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Mechanical Engineering
Mechanical Engineering is a branch of engineering that encompasses the generation and application of heat and mechanical power and the design, production, and use of machines and tools. Mechanical engineering involves application of the principles of dynamics, control, thermodynamics and heat transfer, fluid mechanics, strength of materials, materials science, electronics, and mathematics.
10,989 Questions
A metal which has pp in its name?
The only metal I can think of with "pp" in it's name would be copper.
How does a spring pulley system work?
A spring pulley system works by using a spring to provide tension on the pulley system. When a force is applied to the system, the spring stretches, storing potential energy. This potential energy is then released, helping to move the load connected to the pulley. The spring tension assists in lifting or lowering the load with less effort.
Aircraft alloy is a term used to describe alloys typically used in the aerospace industry. They include steel, and Titanium but are most commonly Aluminum Alloys.
An alloy is a mixture of different metals to incorporate beneficial properties of each/all).
Aircraft Alloys are made / chosen based on there high strength-to-weight ratio, corrosion resistance, thermal properties, etc.
Hope this Helps. I'm sure you can find more by 'googling' Aircraft Alloy or Aerospace Alloy
Information about silk route and improving communication routes in the regions of altitude?
The Silk Road (from German: Seidenstraße) or Silk Route is a modern term referring to a historical network of interlinking trade routes across the Afro-Eurasian landmass that connected East, South, and Western Asia with the Mediterranean and European world, as well as parts of North and East Africa. Extending 4,000 miles (6,500 km), the Silk Road gets its name from the lucrative Chinese silk trade along it, which began during the Han Dynasty (206 BC - 220 AD). The central Asian sections of the trade routes were expanded around 114 BC by the Han dynasty,[1][not in citation given] largely through the missions and explorations of Zhang Qian,[2] but earlier trade routes across the continents already existed.
Trade on the Silk Road was a significant factor in the development of the civilizations of China, the Indian subcontinent, Persia, Europeand Arabia. Though silk was certainly the major trade item from China, many other goods were traded, and various technologies, religions and philosophies, as well as the bubonic plague (the "Black Death"), also traveled along the Silk Routes.
The main traders during Antiquity were the Indian and Bactrian traders, then from the 5th to the 8th century the Sogdian traders, then afterward the Arab and Persian traders.
… In the 1st - 3rd centuries AD the Silk Road connected the four most powerful ancient empires - European Roman Empire, the Parthian Empire in the Near and Middle East, the Kushan Empire in the south of Central Asia, Afghanistan and Chinese Hang Empire in the Far East. Although they struggled for the domination over the key points of trade, it was possible for all of them to provide caravan routes stability.
International trade intensified. China received from Central Asia woolen fabrics, carpets, jewelry, lazurites and thoroughbred horses, and exported silk fabrics, iron, nickel, furs, teas, paper, and gunpowder. India exported spices and fragrances. Via Iran Rome imported Chinese silk which was worth its weight in gold there. Via Khoresm caravans went to Eastern Europe.
The main road passed through Dunhuan, Khami, Turfan, Kashgar, Uzgen, Osh, Khiva, Andizhan, Kokand, Samarkand, Bukhara and Merv. In Merv (now Mary in Turkmenistan) the Silk Road split. One branch went via Khoresm to Volga, to Eastern Europe. That made it possible to deliver goods China, India, Central Asia to Russia: Kiev, Novgorod, and later -Moscow. Another branch went via Balkh and the lands of modern Afghanistan to India. The third went to Bagdad and further to the Mediterranean Sea. There the goods were loaded on ships and delivered to Egypt, Byzantium, and Italy.
However, the political situation changed. Only Byzantium left from the Roman Empire, the Parthian Empire was replaced by the state of Sassanids, the Kushan and Hang empires broke up into a number of states conflicting with each other. The break in the functioning of the Silk Road lasted until the 6th century when new strong regional powers started to appear in Eurasia. s the world is becoming advanced so the facellities and communication level of silk route is also improving .new things trains veichle and satlliets are used i it
What is a hard quartz rock that sparks when struck against steel or iron rock salt?
The hard quartz rock that sparks when struck against steel or iron is likely flint. Flint is a type of quartz that is known for producing sparks when struck against a harder material, making it an important tool for creating fire in early human history. Rock salt is a different mineral altogether and does not exhibit the same sparking properties as flint.
Is there any rigidity modulus for fluids?
for an isotropic media you can divide the force on every element in two components.
-bulk component
-rigid component
now bulk component is associated with bulk modulus and other is associated with modulus of rigidity(written as meu).
now bulk component is the one which causes the matter to get compressed and the rigid component only changes the shape of the volume. now, water do not get compressed, it is incompressible and that's why the the force on it is affected by only the rigid component. thats why the modulus of rigidity is zero.
How do you convert kpa to cfm?
kpa = kilopascals is a measure of pressure.
cfm = cubic feet per minte is a measure of the rate of flow.
