Plastics and Polymers

They both have similar capabilities, but the main difference is that Lithium Polymer batteries can be shaped/molded in ways that Lithium Ion batteries simply can't.

Lithium Polymer batteries are used in lots of hobby equipment, very small devices, and anywhere else where a certain shape of battery is required.

It is difficult to determine which shop sells the most plastic bags as data on sales of plastic bags by individual shops is typically not publicly available. However, larger retail chains and supermarkets are known to sell large quantities of plastic bags due to the high volume of customers they serve.

Typically, plastic bags are cheaper to produce than paper sacks due to lower material and manufacturing costs. However, paper sacks are considered more environmentally friendly and biodegradable compared to plastic bags, which contribute to plastic waste and pollution. The cost difference may vary depending on factors such as size, design, and quantities ordered.

Light switches are typically made of plastic because it is a lightweight, durable, and cost-effective material that is also non-conductive, making it safe to use in electrical applications. Plastic is also easy to mold into various shapes and sizes, allowing for different switch designs to suit different needs and styles.

Polyurethane formulations cover an extremely wide range of stiffness, hardness, and densities. These materials include: * Low-density flexible foam used in upholstery and bedding * Low-density rigid foam used for thermal insulation and RTM cores * Soft solid elastomers used for gel pads and print rollers * Hard solid plastics used as electronic instrument bezels and structural parts Polyurethanes are widely used in high resiliency flexible foam seating, rigid foam insulation panels, microcellular foam seals and gaskets, durable elastomeric wheels and tires, automotive suspension bushings, electrical potting compounds, high performance adhesives and sealants, Spandex fibers, seals, gaskets, carpet underlay, and hard plastic parts. source: http://en.wikipedia.org/wiki/Polyurethane

No! Polypeptides are polymers of amino acids, joined by peptide bonds. They are the constituents of proteins. Starch, glycogen and cellulose are polysaccharides, which are polymers of simple sugars (monosaccharides) linked by glycosidic bonds. Polysaccharides are therefore carbohydrates. See http://www.phschool.com/science/biology_place/biocoach/bioprop/classes.html

Lipids are unlike the other macromolecules in that they do not have monomers per se. They are made up of glycerol and fatty acids, but it's not like DNA which is made up of nucleotides or proteins that are made up of amino acids. However, they are still considered macromolecules as lipids are a large category of important molecules in the human body.

Plastic itself is not inherently antibacterial. However, some plastics can be engineered or treated with antibacterial agents to inhibit the growth of bacteria on their surface.

A condensation reaction involves the loss of a small molecule like water or alcohol. If a molecule has only one functional group available for reaction, there is no additional site for the loss of a molecule, which is necessary to form a polymer chain. Hence, a molecule with only one functional group cannot undergo condensation polymerization to form a polymer.

All the polymer can not be made electrically conductive unless there are sufficient charge carriers available within the polymer itself. These charge carriers are responsible for conduction of electrical current. There is hardly a difference between a conducting polymer and conjugated polymer. The conjugated polymers have alternate single and double bond. Moreover, all conjugated polymers are conducting polymers. Their conductivity is increased on adding a suitable impurity in order to make free charge carriers.

Plastic can be engraved by a number of ways. If you're looking to do it yourself, then a steady hand and a dremel tool will work, but if you're looking for a more professional result with intricate details then you may want to look at either a laser engraver or a rotary engraver. A laser engraver can engrave any plastic that does not contain PVC (it is toxic when it goes under the laser), but a laser engraver can provide find details that the rotary engraver can not. A rotary engraver can engrave just about any plastic but may be limited to the amount of detail required in the engraving.

A polyethylene bag with a high-density structure is typically the least porous plastic bag option. These bags are less permeable to air, water, and other gases compared to low-density polyethylene bags, making them a more ideal choice for packaging items that require minimal exposure to outside elements.

Polymer: DNA, Monomer: nucleotides Polymer: Proteins, Monomer: amino acids Polymer: Polysaccharides, Monomer: monosaccharides

A plastic shank is a support structure or piece used in the construction of certain types of footwear, like shoes or boots. It is typically inserted between the insole and outsole to provide rigidity and support to the shoe, especially in the arch area. Plastic shanks help improve the stability and structure of the shoe, making them more comfortable to wear.

Plastic wrap will melt or possibly catch fire if placed in an oven, as it is not safe for high temperatures. This can release harmful chemicals and fumes into the air, and is a fire hazard. It is best to avoid putting plastic wrap in the oven.

The tendency of a polymer to crystallize decreases with increasing molecular weight because as

the chains become longer it is more difficult for all regions along adjacent chains to align so as to produce

the ordered atomic array.

Polymers rely on carbon as the main element for their structure. Carbon atoms are linked together in long chains to form the backbone of polymer molecules. Other elements such as hydrogen, oxygen, nitrogen, and occasionally other elements like sulfur or silicon can also be present in polymer structures, but carbon is essential for their formation.

Plastics are typically good electrical insulators, meaning they do not conduct electricity well. This is due to their molecular structure which restricts the flow of electrons. However, some plastics can become conductive when certain additives or fillers are included in their composition.

the coefficient of restitution for the perfectly plastic body is zero(0).

the coefficient of restitution for the perfectly elastic body is one(1).

When two polymers of amino acids join together, it is a dehydration synthesis reaction. Just like all other dehydration syntheses, water is released due to the formation of a peptide bond.

DNA polymerase catalyzes the formation of phosphodiester bonds between adjacent nucleotides in the DNA polymer being formed. This enzyme helps to link the 3' hydroxyl group of the growing DNA chain to the 5' phosphate group of the incoming nucleotide.

The (plastic) or rubber or whatever is covering a wire acts as an insulator to keep the metal parts (the conductor) of the wire from touching each other (which would cause a short circuit and possibly a fire) and from touching you when energized (which could cause a nasty shock.)

DNA consists of two long polymers of simple units called nucleotides, with backbones made of sugars and phosphate groups joined by ester bonds. These two strands run in opposite directions to each other and are therefore anti-parallel. Attached to each sugar is one of four types of molecules called nucleobases .

In general, paper bags can support more weight than plastic bags due to their stronger structure and ability to hold heavier items. This difference is mainly because paper bags are made from a renewable and biodegradable material that is typically thicker and more durable than single-use plastic bags.