An unstable particle is at rest and suddenly decays into two fragments. no external forces act on the particle or its fragments. one of the fragments has a speed of 0.56c and a mass of 6.68×10−27kg, while the other has a mass of 1.67×10−27kg.

what is the speed of the less massive fragment?

Because atoms of elements in the same group of thbecause atoms of elements in the same group of the periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t fe periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t f