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UExcel Physics: Introduction
UExcel Physics: Kinematics
UExcel Physics: Mechanics
UExcel Physics: Optics
UExcel Physics: Fluid Mechanics
UExcel Physics: Thermal Physics
UExcel Physics: Electricity Concepts
UExcel Physics: Magnetism
UExcel Physics: Universe
UExcel Physics: Atomic and Nuclear Physics
Free Online UExcel Physics Courses
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element. Every solid, liquid, gas, and plasma is made up of neutral or ionized atoms. Atoms are very small; typical sizes are around 100 pm (a ten-billionth of a meter, in the short scale).
Nuclear physics is the field of physics that studies atomic nuclei and their constituents and interactions.
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