The elementary particle called a muon is unstable and decays in about 2.20μs , as observed in its rest frame, into an electron, a neutrino, and an antineutrino. What lifetime Δt do you observe for muons approaching you at 0.883 the speed of light?

Unpolarized light whose intensity is 1.19 w/ is incident on a polarizer. (a) what is the intensity of the light leaving the polarizer? (b) if the analyzer is set at an angle of = 41.0∘ with respect to the polarizer, what is the intensity of the light that reaches the photocell?

When does your body conduct current more readily?

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.