Momentum of the electron to momentum of the photon

Reference no: EM1322447

Q1. A disc of mass M and radius R is rolling purely without slipping with velocity V on a flat horizontal floor. When it hits a step in the floor of height R/2.what is the velocity of the center of mass of the disc just after impact.

Q2. A piece of moon rock reads 3.800 N on a scale when in air, but 2.156 N in a fluid having a density of 790 kg/m^3. What is the density of te moon rock in kg/m^3?

A) An electron has the same energy as a photon of blue light (400 nm). What is the momentum of the electron?

B) What is the ratio of the momentum of the electron to momentum of the photon?

Reference no: EM1322447

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