to what you take for the moduli of steel and copper...

1 Answers · Science & Mathematics · 11/09/2019

That's just under 5 ft, for Americans. That's short, but not abnormal. I know several people who are that height and lead perfectly normal lives. One of the most beautiful women I know is that height. The only problem is that she...

2 Answers · Health · 19/08/2019

The initial electric potential energy is U = kQq / d U = 8.99e9N·m²/C² * -8.50e-9C * -1.6e-19C / (0.325m) U = 3.76e-17 J and this gets converted into KE in the electron: KE = 3.76e-17 J...

1 Answers · Science & Mathematics · 09/02/2020

V = λ*f = 0.82*4 = 3.28 m/sec

2 Answers · Science & Mathematics · 05/02/2020

AC = 2. See below for explanation. Notice that there are two similar triangles, ABC and EBD. The area of EBD is twice that of ABC, since the trapezoid area is equal to that of triangle ABC. But, the square...

3 Answers · Science & Mathematics · 19/12/2019

Density .... Convert ounces to grams. Everyone knows that 1 milliliter is equivalent to 1 cubic centimeter. D = m / V D = (1.12 oz x 28.3495 g / 1 oz) / 3.54

**cm**³ = 8.97 g/**cm**³ The answer can only be...5 Answers · Science & Mathematics · 09/07/2019

moles ethanol = 1.50 g / 46.07 g/mol = 0.03256 mol PV = n RT P = nRT/V P = 0.03256 mol (0.08206 Latm/molK) (523 K) / 0.251 L P = 5.56 atm If you need pressure in a different unit, just use the R that...

1 Answers · Science & Mathematics · 10/02/2020