The rubber band becomes warm because of friction. if you ever listen to school you would have known that.
When it's released, the rubber band delivers almost as much energy as you had to produce in order to stretch it. The little bit that's missing is the energy that caused the rubber band to get warm as you stretched it.
Rubber bands become warm when stretched repeatedly because the mechanical deformation causes friction between the polymer chains in the rubber, generating heat. This frictional heat is a result of the movement and reorganization of the polymer chains as the rubber is stretched.
When a rubber band is stretched, the polymer chains within the rubber band are forced to align and straighten out. This alignment and straightening of the polymer chains requires energy, which is converted into heat. As a result, the rubber band feels warm to the touch.
Cold temperatures can cause rubber bands to become stiffer and less elastic, as the molecules in the rubber contract and have less energy to move around. This can make the rubber band more brittle and prone to breakage when stretched. Warm temperatures, on the other hand, help the rubber band regain its elasticity.
A relaxed rubber band seems like it should expand when heated but in fact it will contract due to the increase in the tension of the rubber band. The force of tension in a rubber band can be modeled by Hooke's Law:F = -kxwhere k the spring constant is directly proportional to the temperature. According to Hooke's law a stretched rubber band should have an increase in tension when heated. However a stretched rubber band cannot contract until its let go and by Hooke's law there is no tension on a relaxed spring so how can there can be any contraction? Well, tension is derived from the change in Entropy by heating the rubber band. Entropy is a way of measuring the amount of 'disorder' in a system. The rubber band can be looked as a string of molecules. So when the string is all laid out it is has low 'disorder'. If the string is all balled up it has high 'disorder'. So if rubber band is heated the Entropy increases which pulls the string of molecules into a ball. This increase the tension in a relaxed rubber band which causes it to contracts it.
yes it does because from all the warm,hot,cold,rainy weather it does affect it if there was lighting it would shocked the rubber band to have cracks or marks or it can sometime pull out the rubber band
I usually microwave an ice pack for 30 seconds then rubber band it around the thermos.
WARM!! Totally because if you are cold you are more likely to pull a muscle as you stretch. To warm up jog on the spot and do star jumps stuff like that. Do not forget to stretch slowly.
It shouldn't hurt, if it hurts the muscle is not warm yet. When it will be warm, you will see the same stretch will be painless.
its best to stretch with a warm muscle
Stretching is warming up. Therefore, it is OK to stretch if the weather is hot and body is already warm.
stretch, warm up, exercise, cool down I Know but in A+ is like that Warm Up, Stretch, exercise, cool down