When the chains cool down, they relax and stretch out, causing the material to expand. As the rubber is stretched the bonds between adjacent chains are broken. Stretching a rubber band makes it get hot — heat energy is lost. Therefore if you put heat energy into a rubber band it will get shorter — unlike most materials when they are heated.
Once you let go of the rubber the chains go back to their relaxed state of high entropy and disorder. This is what makes rubber go back to its original shape and size. So, it can be said that for a given amount of stress, the strain produced in the steel is comparatively smaller than the strain produced in the rubber.
Since, the iron rod regains its original configuration more efficiently than rubber, it is iron which is more elastic than rubber. However, the iron rod is less plastic because it shows more tendency to return to its original configuration after the deforming forces are removed. The polymer chains in rubber seals allow them to stretch and contract. Rubber polymer molecules have interesting properties that allow them to change size when exposed to extreme temperatures.
If you need to change a seal to a smaller size, heating it can cause it to shrink. Thermal expansion caused the rubber bands to react as they did. When the rubber bands were heated, the particles stretched out, making them more elastic and able to withstand greater force. As expected, the modulus of elasticity decreases with increases temperature. Increase in temperature in the4 metal material can increase the vibration of atoms in the crystal structure, which will increase the atomic distance and decrease the atomic force.
Rubber bands are made of natural or synthetic rubber, which are polymers. This is also the mark from where you will measure the distances your rubber bands have flown. Make sure he or she has a piece of chalk. Remember the angle and height at which you hold the ruler because you will need to keep it the same for each rubber band launch. Have your helper circle where each lands.
Write these distances down under the heading "10 cm. Shoot at least five rubber bands for each stretch length. After each launch, have your helper circle where they land. After launching five rubber bands at a given stretch length, measure the distances from your line to the circles. Write these distances under a heading for their stretch length for example, "20 cm".
Did they land far from where the rubber bands landed that were launched using different stretch lengths? Do your data follow any type of pattern or trend? What was the relationship between the stretch length and the launch distance? What do you think this indicates about the relationship between potential and kinetic energy when using rubber bands? How do these variables affect the distance the rubber band travels? Design a separate activity to test each of these variables separately.
How do the data collected using these other mechanical systems compare with that collected using rubber bands? Can you define an equation that expresses the relationship between potential and kinetic energy in this system? Observations and results Did the rubber bands stretched to 30 cm launch farther than the other rubber bands? Did you see a linear relationship between the launch distance and stretch length when you graphed your data? You input potential stored energy into the rubber band system when you stretched the rubber band back.
Because it is an elastic system, this kind of potential energy is specifically called elastic potential energy. So, the thicker the rubber band , the farther it will fly. As the rubber is stretched the bonds between adjacent chains are broken.
Stretching a rubber band makes it get hot — heat energy is lost. Therefore if you put heat energy into a rubber band it will get shorter — unlike most materials when they are heated. If you stretch a rubber band , you pull those spaghetti-shaped molecules into a more or less straight line. That makes them pull inward on the ends of the rubber band.
The stretched rubber tries, so to speak, to become short, thick, and flabby so the molecules will have more room to move around sideways. Storing your rubber bands properly will extend their useful life and keep your office space tidier. Separate rubber bands into piles according to size.
Place each pile into separate sealable freezer bags. Place the bags in a lidded container and place this in a cool, dark area, such as a closet or drawer.
Kinetic energy is energy in an object because of its motion. For example, a rubber band that is stretched has elastic potential energy, because when released , the rubber band will spring back toward its resting state, transferring the potential energy to kinetic energy in the process.
Answer: The rubber band works as a spring, so the force that you need to stretch it would be equal to: So you need to apply force to stretch it, and when you put it again in the stack of papers , the stack of papers applies a normal force against the rubber band that keeps the rubber band a little bit stretched.
This means that if I stretch the rubber band a distance of about 20 centimeters that's around the breaking point then there would be 1.
When you wind up the car's axle you stretch the rubber band and store potential energy. The rubber band can slip relative to the wooden axle, preventing the wheels from spinning.
Even if the wheels do spin, there might not be enough friction with the ground, causing them to spin in place without moving the car. The rubber piece will stretch, but not break. The tension throughout the entire band , both thin and thick areas will be 1 kg of force or to be more scientifically correct -- 9. The tension must be constant because every part of the rubber is lifting the same 1 kg weight. Here's the rub: the problem with rubber bands is that they are not designed to withstand the temperature of boiling water.
Rubber bands are made of natural or synthetic rubber , which are polymers. Polymer materials age along the time, usually lose their elasticity due to degradation reactions.
Rubber bands are made of natural rubber.
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