With a concave lens what is always true about the image? Select all that apply: It is always inverted

It is always a real image

It is alway bigger than the object

It is always a smaller than the object

It it always upright

It is always a virtual image

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.