• Mechanical Engineering..... Help?

    if you have good knowledge and commend in subject then only you can get job not with marks and 4years degree
    if you have good knowledge and commend in subject then only you can get job not with marks and 4years degree
    5 answers · Engineering · 8 years ago
  • Can a man ride on a light ? how?

    name your bike as light and ride on it
    name your bike as light and ride on it
    7 answers · Physics · 8 years ago
  • Softwares related to Civil engineering.?

    civil engineer can use software package (ex autocad) but he cannot program the software
    civil engineer can use software package (ex autocad) but he cannot program the software
    3 answers · Engineering · 8 years ago
  • Which are the different materials used for roller element bearings?

    There are essentially two choices for the material used in ball bearings – chrome steel or stainless steel. Since the material plays a major part in the performance of a bearing in any given application, it is very important that the correct material is used. Note that the specified material applies to the load bearing components only – the rings... show more
    There are essentially two choices for the material used in ball bearings – chrome steel or stainless steel. Since the material plays a major part in the performance of a bearing in any given application, it is very important that the correct material is used. Note that the specified material applies to the load bearing components only – the rings and the balls. The retainer and the shields (if used) are usually made from a different material and are subject to separate specification CHROME STEEL (AISI 52100 OR EQUIVALENT) This is the standard material used for ball bearing applications where load capacity is the main consideration. The machinability of this steel is excellent, giving smooth, low noise raceway finishes, together with superior life. Chrome steel material is recommended in applications where corrosion is not a factor. CHEMICAL COMPOSITION (%): C CARBON Si SILICON Mn MANGANESE P PHOSPHOROUS S SULPHUR Cr CHROMIUM Mo MOLYBDENUM .95 – 1.1 .15 – .35 Max .5 Max .025 Max .025 1.3 – 1.6 - Hardness: 60 – 64 Rockwell C STAINLESS STEEL 400 series martensitic stainless steel is the standard material for miniature and instrument ball bearings where corrosion resistance is more important than load capacity. There are 3 types of 400 series stainless steel used in the bearings described in this handbook. These materials have evolved in response to different manufacturing and application needs. It is important to note that the actual material used is generally determined by the manufacturer, and cannot be specified by the user. The bearing part numbering system gives the appropriate codes for each material type. DR Stainless steel This material is used in the manufacture of most corrosion-resistant bearings. It has been specifically developed to give excellent lifetime and low noise characteristics, combined with superior corrosion-resistance. CHEMICAL COMPOSITION (%): C CARBON Si SILICON Mn MANGANESE P PHOSPHOROUS S SULPHUR Cr CHROMIUM Mo MOLYBDENUM .6 – .7 Max 1.0 Max 1.0 Max .03 Max .01 12 – 13.5 Max .25 Hardness: 58 – 60 Rockwell C AISI 440C STAINLESS STEEL The use of 440C material has declined in favor of other, more modern stainless steel formulations. However, it is still widely available and has very high resistance to corrosion. CHEMICAL COMPOSITION (%): C CARBON Si SILICON Mn MANGANESE P PHOSPHOROUS S SULPHUR Cr CHROMIUM Mo MOLYBDENUM .95 – 1.2 Max 1.0 Max 1.0 Max .04 Max .03 16 – 18 Max .75 Hardness: 58 – 60 Rockwell C ES1 STAINLESS STEEL This is a relatively new stainless steel formulation with excellent machinability that allows raceway finish characteristics approaching those of chrome steel, combined with a corrosion-resistance at least the equal of AISI 440C. CHEMICAL COMPOSITION (%): C CARBON Si SILICON Mn MANGANESE P PHOSPHOROUS S SULPHUR Cr CHROMIUM Mo MOLYBDENUM .44 – 46 .2 – .4 .2 – .4 Max .03 Max .01 12.8 – 13.2 Max .25 Hardness: 58 – 60 Rockwell C
    2 answers · Engineering · 8 years ago
  • Mechanical Engineering..can anybody suggest topic for seminar?

    take your subject which you have strong knowledge
    take your subject which you have strong knowledge
    3 answers · Engineering · 8 years ago
  • What is semiconductor ?

    A semiconductor is a material that has an electrical conductivity due to electron flow (as opposed to ionic conductivity) which is intermediate in magnitude between that of a conductor and an insulator. This means a conductivity roughly in the range of 103 to 10−8 siemens per centimeter. Semiconductor materials are the foundation of modern... show more
    A semiconductor is a material that has an electrical conductivity due to electron flow (as opposed to ionic conductivity) which is intermediate in magnitude between that of a conductor and an insulator. This means a conductivity roughly in the range of 103 to 10−8 siemens per centimeter. Semiconductor materials are the foundation of modern electronics, including radio, computers, telephones, and many other devices. Such devices include transistor, solar cells, many kinds of diodes including the light-emitting diode, the silicon controlled rectifier, and digital and analog integrated circuits. Similarly, semiconductor solar photovoltaic panels directly convert light energy into electrical energy. In a metallic conductor, current is carried by the flow of electrons. In semiconductors, current is often schematized as being carried either by the flow of electrons or by the flow of positively charged "holes" in the electron structure of the material. Actually, however, in both cases only electron movements are involved. Common semiconducting materials are crystalline solids but amorphous and liquid semiconductors are known. These include hydrogenated amorphous silicon and mixtures of arsenic, selenium and tellurium in a variety of proportions. Such compounds share with better known semiconductors intermediate conductivity and a rapid variation of conductivity with temperature, as well as occasional negative resistance. Such disordered materials lack the rigid crystalline structure of conventional semiconductors such as silicon and are generally used in thin film structures, which are less demanding for as concerns the electronic quality of the material and thus are relatively insensitive to impurities and radiation damage. Organic semiconductors, that is, organic materials with properties resembling conventional semiconductors, are also known. Silicon is used to create most semiconductors commercially. Dozens of other materials are used, including germanium, gallium arsenide, and silicon carbide. A pure semiconductor is often called an “intrinsic” semiconductor. The electronic properties and the conductivity of a semiconductor can be changed in a controlled manner by adding very small quantities of other elements, called “dopants”, to the intrinsic material. In crystalline silicon typically this is achieved by adding impurities of boron or phosphorus to the melt and then allowing the melt to solidify into the crystal. This process is called "doping"
    6 answers · Physics · 8 years ago
  • Explain newtons third law?

