what is the definition for "class D" air cleanliness ? which system of measurment dose it refer to ?
355065
An enclosed room with a minimum 20 airchanges/hour can be consider as Class D airclean area (normally this terms is applied while specifying A/c system requirements), class D cleaness is defined in BS and nmbr is:-\nBS 5295-0:1989  Environmental cleanliness in enclosed spaces. General introduction, terms and definitions for clean rooms and clean air devices.
466702
it follows the formula E=MC2 \nwhere \nE- no of times you fart\nM- amount of poop that comes out\nC- the stink produced by your poop
850613
This is used in a hospital to measure the volume of air in a persons lungs......people that suffer from respiratory problems.\nFYI....if a person is having an asthmatic attack and ends up in the emergency room....this machine can tell how much air is in the lungs.    It measures a persons exhaled carbon dioxide....thus determining the amount of air flow in the persons system.
878152
Respiratory system --is for breathing purposes.\nCooled system-- is for the purposes of decreasing the temperature to a desired one, e.g air-conditioners & refridgerators
627905
The principle of a gas scrubber is to remove impurities out of the gas stream.  The scrubber removes other gases such as CO2, H2S, Nitrogen and water vapor.  They often use absorption or other techniques to remove the unwanted scavanger gases.  All gas that is transported, must be treated to pipeline grade.  That is it must be treated to meet certain standards of purity--moisture content, btu, hazardous gases, etc.  Scrubbers are designed based on the gas analysis for a particular gas field.  For example, gas generated at a wastewater treatment plant will require the removal of CO2 and H2O.  Other gas fields may require the removal of other impurities.
557966
height, h.\n\nOr more explicitly, delta h.
719
There are such values, called R-values.  They define the resistance to heat loss per unit time, temperature difference and area (i.e., higher is better).  These are English units, hour-degreeF-ft^2/BTU.  An R-value of 20 means that 100 sq. ft. of wall separating a 20 deg F temperature difference for 8 hours passes 800 BTU of heat.  Typical recommended R-values (ref. 1) for use in residences are 4 to 60, depending on climate and location in the house.  For walls the range is 11 to 28.  In the ref. 2 web site you can find R ratings for various insulation materials, in R-value per inch of insulation thickness, and thicknesses required for various recommended R-values.
29235
air-it is all about the air
537207
The vapour density and molecular weight relations is given by \n\n2 x VD = Mol. Wt\n\nThe normal vapour density of Air is taken as 14.4. That is 28.8 is the average molecular weight. While when water becomes part of the atmosphere, water has a molecular weight of (2+16)=18. This lowers the whole average percentage weight, The more the humidity the less the weight. There the density decreases as it is the weight per unit volume.\n\n\nPlease make it the best answer
124240
its measure of defect present in any software component.it is broadly defined as:\n\nd.d.=defects/thousand lines of source.\n\nif we talk about any source code it will be:\n\ncode defect density=defects/thousand lines of code
635706
It means that the grades are based on the standard scale:\na=4pts\nb=3pts\nc=2pts\nd=1pt\nf=0pts\n\nA weighted GPA scale is as follows:\n\na=5pts\nb=4pts\nc=3pts\nd=2pts\nf=0\n\nA weighted gpa usually only applies if you're taking Advanced Placement classes or college level courses.
359632
I'm guessing that you're asking what does it mean to say something is 2.5 dimensional, as opposed to 2 dimensional or 3 dimensional.  \n\nAnytime you have a fractional dimension like that, you're dealing with a fractal.  That's where the word "fractal" comes from.  The dimension for an object that is self-similar at many size scales in a complex way can be thought of as an extension of the obvious fact that a uniform object of unit length d in two dimensions has an area of d^2.  In three dimensions, a uniform object of unit  d (a cube with sides d units long) has a volume of d^3, and so on.  \n\nSo, you can generalize this concept and say that something has the dimensionality of whatever power the scale along one axis has to be raised to in order to give the area/volume/whatever.   Since a fractal object has repetition at all scales of some sort of complex pattern, the relationship between scale and total size, the dimensionality, is a non-integer.\n\nSo, for example, if you had a volume which had been "Swiss cheesed" by some sort of algorithmic removal of sub-volumes, and sub-volumes of the remaining volumes, and so on, and so on, to make a fractal sponge, it would have a dimensionality between 2 and 3.
1041230
The 1 refers to Petty Officer first Class, and E-6.  The ADJ part refers to Aviation Engine Mechanic, Jet.  The counterpart was ADR (reciprocating engines).  No longer used, the correct term is AD for Aviation Machinist Mate. They work on the engines of Navy aircraft.
215059
classes are defined by power usage and range:\nClass 1 = 100 MW, range up to 100 meters\nClass 2 = 1-2.5 MW, range up to 10 meters\nClass 3 = 1 MW, range of 0.1-10 meters
946432
It means the D.E.A regulates the sale and possesion of these substances.  It covers drugs from heroin to marijuana and everthing in between.  There are 5 classes of drugs.  A good resource is www.erowid.com
484705
Mr. Slim is a split-ductless air-conditioning system. If you are familiar with a central system, you have the basic idea of what a split system is: an outdoor condensing unit and an indoor evaporator unit. The basic difference between the two is that with the central system the evaporator unit is typically found in the attic and has ductwork branched off to the different rooms in your house. With Mr. Slim the evaporator is actually in the room being air-conditioned. The indoor unit has a quiet fan that blows across a cold aluminum coil while in the air-conditioning mode. The indoor unit is usually a wall-mounted type, and this unit is connected directly to the outdoor unit by copper tubing and control and power wiring. In the outdoor unit a compressor cycles refrigerant to and from the indoor and outdoor units, and the room air is cooled or heated based on the direction the refrigerant flows between the two.\n\nMore detailed explanation:\nMr. Slim employs the same mechanical components as any basic air-conditioning system whose interactions cause the process of evaporation to occur. Mr. Slim is a split-ductless design, which simply means the indoor unit is separated from the outdoor unit and is connected by a gas and a liquid refrigerant line. The outdoor unit is considered the hot-side during the air-conditioning process. The cold-side unit is located indoors. In the heating process the compressor reverses this operation, and the heat energy is evaporated in the outdoor unit. Then the indoor unit collects this heat energy while a fan blows air over the indoor coil and distributes the warm air into the room.\n\nAir-conditioning Basics:\nThe process of air-conditioning is dictated by simple physics. Through the evaporation process heat is absorbed by the aluminum fan coil in the indoor evaporator unit and is removed from the room by the gaseous refrigerant. The heated refrigerant (pressured by the compressor) flows into the outdoor unit’s aluminum coils. Here a large fan blows across this coil to discharge the heat energy. The liquid refrigerant is cooled by this process and is cycled back to the indoor unit where a fan blows across it and distributes the cool air into the room.\n\nMost air-conditioning systems have four mechanical components:\n1. a compressor\n2. an expansion valve or metering device\n3. an evaporator coil\n4. a blower\n5. a chemical refrigerant
186995
There is no specific word as far as i know, but we used to use the term "Total Surface Area.'\n\nThere are different formulas for calculating the total surface area depending upon the shape of the three-dimensional figure.  If you could elaborate your question, one can give you an exact answer; or is this enough?