Copper has a work function of 4.7 eV. If a sheet of copper metal is irradiated with green light at 555 nm will an electron be ejected? If so what is the kinetic energy (in eV)Im am stuck please help.
check for a bad ground:for example:loose ground battery cable,loose serpentine belt,loose ground connectio on the headlights end,or a bad alternator.
i have a 1998 Honda Civic and it does the same thing. Threes nothing to worry about and i wouldn't spend all that money for nothing. I think he just wants you to take it to him.
3×10? m/s for the speed of light in a vacuum c 6.626 ×10 ? ?? J-s for Planck's constant h 9.11×10 ? ?? Kg for the mass of an electron m k.e hυ - Φ [hc/λ] - 4.7 eV [6.626 ×10 ? ??(3×10?)/(555 x 10 ? ?)] - [4.7 x 1.6 x 10 ? ??] 10 ? ??[3.5816 - 7.52 ] a -tive answer hence an electron will not be ejected. [photons with wavelengths greater than the threshold wavelength λ? c/f? , where f? is the threshold frequency, do not have enough energy to eject an electron from the metal.] infact maximum wavelength for photons that will eject electrons from a copper surface: E hc/λ? λ? hc/E [6.626 ×10 ? ??(3×10?)/(4.7 x 1.6 x 10 ? ??)] 264.34 x 10 ? ? m 264 nm hope this helps
alternator see there are country differences here and ill use aud recon alternator recommended about 80 - 100 aud second hand from the wreckers about 15 to 30 bucks depends if you have to remove it or if they have one out and new ew ew ew ew ar about anywhere b tween 180 and 380 depending on the dealership
