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According to the World Health Organization (WHO ) , the industrial limit of sound in industries must be 75 dB (Decibels).
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Sounds travel faster through solids than through both gases and liquids. Solids have a more rigid structure , allowing sound waves to propagate more efficiently and at a faster speed. Here's a comparison of sound speeds in different materials: Solids (e.g., steel): up to 5,960 m/s (13,140 ft/s) Liquids (e.g., water): up to 1,482 m/s (4,862 ft/s) Gases (e.g., air): approximately 343 m/s (1,125 ft/s)
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Sound travels through a physical medium , such as air, water, or solid objects. It is transmitted through the vibration of particles in the medium.
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A compound machine is a machine that is made up of two or more simple machines. A bicycle, a crane, wheel borrow and scissors are examples of compound machines because they are made up of multiple simple machines , such as: Wheels and axles (simple machine: wheel) Pedals and levers (simple machine: lever) Gears and pulleys (simple machine: pulley) Inclined planes (simple machine: inclined plane)
Explanation
A compound machine is a machine that is made up of two or more simple machines. A bicycle, a crane, wheel borrow and scissors are examples of compound machines because they are made up of multiple simple machines , such as: Wheels and axles (simple machine: wheel) Pedals and levers (simple machine: lever) Gears and pulleys (simple machine: pulley) Inclined planes (simple machine: inclined plane)
Explanation
A screw is a simple machine that is an inclined plane wrapped around a cylinder. It is used to fasten objects together , and it is used in: Fastening parts together Holding things in place Providing a secure grip Examples include: Wood screws (used in woodworking and construction) Machine screws (used in machinery and equipment) Self-tapping screws (used in plastic and metal) Bolts (used in heavy-duty applications) Lag screws (used in heavy construction) Deck screws (used in decking and outdoor construction) Drywall screws (used in drywall installation) Anchor screws (used in concrete and masonry)
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An inclined plane is a slanting surface connecting a lower level to a higher level. It is a simple machine that helps to lift or move loads to a higher position, and is commonly used in : Ramps Staircases Slides Ski lifts Hilly roads
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An inclined plane is a slanting surface connecting a lower level to a higher level. It is a simple machine that helps to lift or move loads to a higher position, and is commonly used in : Ramps Staircases Slides Ski lifts Hilly roads
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A wheel with a rod, called an axle, through its center lifts or moves loads. Example : Screw driver, handle is wheel and its shaft is axle, a car wheel. The wheel and axle simple machine is used in many applications , such as: Transportation (cars, bicycles, etc.) Lifting heavy loads (cranes, winches, etc.) Moving objects (wheelbarrows, shopping carts, etc.)
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A wedge is an object with at least one slanting side ending in a sharp edge, which is used to cut or split material apart. Examples : Axes, knives, chisels, plough nall, s harpener, iron nails and pins (push pin).