Two oppositely travelling beams of electrons, each having a total energy of 0.851667 MeV and 0.63875 MeV as observed in the lab. What are their respective velocities, momenta, and kinetic energies? What is the relative speed of an electron in the inertial reference system another electron?

Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?

Ineed extreme for task 2. my student number is 571721. many to whoever solves this correctly, im in debt to you.

The 20@kg wheel has a radius of gyration about its center g of kg = 300 mm. when it is subjected to a couple moment of m = 50 n # m, it rolls without slipping. determine the angular velocity of the wheel after its mass center g has traveled through a distance of sg = 20 m, starting from rest.