Two identical piano wires have a fundamental frequency of 576 Hz when kept under the same tension. What fractional increase in the tension of one wire will lead to the occurrence of 5 beats/s when both wires oscillate simultaneously

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct