if a giant molecular cloud is 59 pc in diameter and. shock wave sweeps through at 25 km/s how long will it take the shock wave in years to sweep through the cloud​

When a lead acid car battery is recharged by the alternator, it acts essentially as an electrolytic cell in which solid lead(ii) sulfate is reduced to lead at the cathode and oxidized to solid lead(ii) oxide at the anode. suppose a current of is fed into a car battery for seconds. calculate the mass of lead deposited on the cathode of the battery.