Acurrent of i=8.0a is flowing in a typical extension cord of length l=3.00m. the cord is made of copper wire with diameter d=1.5mm. the charge of the electron is e=1.6×10−19c. the mass of the electron is me=9.1×10−31kg. the resisitivity of copper is rho=1.7×10−8ω⋅m. the concentration of free electrons in copper is n=8.5×1028m−3.

find the drift velocity vd of the electrons in the wire

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

)consider two positively charged particles, one of charge q0 (particle 0) fixed at the origin, and another of charge q1 (particle 1) fixed on the y-axis at (0,d1,0). what is the net force f⃗ on particle 0 due to particle 1?