What do you use a combination square for? A combination square is a multi-purpose measuring and marking tool used in metalworking, woodworking, and stonemasonry. It is composed of a rule and one or more interchangeable heads that can be attached to the rule. How do you square a combination square? Butt the square up against […]
Which transformer is used in power supply?
Which transformer is used in power supply? Transformers are most commonly used for increasing low AC voltages at high current (a step-up transformer) or decreasing high AC voltages at low current (a step-down transformer) in electric power applications, and for coupling the stages of signal-processing circuits. What are the 2 types of power supply? Two […]
How is photovoltaic energy produced?
How is photovoltaic energy produced? The conversion of sunlight into electrical energy by a solar cell is called the “photovoltaic effect”, hence why we refer to solar cells as “photovoltaic.” Solar PV cells generate electricity by absorbing sunlight and using that light energy to create an electrical current. Where is photovoltaic energy used? In the […]
What is detached shock wave?
What is detached shock wave? A bow shock, also called a detached shock or normal shock, is a curved propagating disturbance wave characterized by an abrupt, nearly discontinuous, change in pressure, temperature, and density. Then, the oblique shock transforms in a curved detached shock wave. What causes a shockwave? Shock waves are formed when a […]
How do you identify repeating units in polymers?
How do you identify repeating units in polymers? Since polymers are made by linking together many identical small molecules, there are repeating units in polymers. Here’s an example, polyvinyl chloride, in which the repeating unit is -CH2-CHCl-. In poly(vinyl chloride) the repeating unit comes directly from the end-to-end linking of many vinyl chloride molecules. How […]
What is the difference between a gas fluid and a liquid fluid?
What is the difference between a gas fluid and a liquid fluid? Liquids are incompressible liquids. There are fluids whose density does not change sharply with pressure. Gasses are also fluids, which form compressible fluids. They do flow as a result of the difference in friction between two points, but at the same time, they […]
What factor determines the type of fire extinguisher?
What factor determines the type of fire extinguisher? What would determine the type of fire extinguisher used would be the class of fire it is. Which situation indicates a small fire for which it may be appropriate to use a portable fire extinguisher? It is appropriate to use portable fire extinguisher when the room temperature […]
When polymers are melted and set into a Mould it is called?
When polymers are melted and set into a Mould it is called? Injection molding is a process in which a thermoplastic polymer is heated above its melting point, resulting in the conversion of the solid polymer to a molten fluid with a reasonably low viscosity. What is mold in injection molding? Injection moulding consists of […]
What is isotropic material?
What is isotropic material? Isotropic materials are materials whose properties remain the same when tested in different directions. Common isotropic materials include glass, plastics, and metals. On the other hand, fiber-reinforced materials such as composites and natural materials such as wood tend to display anisotropic properties. Is glass anisotropic? Glass and metals are examples of […]
What does a radar altimeter do?
What does a radar altimeter do? The radio altimeter sometimes referred to as a radar altimeter is designed to provide an accurate reference, in some cases within 2 feet, of the aircraft above the ground. In most cases in general and commercial aviation this device is operational up to 2,500 feet above ground level (AGL). […]