The rationale of the experiment is to determine how heat affects the elasticity of rubber bands. Rubber is known to be a natural polymer, because of this the chains in molecules in rubber bands are elastic, or in other words they stretch when they are pulled. When at room temperature, and stretched, the elastic polymers in rubber bands are known to stretch and return back to their original size when let go. But when heated, it is known that the movement of the molecules is looser so in other words the rubber band can stretch farther without snapping. The main goal of the experiment is to determine whether rubber bands are gradually worn down in appliances, knowing that we use rubber and heat in almost all home appliances, the experiment allows us to determine of the produce is worth our well earned money. …show more content…
The question asks: How does the temperature of a rubber band affect the distance in(cm.) the rubber band stretched before it snaps?
The experimental hypothesis states: If a substantial amount of heat is applied to a normal rubber band and stretched it will stretch farther because of the rapid movement of the molecules when heated, allowing the polymers to stretch farther.
To correctly conduct the experiment the following steps and procedures need to be followed,
Gather Materials
Heat water to desired temperature on stovetop. (check temperature using thermometer.)
Use scissors to cut the rubber band so that it is a straight line.
Tie one end of the rubber band to the stick on the top of the cylinder, tie the other to the weight
Pour the water into the graduated cylinder
Slowly submerge the rubber band into and the weight into the water
After 1 minute in the water measure the rubber bands stretch.(Check water temperature again using thermometer)
Record results.
Repeat steps 1-8 2 more times with desired temperature
Repeat steps 1-9 2 more times desired temperature
Repeat steps 1-9 2 more times with desired
temperature Potential risks include the water cooling down too much while the rubber band is submerged causing it to cool off as well, not allowing the rubber band to stretch completely. Also, it is possible if not handled carefully, the boiling water can burn the person handling it. Another possible risk is that when submerging the rubber band into the water, the pole does not hold onto the edges of the graduated cylinder correctly causing the rubber band to fall into the water, so that no data can be collected. When analyzing the experiment a chart will be made to record the max stretch the band and the temperature it was submerged into. Also, a graph will be made to determine the final outcome of the experiment.
In the lab the isopods were observed in a way to where behavior and structures could be properly recorded. The isopods were revealed to two dissimilar scenarios, normal temperature water vs. warm temperature water, to calculate which environment was most preferred. In each distinct scenario ten isopods were placed ten a choice chamber, one side being normal temperature (26.7celsius) and the other being warm temperature (43.3 celsius) , and observed for a total of ten minutes with thirty second intervals which was when we recorded our observations. After observations, it was seen that normal conditions was the most preferred environment by the isopods. In the scenario the Isopods exhibited taxis behavior, which is behavior caused by factors such as light, temperature, water and such. Nothing physical, but rather environmental.
5.) One at a time, place your test tubes in the water bath and heat the first test tube to 25 , the second to 50 , the third to 75, and the last to 100 degrees c. Remeber to stir with your stirring rod every so often.
Step 4:Make sure the person holds the clothespin between their thumb and index finger and squeeze until the two ends meet.
rings on the ends of the cinch. Next, take the two d-rings in the center of the cinch and with your
The data which was collected in Procedure A was able to produce a relatively straight line. Even though this did have few straying points, there was a positive correlation. This lab was able to support Newton’s Law of Heating and Cooling.
Stiffness The effect of this additive of the polymer in terms of stiffness is that it affects the polymer in a good way. This is because it makes the polymer stiff and more tough when it is made.
The Effect of Applying Weight to an Elastic Band and How it Affects the Length it Stretches To
To investigate the affect the material of a ball has on the bounce height of that ball where the drop height (gravitational potential energy), temperature, location, ball, and air pressure of the ball are kept constant.
- Hold the bob at a right angle from the clamp stand, and let it drop,
Also, when we put the insulation cans in warn water the water heated up the can. And lastly, in the insulated can experiments, both cooling and heating, when the cans temperature was changed it in turn changed the air temperature
Place the mouthpiece in your mouth. Make sure your lips are closed tightly around it.
tube 1, which was at 0° C produced very little )2. As the temperature increased in test tube
Since the early 1900’s, many different plastics have been developed, each having a special characteristic or advantage that makes it good for various purposes. Some plastics stood heat better, while some withstood shock better. Some could be spun into thread from making fabrics such as nylon. In 1938, Du Pont publicly announced the new synthetic fiber, nylon. The memo, that went out announcing nylon, defined “Nylon is the generic name for all materials defined scientifically as synthetic fiber-forming polymeric amides having a protein-like chemical structure; derivable from coal, air and water, or other substances and characterized by extreme toughness and strength and the peculiar ability to be formed into fibers and into various shapes such as bristles, sheets, etc” (138, 139).
Rubber is a valuable commodity in today's economy. A vast number of products are made from it, including washers, gloves, gaskets, tubing, waterproof clothing, toys, erasers, belts, elastics, bottle stoppers, and insulation for electrical wiring. The largest single use of rubber is in the manufacture of pneumatic tires which consumes 60% to 70% of the total world production each year. Demand for rubber has grown remarkably since the beginning of the industrial revolution.