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  1. 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

  2. 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

  3. 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

  4. 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

  5. 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 cm³ = 8.97 g/cm³ The answer can only be...

    5 Answers · Science & Mathematics · 09/07/2019

  6. 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

  7. Iron resistivity ρi = 97.1*10^-3 ohm*mm^2/m R = ρi*ℓ/s = 97.1*10^-3*0.11/2.25 = 0.0047 ohm

    2 Answers · Science & Mathematics · 21/07/2019

  8. density µ = E² / ε₀ so E² = µ*ε₀ = 5500J/m³ / 8.85e-12 C²/N·m² = 6.2e14 N²/C² E = 2.5e7 N/C then E = σ / ε₀ = Q / Aε₀ Q = EA...

    1 Answers · Science & Mathematics · 01/02/2020

  9. I think we can use field E = λ / 2πrε₀ to find the linear charge density 20e3 N/C = λ / (2π*0.057m*8.85e-12 C²/N·m²) λ = 6.34e-8 C/m The rod has a cross-sectional area A = πr² = π(0.057m)² = 1.02e-2 m² and so the...

    1 Answers · Science & Mathematics · 17/01/2020

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