The two measure different things and, according to the basic rules of dimensional analysis, conversion from one to the other is not valid.
A roller support is a type of structural support that allows for movement and rotation of a structure. It typically consists of a cylindrical roller that is placed under a beam or structure to enable it to move horizontally due to expansion, contraction, or other factors, while still providing vertical support.
What is thermal conductivity of brass a?
The thermal conductivity of brass is around 109-130 W/mK, depending on the specific composition of the brass alloy. Brass is a good conductor of heat, making it useful in applications where heat transfer is important.
How does an electric kettle know to switch off when the water is boiling?
First, a 'Bi-metallic Strip' consisting of two different metals, having different 'Coefficients of Expansion', fused together in a two-layer strip which is connected electrically to the kettle element power supply.
It is placed in a chamber, generally in the kettle handle, where steam from the top of the kettle can come into contact with the chamber holding the metal strip. (Not with the strip itself).
When at room temp., the electrical contacts are closed allowing current to flow to the Element when power is switched on.
When the kettle boils, steam is passed around the chamber that contains the strip, causing it to heat up.
The metal having the higher 'C of E' of the two making up the bi-metal strip, will expand more than the other, causing the strip to bend and open the contacts, thus shutting off the power.
Are alloys genrally weaker of stronger the pure metals?
Alloys are generally stronger than pure metals because they combine the beneficial properties of different metals to create a material with enhanced mechanical and physical properties. The mixing of metals in an alloy can improve characteristics such as strength, hardness, and corrosion resistance, making them more desirable for many applications.
To calculate the mass lifted, first calculate the work done using the formula Work = Power x Time. In this case, Work = 294 W x 10 s = 2940 J. Then, use the formula for work done against gravity, which is Work = Force x Distance. Substitute the values 2940 J for Work, 2 m for Distance, and 9.81 m/s^2 for acceleration due to gravity to find the Force (Weight). Finally, use the formula Weight = mass x gravity, where gravity is 9.81 m/s^2, to determine the mass lifted.
Definition of least count of screw gauge?
The least count of a screw gauge is the smallest measurement that can be read or determined using the instrument. It is essentially the smallest change in the position of the thimble that can be detected, which corresponds to the smallest change in the measured dimension.
How many kilowatts are there in 30000 btu?
This is a power unit conversion from British thermal units per hour (Btu/hr.) to its equivalent in horsepower (hp). There are 2544.43 btu/hr. in one horsepower. Conversely, there are 0.000393 hp in one Btu/hr.
What is the difference between pig iron and steel?
Pig iron is the initial form of iron produced during the smelting of iron ore, containing high carbon content and impurities. Steel is an alloy of iron that contains less carbon and is produced by further refining pig iron to remove impurities and control the carbon content, resulting in a more malleable and versatile material.
Yes, alloys are generally tough and strong because they are a combination of two or more metals. The unique combination of different metals in an alloy can enhance properties like hardness, strength, and durability, making them suitable for a wide range of applications.
What the difference between low alloy steels and high alloy steels?
The difference in classification of low alloy and high alloy steels is based on the metal composition: low alloy steels include a lower concentration of alloying metals versus high alloy steels. The composition affects properties like strength, ductility, etc.
A car can be considered a shell structure, as the body of the car is designed to provide structural support and protection to the occupants. The body panels of the car generally act as a shell, distributing external forces across the frame to ensure structural integrity and safety.
How do you make a forcemeter out of household objects?
You can make a simple forcemeter using a spring scale, rubber bands, a wooden stick, and a hook. Attach the hook to the spring scale, then use rubber bands to connect the hook to the wooden stick. Apply force to the stick, and the spring scale will measure the force exerted.
Is post heating required for carbon steel material above 19.05mm thickness?
Post heating is generally recommended for carbon steel material above 19.05mm thickness to reduce the risk of cracking during welding and to promote better mechanical properties. The specific post-heating requirements may vary based on the material and welding process being used. It is best to consult the specific welding procedure specifications to determine the exact post-heating requirements for the application.
What does the term base or parent metal in an alloy mean?
The term "base metal" or "parent metal" in an alloy refers to the primary metal that forms the majority of the alloy's composition. It serves as the foundation of the alloy, with other elements added to enhance its properties. The base metal determines the alloy's primary characteristics and properties.
Which metal was often confused with lead and tin?
Zinc was often confused with lead and tin due to their similar appearances. However, zinc has a higher melting point than lead and tin, and it does not oxidize easily like lead and tin.
What is the difference between shielded and unshielded welding?
Shielded welding uses a shielding gas to protect the weld pool from contamination and oxidation, while unshielded welding does not use such gas and is typically done in a protected atmosphere like underwater or in a vacuum. Shielded welding produces cleaner and stronger welds due to the protection from atmospheric elements.
Type of thermodynamic properties?
Thermodynamic properties are specific volume, density, pressure, and temperature. Other properties are constant pressure, constant volume specific heats, Gibbs free energy, specific internal energy and enthalpy, and entropy.