    Newton's Third Law A force is a push or a pull upon an object that results from its interaction with another object. Forces result from interactions! As discussed in Lesson 2, some forces result from contact interactions (normal, frictional, tensional, and applied forces are examples of contact forces) and other forces are the result of... show more
    Newton's Third Law A force is a push or a pull upon an object that results from its interaction with another object. Forces result from interactions! As discussed in Lesson 2, some forces result from contact interactions (normal, frictional, tensional, and applied forces are examples of contact forces) and other forces are the result of action-at-a-distance interactions (gravitational, electrical, and magnetic forces). According to Newton, whenever objects A and B interact with each other, they exert forces upon each other. When you sit in your chair, your body exerts a downward force on the chair and the chair exerts an upward force on your body. There are two forces resulting from this interaction - a force on the chair and a force on your body. These two forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. A variety of action-reaction force pairs are evident in nature. Consider the propulsion of a fish through the water. A fish uses its fins to push water backwards. But a push on the water will only serve to accelerate the water. Since forces result from mutual interactions, the water must also be pushing the fish forwards, propelling the fish through the water. The size of the force on the water equals the size of the force on the fish; the direction of the force on the water (backwards) is opposite the direction of the force on the fish (forwards). For every action, there is an equal (in size) and opposite (in direction) reaction force. Action-reaction force pairs make it possible for fish to swim. Consider the flying motion of birds. A bird flies by use of its wings. The wings of a bird push air downwards. Since forces result from mutual interactions, the air must also be pushing the bird upwards. The size of the force on the air equals the size of the force on the bird; the direction of the force on the air (downwards) is opposite the direction of the force on the bird (upwards). For every action, there is an equal (in size) and opposite (in direction) reaction. Action-reaction force pairs make it possible for birds to fly. Consider the motion of a car on the way to school. A car is equipped with wheels that spin in a clockwise direction. As the wheels spin clockwise, they grip the road and push the road backwards. Since forces result from mutual interactions, the road must also be pushing the wheels forward. The size of the force on the road equals the size of the force on the wheels (or car); the direction of the force on the road (backwards) is opposite the direction of the force on the wheels (forwards). For every action, there is an equal (in size) and opposite (in direction) reaction. Action-reaction force pairs make it possible for cars to move along a roadway surface.
    10 answers · Physics · 8 years ago
  • How do graduate engineers get jobs with no experience?

    it,s depend on your knowledge
    it,s depend on your knowledge
    6 answers · Engineering · 8 years ago
  • What's the difference between nano science and nano-engineering?

    Best answer: nano science deals with nano things, nano-engineering is a part of nano science
    Best answer: nano science deals with nano things, nano-engineering is a part of nano science
    3 answers · Physics · 8 years ago
  • Why does the FIFA World Cup specifically have to be every four years?

    World cop is a major event lot of money need to conduct. this much time must need also Gap between Olympics and world cop is two years
    World cop is a major event lot of money need to conduct. this much time must need also Gap between Olympics and world cop is two years
    7 answers · 2010 FIFA World Cup(TM) · 9 years ago
  • I came to India for travel. I want extension of visa. How to get it?

    Best answer: Contact your country embassy in India and inform them and show the resins why you are staying in India They give the extension if they satisfied
    Best answer: Contact your country embassy in India and inform them and show the resins why you are staying in India They give the extension if they satisfied
    1 answer · Immigration · 9 years ago
  • What do u think ........which team will win the FIFA CUP.???

    Germany or Brazil
    Germany or Brazil
    12 answers · 2010 FIFA World Cup(TM) · 9 years ago
  • I got 60 marks in eamcet and ipe marks are 842 then i got how much rank?

    Best answer: This is first time in the considering inter marks so no one have a clear idea about this
    Best answer: This is first time in the considering inter marks so no one have a clear idea about this
    2 answers · Mathematics · 9 years ago
  • Is time machine(time travel) a possible one?

    no it,s jest imagination of huma
    no it,s jest imagination of huma
    8 answers · Physics · 8 years ago
  • Why the water of Ganga is pure?

    pure miens not filtered water pure miens pavitra (holey water) and running water is always pure
    pure miens not filtered water pure miens pavitra (holey water) and running water is always pure
    11 answers · Geography · 8 years ago
  • Can i change mechanical engineering branch to electronics in k.j.somaiya?

    NO you have to join again in first year
    NO you have to join again in first year
    2 answers · Engineering · 8 years ago
  • I have a Lancer car, its power steering are rounding like Hard, when i turn the car so its round hardly...?

    change the car and bey a new car which can have your fev qualities
    change the car and bey a new car which can have your fev qualities
    3 answers · Engineering · 8 years ago
  • Which is best? Computer Engineering(CS) or Information Science(IS) Engineering?

    knowledge base IS is good
    knowledge base IS is good
    4 answers · Engineering · 8 years ago
  • How to build a robot?

    you need at least mechanical, electrical, computer programmer to build a robot
    you need at least mechanical, electrical, computer programmer to build a robot
    4 answers · Engineering · 8 years ago