Ture/False? 1) Earth's core is mostly made up of iron and magnesium.
2) Scientists think that movements in the liquid inner core create Earth's magnetic field.

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

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.

Acircular ring of charge with radius b has total charge q uniformly distributed around it. what is the magnitude of the electric field at the center of the ring? 0 keq/b2 keq2/b2 keq2/b none of these answers