What is true about an iceberg and the water surrounding the iceberg?
a. they are in thermal equilibrium.
b. the water has a lower temperature than the iceberg.
c. the iceberg has a lower temperature than the water.
d. their temperatures are not the same but you can't tell which is greater without a thermometer.

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.