A light of wavelength 352 nm with an intensity 2.00 W/m² is directed at a metallic surface. Only 0.60% of incident photons will produce photoelectrons. Calculate the number of photoelectrons emitted per second if the metallic surface has area of 2.00 cm². (a) 4.26x10 photoelectron/s (b) 7.09×10 photoelectron/s (c) 7.09×10 photoelectron/s (d) 4.26x10 photoelectron/s Two identical particles P and Q of rest mass m., are moving with velocities 812 and 19 in directions x and -x respectively in the lab frame. Calculate the energy of particle P in Q's rest frame. (a) (b) 19 13 (c) m,c² (d) m,c²