Ahot-water radiator has a surface temperatue of 80 o c and a surface area of 2 m2 . treating it as a blackbody, find the net rate at which it will radiate energy to a 20 o c room (see problem in 1.36)

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.