Oxides Oxide is every substance formed by oxygen and another element. They form binary compounds, that is, they have only two elements in their chemical formula. Examples: Na 2 O, MgO, Al 2 O 3, FeO. magnetite water rocks Oxides are identified as binary compounds, with oxygen being the most electronegative element on the right side of the formula.
Shadow and Penumbra 1. A 1.9 m tall person is standing next to a building. The shadow of the building projected by sunlight is 90 m while the shadow of the person is 9 m. How tall is the building? We begin the problem by thinking about the sun's rays, since they must be parallel to each other. The person, shadow, and ray of light form a right-angled triangle just like the triangle formed by the building, shadow, and ray of light; the angles formed must be the same.
Each table in the table provides data for a chemical element: symbol, atomic mass, atomic number, element name, electrons in the layers, and whether the element is radioactive. Horizontal rows are called periods. In them, the chemical elements are arranged in ascending order of their atomic numbers.
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Also known as accelerated movement, it consists of a movement where there is variation of speed, that is, the furniture undergoes acceleration as time goes by. But if this speed variation is always equal at equal time intervals, then we say that this is a Evenly Varied Motion (also called a Evenly Accelerated Motion), that is, it has constant, nonzero acceleration.
From the dawn of humanity, man has tried to understand nature, its destiny, and the usefulness of everything in it. The Greeks were the first to come up with a concrete theory on this subject that so interested the great thinkers of the time. Today, physics, or natural philosophy as it was called, is in everyone's interest and is present in just about everything around us.