clearly explained please

1. [-/9.09 Points] DETAILS SERCP9 17.P.001.WI. MY NOTES ASK YOUR TEACHER PRACTIC A current of 85.2 mA exists in a metal wire. (a) How many electrons flow past a given cross section of the wire in 10.6 min? electrons (b) In what direction do the electrons travel with respect to the current? O opposite direction The magnitude is zero. O same direction 2. [-/9.09 Points] DETAILS SERCP9 17.P.003 SOLN MY NOTES ASK YOUR TEACHER PRACTICE In the Bohr model of the hydrogen atom, an electron to es at a speed of 6.08 x 104 m/'s in a circular path having a radius of 1.90 x 10"9 m. What is the effective current associated with this orbiting electron? MA 3. [-/9.09 Points] DETAILS SERCP9 17.P.004. MY NOTES ASK YOUR TEACHER PRACTICE A The current supplied by a battery in a portable device is typically 0, 154 A. Find the number of electrons passing through the device in four hours. electrons 4. [-/9.09 Points] DETAILS SERCP9 17.P.005. MY NOTES ASK YOUR TEACHER PRACTICE AND A certain laboratory experiment requires an aluminum wire of length of 37.D mi and a resistance of 3.80 12 at 20.0"C. What diameter wire must be used? (The resistivity of aluminum at 20,0 C is 2.82 x 10' n . m.) mm 5. [-/9,09 Points] DETAILS SERCP9 17.P.011. MY NOTES ASK YOUR TEACHER PRACTICE AND A person notices a mild shock if the current along a path through the thumb and index finger exceeds BZ WA. Compare the maximum possible voltage without shock across the thumb and index finger with a dry-skin resistance of 3.0 x 105 0 and a wet-skin resistance of 2000 03. dry skin wet skin