Apion of mass m traveling at speed v decays into a muon of mass m μ and neutrino with approximately no mass. if the neutrino emerges at 90° with respect to the original direction of pion, at what angle θ does the muon come off with respect to the original direction of pion? re-niang-wherer.房 hint: you should get the expression ta nθ where y =

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?

1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light

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