When an electron is displaced in a semiconductor, the hole that's left behind is

a. attracted to the negative terminal of the voltage source.
b. incapable of carrying a charge.
c. attracted to the anode of the voltage source.
d. considered an impurity in the crystal.

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.

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius

Asailboat is traveling to the right when a gust of wind causes the boat to accelerate leftward at 2.5m/s2 for 4s. after the wind stops, the sailboat is traveling to the left with a velocity of 3.0m/s.assuming the acceleration from the wind is constant, what was the initial velocity of the sailboat before the gust of wind? answer using a coordinate system where rightward is positive.