Mechanical Properties of Metals

Often, materials are subject to an external force when they are used. Mechanical engineers calculate those forces, and material scientists determine how materials deform or break as a function of force, time, temperature, and other conditions. Materials scientists lear…

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Kepler’s Laws of Planetary Motion

Kepler's First Law (The Law of Ellipses): Each planet moves in an elliptical orbit, with the sun at one focus of the ellipse. This law is also known as the law of elliptical orbits and obviously gives the shape of the orbits of the planets around the sun. Kepler…

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Newton’s Laws of Motion

The problems of mechanics can be solved by Newton's laws of motion . The three laws proposed by Sir Isaac Newton are described as follows. Newton's First Law of Motion: Newton's first law of motion states that every object will remain at rest or in un…

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Comparison of Solids, Liquids and Gases

Comparison of solids, liquids and gases (fluids) can be made in aspects like macroscopic description, mobility of molecules, density, molecular spacing, the effect of shear stress, everyday stress, viscosity and compressibility below in the tabular form. S.No A…

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Airplane Parts and their Function

Airplanes are traveling machines manufactured to transport human beings and luggage from one location to another. Airplanes travel in the air significantly faster compared to roadway vehicles, trains and ships. Airplanes are manufactured in different shapes and sizes …

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What Lubricant to Select: Oil or Grease ?

The decision between selecting an oil or grease for lubrication can be made only after carefully considering several factors. When to lubricate with oil: Oil is generally preferable in systems that consistently operate at high temperatures (over 200°F). Oil is pre…

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Comparison Between Overhead Lines and Underground Cables

Even though electrical energy can be transmitted or distributed using overhead lines and underground cables, selecting one over the other is based on the reasons listed in the table below. Overhead Lines and Underground Cables   S.no Parameter Overhead lines …

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