[填空题]
How much kinetic energy will an elec//n-:et.dplbg sp e740zq xhf 6a jo6s6wp+fstron gain (in joules and eV) if it( pewlz-h 0j 4ez4 y4us)xfi+j accelerates throuz+wx0hy4 eiluje()f 4-jz4ps gh a potential difference of 23,000 V in a TV picture tube?
$ \times10^{-15 }\,J$
eV