A negatively charged pion , whose mass is
273 times the mass of electron moves in a circular
orbit around a proton. It is a pi-mesie hydrogen atom.
How many revolutions will the pion make during its
lifetime of 10's in the ground state of the atom?
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Cells are the basic building blocks of all living things. ... Cells also contain the body's hereditary material and can make copies of themselves. Cells have many parts, each with a different function. Some of these parts, called organelles, are specialized structures that perform certain tasks within the cell.
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