Question: 1. Violet light of wavelength 410 nm ejects electrons with a maximum kinetic energy of 0.81 eV from a certain metal. What is the work

1. Violet light of wavelength 410 nm ejects electrons with a maximum kinetic energy of 0.81 eV from a certain metal. What is the work function of electrons to this metal, in electron volts?

2. Suppose a 0.39 kg billiard ball has a wavelength of 7.7 cm. This wavelength is big enough so that the ball can interfere with other billiard balls. What is the velocity, in meters per second, of the billard ball?

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