Francis stretched a rubber band five times. after that, he observed that the rubber felt warm. did the rubber band gain heat? a. no it is not evident b. yes, the rubber band felt warm means it gained heat c. yes, the rubber band felt warm means it lost heat d. no, temperature is not related to again or loss of heat
When Francis stretched the rubber band and, apparently, felt warm may not immediately mean that it either gained or lost heat. Therefore, the answer to this particular question will be “(a) no, it is not evident.” The fact that Francis stretched the band for five times is not conclusive enough to determine the heat gain.
2.Stretch until its break apart
1.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.
1.because the rubber band will be expanded
Rubber bands are made of natural rubber. Natural rubber is made of long chains of molecules called polymers. ... The result is a property called elasticity, the polymers are elastic. This is why rubber bands are sometimes called elastic bands.