Composite Material

Composite is consist of two phase, one is Reinforcing phase and other is Matrix. Reinforcing phase is like fibers, particles, flakes. Matrix is a continuous phase. Example of composite: Concrete reinforced with steel, epoxy reinforced with fibers.

Naturally found : Bone-salt plates made of calcium and phosphate ions reinforcement soft collagen.
Some advanced composites are: graphite/epoxy, Kevlar/epoxy, fiber glass etc.

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Combined-Cycle Power Plant

Combine Power Plant use both Gas Turbine and Steam Turbine to produce energy. Natural gas use for gas turbine.The exhaust heat of gas turbine use in steam turbine. A schematic diagram are given below: Combined Cycle Generation Process

What is difference between plane angle and solid angle?

A plane angle is one that can be measured completely within a plane. This may be because the angle occurs in a 2-D space, or it is an angle that is contained completely within a plane that is in a 3-D (or higher-D) space. So the angles in a triangle are plane angles, because they are in a plane. Similarly, the angles in a spherical triangle are plane angles, because even though they measure things in a 3-D space, they can always be shown to be wholly within a plane. Another way to consider a plane angle is to think of angles within a circle. You can divide the circle up into 2π radians, for example, or 360°, or 400 gon, or whatever units you choose. However, the radian as a unit is defined by the subtended arc length that is equal to the radius of the circle. A steradian, the basic unit, is solid angle is one that is subtended by a portion of the surface area of a sphere that is equal to r^2, where r is the radius of the sphere. It can be considered to be a cone subtended at...

How Does a Refrigerator Work?

The refrigeration cycle is a normal process consist of, Compression, Condensation, Expansion,Evaporation .The process are given below: Refrigeration Cycle The compressor constricts the refrigerant vapor, raising its pressure, and pushes it into the coils on the outside of the refrigerator. When the hot gas in the coils meets the cooler air temperature of the kitchen , it becomes a liquid. Now in liquid form at high pressure, the refrigerant cools as it flows into the coils inside the freezer and the fridge. The refrigerant absorbs the heat inside the fridge, cooling down the air. Last, the refrigerant evaporates to a gas, then flows back to the compressor, where the cycle starts all over.

Mechanical Engineering

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