... few. The can is filled with the product to be sprayed and the propellant, a compressed gas such as butane or Freon. The gas is partly liquefied by the pressure in the can, but there is a layer of free gas above the liquid. As the can empties liquefied gas vaporizes to fill the space. The valve is normal held shut by the pressure in the can, and by the coil spring directly below the valve stem. When the push button is pressed, it forces the valve stem down in its housing, uncovering a small a small hole which leads up through the stem to the nozzle in the button. This allows the product to be forced up the dip tube ...

... the wages of college graduates are up. Of the fastest growing technical jobs, software engineering tops the list. Carnegie Mellon University reports, "recruitment of its software engineering students is up this year by over 20%." All engineering jobs are paying well; proving that highly skilled labor is what employers want! "There is clear evidence that the supply of workers in the [unskilled labor] categories already exceeds the demand for their services," says L. Mishel, Research Director of Welfare Reform Network. In view of these facts, I wonder if these trends are good or bad for society. "The danger of the i ...

... forms (insomnia, fatigue, anxiety, stress, vague aches and pains, etc.) is the most common complaint heard in doctors’ offices. There are three primary forms of depression. Major depression, like the flu, has a beginning, middle, and an end. Major depression often lasts for months. Left untreated, it tends to reoccur. Each reoccurrence tends to last longer and is more debilitating than the one before. Chronic depression is a low grade, long-term depression that can go on for years. Some people have had it most of their lives. Long term, low-grade depression is also known as dysthymia. Dys, meaning d ...

... a major modernization of its huge Fort Worth plant, which had originally been built during World War II. The F-16 Fighting Falcon, when it first came out, was designed to be in the Air Forces lightweight fighter (LWF) program. The first F-16 was developed as a YF-16 prototype back in 1972. It made it’s first official flight on February 2, 1974. A level speed of Mach 2 at 40,000 ft was attained on March 11, 1974. The production F-16A differed from the YF-16 in having a 13-inch fuselage extension to hold more fuel and the Westinghouse APG-66 radar. The wing area was increased by 20 square feet and an ad ...

... The whole process of the formation of is there are several potential reactions that can affect the oxidation of sulfur in the atmosphere, everyone with a different success. The second possibility is the reaction of sulfur dioxide with the atmosphere. Here are a few equations: 1. (2So2+O2 2So3 2) So3++120 H 2So4 The second reaction takes place very quickly. Therefore, the making of So3 in the damp atmosphere is assumed to be the lead to the formation of sulfuric acid. Phase two: the aqueous phase, sulfur dioxide occurs as three species. [S {iv}] [So2{aq}]+[+1S03-] +[So32-] This process occurs b ...

... However, many producers have a vision that twinning can be more than a once in a blue moon occurrence. These producers see twinning as a way to dramatically increase their yield per calving season. Producers will increase their income due to more weight per year per cow. It is necessary ;however, that the producer be well educated on how to handle twinning, in order for it to be successful for them. Many agencies see twinning as an economic move upward. The American Breeder Service has made efforts to produce semen as well as embryos with high predicted breeding values available to producers. They have been r ...

... specimen open and expose the insides. 4) we used a bit of water to wash the formaldehyde, alcohol solution from the specimen 5) we used tweezers to pull the mouth parts and head from the specimen. 6) we used a light so that we could see all the internal parts to the grasshopper clearly. I found this to be a very educational experience not just for me but for my whole group, I know this because I could see them concentrate and do everything right instead of just screwing off and not concentrating at all. I never knew that a grasshopper had so many complex parts to it. The jaw alone amazed me. I must ...

... the kangaroo, often referred to as the "Boomer" or "Old Man" in Australia. The Gray Kangaroo, the most well known species average weight is 145 pounds and from nose to tip of the tail is 10 feet long. The tail alone is about 4 feet long. The kangaroo has a small head with large ears and a small mouth. The fur is soft and woolly and some can have stripes on them. The kangaroo's body is specially built for jumping. It has two long, powerful hind legs with four toes on each. The front legs are short and have five toes with claws. These paws are used to handle food. Most of it's weight it in the hind legs and ta ...

... or two subspecies. There are several different characteristics between the two subspecies of orangutans and it has recently been suggested that they may be a separate species. The Borneo male has relatively large cheek pads, a tremendous laryngeal sac and a square shaped face. The Sumatran male has small pads and laryngeal sac, a ginger coloured moustache, a pronounced beard, and a diamond shaped face. Individuals can also be distinguished chromosomally, biochemically, and by their cranial characteristics. There is a great deal of individual variety in the orangutan. "Each orang-utan had a distinct ...

... Y chromosomes. "What we're trying to decide now is whether to isolate probes for the other chromosomes, or whether we should utilize the eight we have," he says. Dr. Willard is currently negotiating with an American company to develop prenatal diagnostic tests, which, because the current tests are time consuming and technically difficult to do, are restricted to women over 35 and those who have a family history of chromosomal abnormalities. Prenatal tests using Willard's probes would be much simpler and faster to perform and could be available to all pregnant women who wish to take advantage of the technology. ...