Material

used quite frequently in a variety of construction applications. Not only was the material found to be durable and versatile, it was also a very cost-effective solution, and so its use was quite prolific in the installation of insulation, floors, ceilings, etc. Today we know that asbestos poses a very serious health concern, and so it is no longer used in modern day construction applications. Unfortunately, this material continues to exist in many of older structures found all throughout…

IZOD Impact Test of Notched Polymer Introduction The IZOD impact test is a method used to determine the impact resistance of materials. The main objective of this experiment is to measure the impact strength of three specimens’ material by measuring the amount of the energy required to cause the material to fracture, using Avery Denison 6709 IZOD impact tester. Materials and Methods Apparatus: Three specimens with a machined 45° notch (V-Notch) at room temperature {Polycarbonate, Polyamide…

How to Prevent Cement Roof Tiles Surface from Deterioration? Roof cement tiles are durable materials that can be used for roofing, but just like other materials of its kind, they too are actually prone to deterioration. Over time, these tiles develop structural defects and these defects only show up many years after they are installed. The problem is, not all defects that develop in cement tiles can be rectified. That is why it is important to know how to prevent cement roof tiles from…

Knee Wraps: The Benefits and Drawbacks What are knee wraps? The knee wrap is similar to the wrist wrap regarding the logic that applies to both. Knee wraps are also to an “Ace” bandage, except that they are much thicker and stronger. The elastic material that is used to make the knee wrap is the same found in wrist wraps. The allowed width for knee wraps is 8 cm (3 inches), although they can sometimes be 2.0 meter, 2.5 meters or even 3.5 meters long. Advantages of using knee wraps The primary…

identification marks along with some text, identify the owner. Higher status smiths made the high-quality gold and silver seals, were often goldsmiths, while other smiths, such as tinsmiths, tended to make the seals that are more mass-produced from cheaper materials. Matrices were mass produced they were easy to make so that an owner would have several different seal matrices within his or her lifetime. A seal was created when the matrix was pressed down into sealing wax, which was made of…

The crystal size is also affected by the rate of cooling and larger crystals were shown to be formed when fat was cooled at a slower cooling rate83. However the samples were not subjected to changes in the rate of cooling in this study. At higher temperatures (or lower supercooling conditions) due to decrease in the driving force, less crystals are formed although the crystals are larger in size as compared to those formed at lower temperatures83. At lower temperatures, due to the higher driving…

Lead is a toxic metal that can enter the body by inhalation of lead dust or ingestion when touching the mouth with lead-contaminated hands. If leaked onto the ground, acid and lead particles contaminate the soil and become airborne when dry. Children and fetuses of pregnant women are most vulnerable to lead exposure because their bodies are developing. Excessive levels of lead can affect a child’s growth, cause brain damage, harm kidneys, impair hearing and induce behavioral problems. In adults,…

When getting ready to replace your home’s old fiberglass insulation in the attic, you’ll need to take the necessary steps to remove the old material. This is essentially if you are adding spray foam insulation, which will need to get into every crevice of the attic to form a good seal. These tips will help you remove the old fiberglass insulation. Tools & Materials Before you can get started, you will need to gather the following items. • Large contractor trash bags • Tape • Claw hammer •…

How many of us recycle? Unfortunately, the answer is simple: not nearly enough. There plenty of excuses why you don’t recycle. “It doesn't make a difference,” “It’s too hard to do,” or maybe even “They don’t pay me to do it.” But, are any of these reasons honestly justification not to do it? Recycle has immediate and long-term effects on our planet, all of which are good—how many can say that about not recycling? You don’t have to be a hippie to care about the planet or even to recycle. So, I…

in contact, and the normal force helps calculate kinetic friction. Static friction is the force which must be overcoming to originally start moving an object. Once the frictions are calculated, coefficients may be calculated as well. Equipment & Materials: -Spring Scale -Several Wooden Blocks (Around 3” x 12” x 3/4”) -Yarn or String -Push Pins or Thumb Tacks -Table or Desk Surface Procedure: For the first part of the procedure, a loop of yarn was attached to the end of a 12” block by using a…