1. Two blocks of mass 0.1 kg and 0.2 kg approach each other on a frictionless
surface at velocities of 0.4 and 1 m/s respectively. If the blocks collide and remain
together, calculate their joint velocity after the collision.
2. A cyclotron produces a 100-μA beam of 15-MeV deuterons. If the cyclotron
were 100% efficient in converting electrical energy into kinetic energy of the
deuterons, what is the minimum required power input, (in kilowatts)?
3. In a certain 25-W mercury-vapor ultraviolet lamp, 0.1% of the electric energy input
appears as UV radiation of wavelength 2537 AËš . What is the UV photon emission
rate per second from this lamp?
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