2. A spaceship moving at velocity 0.7c with respect to the earth launches a rocket moving in...
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2. A spaceship moving at velocity 0.7c with respect to the earth launches a rocket moving in the same direction at a speed of 0.5c with respect to the spaceship. How fast is the rocket moving with respect to the earth?
3. A radioactive uranium nucleus (mass 238.0508 amu) can decay to a thorium nucleus (mass 234.0436 amu) and an alpha particle (mass 4.0026 amu) where an amu (atomic mass unit) is equal to 1.661 x 10-27kg. What is the total kinetic energy of the particles produced in the decay?
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