Renewable resources need to be conserved because a) we are using them faster than they are replenished by nature

b)they are slowly disappearing from the Earth

c) if we overuse them nature will stop replacing them

d) all of these

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.