3. A particle at rest takes 2.20 x 10-6 s to decay. Relative to the laboratory's frame of reference in which it moves, the particle decays in 4.40 x 10-6 s. Determine the speed of the particle

4. A high-speed muon travels 5110 m in its lifetime, as measured by an observer on Earth.In the muon's reference frame, that distance measures 662 m. Calculate the speed of themuon.

6. A photoelectric effect experiment uses calcium (work function W = 2.87 eV)

(a) What is the lowest photon energy, in Joules, that can cause emission of electronsby means of the photoelectric effect?

(b) Determine the threshold frequency.

(c) Later, incident blue light of wavelength 450 nm is used in the experiment.Determine whether any electrons are emitted. If they are emitted, determine theirmaximum kinetic energy.