Mechanical Engineering

Poisson's ratio is the negative ratio of how compression affects distortion. When an object is compressed in one direction it expands in two directions perpendicular to the direction of compression. The ratio is equal to d(transverse strain)/d(axial strain).

Enthalpy is the amount of energy in a system and when this changes (when a reaction happens), the energy is either released (exothermic) or absorbed (endothermic) and this energy is usually released or absorbed as heat. Therefore when the enthalpy decreases, heat is released from the system making it exothermic. In contrast, when the enthalpy increases, heat is absorbed making it endothermic.

There are several ways. The easiest is to find a chart, like in the related link, which gives a weight per unit length of a specific cross section beam. With a weight per unit length, multiply this by the length in question, and you have the weight. In the related chart, your length would have the units of meters. The other way is to calculate the cross sectional area of the beam. Then multiply the cross sectional area by the length in question, which will give you the beam volume. Then multiply the volume by the density of the material, which will give you the weight.

· Cost effective and more economical than electrical chillers. Use heat for compression while vapour compression chillers use mechanical compressor for compression purposes which consume a lot of electrical energy.

· Since the compression is caused by heat and does not include any moving mechanical parts, it is less noisy and vibration free.

· For a facility that demands high system reliability, the lower electricity demands of the absorption chiller will reduce emergency generator load requirements.

· Good for the environment as it eliminates the requirement of using CFC and HCFC refrigerants used in electrical chillers which have high global warming potential and instead use natural refrigerants such as water.

That refers to something that moves around in a circle.

Acronym meaning: Rolled Homogeneous Armour. It's primary application is for armored vehicles for the military. The military specification for RHA is MIL-A 12560. The updated version is MIL-A 46100.

By thick control.

1. The working gas is compressed in compressor and directed towards the heat exchanger (Air heater), where heat is being added to the compressed gas before it enters the turbine.

2. The heat is supplied by an external source such as a nuclear reactor, or some other heat source.

3. The hot gasses then expend and accelerate through a nozzle which drive the guide vanes of the turbine and then shaft.

4. At last, the remaining exhaust gasses pass through a cooler and directed towards the compressor inlet.

The material will yield when stress reaches a critical value.

Stress = Load / Area

Thick steel wire is stronger than thin steel wire because there is more cross sectional area in the thick wire. Although the material's strength in load per unit area would be the same, the ultimate load that the wire can sustain would be more in the thick wire. A simple way of looking at it is to imagine a thick wire as a number of thin wires stuck together. If a thin wire can support a mass of 1kg then 2 thin wires can support 2kg. A wire which is twice as thick (twice the cross sectional area) can also support 2kg.

Young's Modulus (modulus of elasticity) describes the stress-strain behavior of a material under monotonic loading. The dynamic modulus of elasticity describes the same behavior under cyclic or vibratory loading.

Ideally speaking Axles are meant for balancing/transferring Bending moment and Shafts are meant for Balancing/transferring Torque.But,they can be used interchangeably also.We can have a shaft which also transmits Torque as well as Balances bending moment and in the same way an axle can also function as shaft.Such machine elements which function as axle as well as shaft are called Axleshafts.Axleshafts are designed while taking care of the acting Bending Moment as well as Torque. Ideally speaking Axles are meant for balancing/transferring Bending moment and Shafts are meant for Balancing/transferring Torque.But,they can be used interchangeably also.We can have a shaft which also transmits Torque as well as Balances bending moment and in the same way an axle can also function as shaft.Such machine elements which function as axle as well as shaft are called Axleshafts.Axleshafts are designed while taking care of the acting Bending Moment as well as Torque.

There are four main methods to Control Corrosion:

# select a corrosion resistant material or alloy # apply a coating of painting to the object to be protected # used a cathodic protection system # use corrosion inhibitors There are four main methods to Control Corrosion:

# select a corrosion resistant material or alloy # apply a coating of painting to the object to be protected # used a cathodic protection system # use corrosion inhibitors

First, you should probably write a question about what you want to know. I have an idea. Maybe you could buy a few fish and study them (eating habits, growing, etc.), then write out a poster telling the results of your question.

Equivalent to ASTM A36

RPM stands for Revolutions Per Minute so, in short, RPM is the number of revolutions that the generator shaft turns in one minute.

It seems obvious that the question is really trying to understand RPM vs frequency in Hertz. To understand this, you need to know the number of poles in the rotating and/or stationary magnetic field. In a two pole generator, for instance, an RPM of 1800, or 30 RPS (Revolutions Per Second), yields 60 Hertz power. In a eight pole generator, for instance, an RPM of 450, or 7.5 RPS, yields 60 Hertz power. The equation is simple...

FHertz = SRPM / 60 * PNumber of Poles

nothing, its just terminology why

A pressure relief valve is a safety device to prevent over pressure in such things as compressor receivers. A pressure reducing valve drops the pressure to the requirements of the user or tool. Such as a demand valve on scuba gear.

Coefficient of Linear thermal expansion (CLTE) = Alpha

Alpha=(change in length)/(original length*change in temp)

=Meters/(meters*Celsius)

=m/mC (meters cancel leaving...)

=1/C

=C^-1

Hydraulic systems are either gravity feed systems or pressurized systems. In a gravity feed system the pressure is produced as a result of an elevated tank holding the motive fluid, returns are pumped back to the tank from a collector tank at the bottom of the system. In a pressurized system a hydraulic positive displacement pump pumps the fluid into the system pressurizing it. Relief valves will dump excess pressure back to the holding tank.

They are essentially the same machine. Capstan is British usage, Turret, US. One old and still technically correct usage of Capstan was the (Turnstile winch) were Bars were extended and seamen walked round and round to weigh the anchor. Almost certainly this inspired the lathe term, as this is a maritime country (UK). The Wheel or circular component on a capstan lathe, however is usually three spoked and Vertical and drives the ram ( containing the usually hexagonal turret- 6 tools) back and forth into the work. They are or were very popular in the automotive sector for fabricating standard parts.

They certainly are. Using them together with carburetted engines can be a bit tricky, and usually the compression has to be lowered when compared to a naturally aspirated engine.

5.67g/cm3

The above answer appears to be an error. The density would be more like 0.5g/cc or 0.0005kg/cc or 500kg/m^3.

In other words, if the composite is 10mm thick, it would weigh about 5kg/m^2.

Europe Norms

The primary advantages of so-called high speed steels is in their ability to withstand heat created from the friction of a fast moving cutting tools such as drill bits or saw blades. They are formulated with specific alloys which make them heat resistant and more wear resistant than regular high carbon steels.