Determine the quantity of work done when a crane lifts a 100-n block from 2m above the ground to 6m above the ground

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

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.