Dry ice and liquid nitrogen smoke machines both create a heavy low lying fog effect. The materials they use to create this are often difficult and expensive to get hold of for most people, hard to store, and the effect can now be easily created on demand by new electronic water based versions. Disney theme parks tend to use nitrogen foggers as the cost of liquid nitrogen is less in bulk than special effect fog fluids.

Compared to water ice, dry-ice offers a far greater cooling capacity. It also maintains a higher degree of efficient cooling for many hours after water ice has lost its cooling function and simply melted away. In cases where it is imperative to use water ice, dry-ice can also be used to prolong the life of the water ice. While you will have water as a residue after water ice has melted, dry-ice leaves no residue whatsoever. See similar questions...

Oil based is the dinosaur and has a proven track record. However, the finish ambers with time, requires a lot more drying time and emits a strong vapor, that is not only unhealthy but contributes to the depletion of the earths ozone. Rumor has it that soon, all solvent based finishes will be non-compliant with the states V.O.C. Laws making them illegal to use. Water based or commonly called latex has evolved into an excellent alternative. See similar questions...

Alkyd, or oil-based paint penetrates wood better than latex (water-based) paint and won't stick when you keep your doors and windows shut for the winter. For the bulk of most jobs, latex (water-based) paint is the better choice. It dries faster, doesn't yellow and can be cleaned up with soap and water when you break for the day. See similar questions...

Oil-based or "oil-modified" urethane floor finish is a traditional mineral spirits-based polyurethane finish. There are many finishes of this type approved by the MFMA for application on gymnasium floors. Oil-modified finishes are generally amber in color, high gloss with good gloss retention, and they take approximately 12 to 24 hours to dry between coats. They are relatively inexpensive and durable. They typically amber (yellow) with age. See similar questions...

Dry ice is solid carbon dioxide with a freezing point of -78°C (-109°F). It is extensively used for package deliveries of frozen dairy products such as ice cream. It is cut into pieces of appropriate size, which are wrapped in paper to avoid rapid evaporation and then placed around the package of the ice cream inside an insulated packer or in a single service type packer. See similar questions...

Nitrogen is a pure element, just as oxygen, gold and mercury are all pure elements. Because it boils at -1960 Celsius, pure nitrogen occurs as a gas which makes up 78% of the atmosphere. Even the coldest day ever recorded on Earth was too hot for liquid nitrogen to exist naturally! As a gas it is clear, odourless and harmless. In its liquid state, it is clear and non-toxic but dangerous because it is extremely cold and because it the gas boiled off expands rapidly. See similar questions...

Coconut oil is liquid above 75 degrees F. (25 C.), and below that it will be a solid fat. It can be stored in either form, and it can be liquefied easily by applying low level heat. See similar questions...

One pearson can easily roll any of the machines around the plant floor without any special equipment. See similar questions...

Filtration is just the beginning with a purification process. There are real limits to what filtrations can remove from water. When reverse osmosis purification is the goal, filtrations are used to prepare the water for purification. Pre-filtrations remove the contaminants indicated in the filtration section below. Purification by reverse osmosis is designed to remove all dissolved solids including but not limited to unseen viruses, bacteria, and salts. See similar questions...

Grace Tri-Flex 30 synthetic roofing underlayment is a premium water-shedding underlayment. Grace Tri-Flex 30 is not designed to protect against standing water or water moving upslope resulting from factors such as accumulated snow, ice, wind-driven rain, or debris. For protection from standing water or water moving upslope, it is recommended that Grace Ice & Water Shield self-adhered underlayment be used. See similar questions...

leaks caused by ice dams in all climates, clearly surpassing many of the minimum standards of performance set by ASTM (American Society for Testing and Materials), ICBO (International Conference of Building Officials) and SBCCI (Southern Building Code Congress International). Although Grace Ice & Water Shield is recognized as the premium underlayment on the market today, some homes do not demand such high performance. See similar questions...

There is indeed a story behind this, undoubtedly Deep Purple's most well-known song. The lyrics actually tell the story of the recording of Machine Head. Deep Purple were originally all set to record the album at the Casino in Montreux, Switzerland. They were just awaiting a Frank Zappa and the Mothers of Invention concert to be held before the recording could begin. But the Casino burnt down during the concert, after some stupid person had fired a flare into the Casino's ceiling. See similar questions...

Well failure and aquifer failure are the two reasons why water wells go dry. A water well fails when it no longer transmits water from the aquifer to the pump intake. In West Virginia, this is usually caused by corrosion and scale and occasionally by algae, bacteria, or improper well development. aquifer fails when the water table falls below the bottom of the well. See similar questions...

Not all evaporators (or crystallizers) give the same result (icemaking capacity). The main obstacle is called “Heat Impedance” (HI), which means “impeding the transfer of heat from one element or ingredient to another”. In the case of ice machines it means “from the (warmer) cooling liquid (like seawater) to the (colder) refrigerant”. The design of the first generation crystallizers creates a heat transfer coefficient from 700 to 1,400 W/(m2. See similar questions...

The dry flocculants are made in a bead or powder form. They come in 50-pound bags or very large bags. The dry flocculants are white in color and look like "Dry Laundry Detergent". These flocculants are 99% active and need to be properly mixed with water to become active. It is best to mix them to a 1/4% solution to a 1/10 of 1% solution. In other words, a flocculant system would mix up about 6 pounds of the dry flocculant into a 300-gallon container of water. See similar questions...

Dry ice fog hugs the ground, dissipating relatively quickly. Chemical fog floats and disperses in the air, taking a longer time to dissipate. See similar questions...