How far away was a lightning strike if thunder is heard 7.20 seconds after the flash is seen? (assume that sound traveled at 350.0m/s during the storm)

Does heating a metal wire increase or decrease its electrical resistance? why?

What is the difference between mass density and weight density?

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.