Engineering

Silica aerogel of ·1 g/cm3 starts at $8/g or 80¢/cm3. If you'd like densities toward the record of 1 mg/cm3, multiply by--I don't know--500? Carbon aerogels are somewhat cheaper, resorcinol formaldehyde cheaper still. You could make your own and maybe do better.

It seems a 3mg/cm3 aerogel costs $2100/g or $6·2/cm3.

The words are literal , a water tube boiler is water inside the tubes with hot gases surrounding them and a fire tube boiler are got gases within the tubes with water surrounding them.

The Mesopotamians There has always been a great debate as to who kicked off civilisation: was it the Egyptians, the Greeks or the Romans? Well, actually, none of them did. Human history began in the great alluvial plain between the Tigris and Euphrates rivers, with its rich and immensely fertile soil: a land known as Mesopotamia. The people that dwelled here eight thousand years ago had learned to irrigate the land with canals and ditches, and were keen farmers. From this came plenty, which relieved man of the need to fight for survival. The Assyrian, Babylonian and Sumerian civilisations flourished here in an area stretching from modern Turkey, to western Syria, and Iraq. But what did they do for us? For a start, they invented writing, with the oldest book, the epic of 'Gilgamesh', written around 4,500 years ago. They also gave us the first written laws - apparently to restrain 'drunkenness' in the population; a side effect of another of their innovations, beer. They invented brick, which they produced in millions to build the first cities and their 'Ziggurat' temples. In warfare they gave us the first professional army and invented the tank or siege engine, and it was here that the wheel was invented; and then the chariot in 4,000 BC. They observed the movement of the stars, and created the Zodiac, thereby being responsible for both astrology and astronomy. The list goes on - the reed boat and the sail, glass blowing... They even came up with the electric battery, although no one is quite sure what they did with it.

Depending on who you believe, the first hydroelectric generator was either at Niagara Falls in 1880 or at Appleton, Wisconsin in 1882. However, it is unclear whether either of these had a dam - they may have been simple waterwheels.

The uses of a junior hacksaw are to cut things and to mould the materials into different shapes and sizes.

An online review of suppliers of paraffin wax indicates a range of specific gravity for paraffin wax, from 0.82 to 0.96. The variation arises from the degree of refining - the less refined waxes a higher percentage of paraffin oil and are consequently lighter (have a lower SG). More highly refined paraffin wax has much lower retained oil ( approx. 0.5%), and are therefore much denser.

The phase shift is caused by inductance in the transformer. Any inductance from magnetic flux that fails to link both windings is called leakage flux, and the resulting inductance is called leakage inductance.

The correct spelling would be vernier callipers, or vernier calipers depending on which country you come from. They are used for measuring the inner distance between two surfaces. (e.g. if your tube material is 1 cm thick, and 5 cm across on the outside surface, the vernier calipers would show a distance of 3 cm.

can any one suggest some names of technical events....only event name....

If a rocket exerts a greater downward force than the force with which gravity pulls on, it will accelerate upwards.

To make our lives more automatic and easier, more futuristic.

subjects in engineering first year (cse) students are:-

1.basic civil engineering

2.basic mechanical engineering

3.engineering mechanics

4.engineering physics

5.mathematics (M1)

all these subjects are in engineering first year (first semester)

It is easy to grow hardwoods with proper understanding of their specie. They can be found almost everywhere. Hardwoods are fast growing trees as well. They tend to grow best in loamy soils, with a mixture of sand, silt and clay. Depending on their specie, they can grow in tropical forest or cold temperature countries.

An electrostatic precipitator (ESP) is a piece of equipment that uses high DC voltage to deposit a charge on precipitates passing through it, and a charge of opposite polarity on collector plates that attract and hold the precipitates. The whole process produces an outflow of air or gas that has far less particulate matter in it.

Devices like the ESP are used in different environments to clean air, and are also applied to clean the flue gases coming out of boilers to remove flyash.

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There are zero watts in 300 amps. Watts are the product of amps times volts.

Laser beams are used in modern communication systems to send signal over long distances through optical fibres.

They are also used to perform bloodless surgery.

Lasers can also be used as weapons to spoil control system of aeroplanes and make them to crash with the additional feature that the cannot be detected.

list down the advantages and the disadvantages of the micrometer screw gauge over vernier caliper

Many of the calculations done by a working ChE involve Thermodynamics, Physical Chemistry and Kinetics and Catalysis. It's not just adding and subtracting by any means. A firm background in Math is required.

I suggest that you find a copy of Perry's Chemical Engineering Handbook in the library, and thumb through it. You will get an feel for some of the work done.

It is a form of 316 Stainless Steel

As to the designation -

C (first letter) means the service it is intended to be used in this case - corrosion resistant service ,

F(second letter) -The second letter indicates the approximate location of the alloy on the iron-chromium-nickel (FeCrNi) ternary diagram. For users familiar with the diagram, the second letter does provide an indication of the nominal iron, nickel, and chromium content, but most people would have to obtain alloying information from a material specification.

8M - the third and fourth digits represent the maximum permitted carbon content in units of 0.01% (e.g., CF8M has a maximum of 0.08% carbon)

The D-code on a CNC is used for the tool diameter offset number. This number is programmed in to CNC and basically tells it where the tip of a specific cutting tool is located.

i dont know why do you need to have this answer anyway