A researcher created a table to show the densities of several materials. According to the table, which materials have the same density? ОА.
steel and iron
ОВ.
iron and lead
O C. steel and copper
OD
aluminum and copper

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Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.