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How long does it take for heat to expand the length a rubber band stretches?
Wiki User
∙ 13y ago
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 = -kx
where 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.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoHeating a rubber band doesn't actually cause it to expand it will make it contract. If you stretch a rubber band it will give off heat. And when you let it go it absorbs heat. If you stretch the band fast enough open and closed it may give off heat faster than it can absorb such that it cannot contract back to its relaxed state so it temporarily appears expanded.
Wiki User
∙ 12y agoThe rubber band becomes warm because of friction. if you ever listen to school you would have known that.
Wiki User
∙ 9y agoRubber bands are composed of loosely-packed chains of atoms. They contract when heated because the entropy is increased, which is the amount of disorder among the molecules.
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Does temperature affect the elasticity of a rubber band'?
no it does not change the elasticty if any thing it makes the rubber band smaller.What effect does heat have on the elasticity of rubber?That is not an easy question to answer but the heat stretches the rubber band because the molecules have to arrange or move themselves around. When a rubber band isn't being stretched the molecules are in a srtaight line.
Is a rubber band insulator or conductor?
A rubber band is an insulator as it does not allow electrons to pss through it
How do you clean a rubber watch band?
How do u clean a rubber watch band
What is a good title for a science fair project dealing with rubber band elasticity and temperature?
or RUBBER BAND ELASTICITY AND TEMPERATURE
A rubber band slingshot shoots a 25g stone What is the initial speed of a stone if the rubber band is drawn back 0.15m with a force of 27N?
This is hard to measure because you need to know the rebound of the rubber band and the force pushing against it, e.g. if you were under water the force will be different.
Tyler stretches a rubber band so that it is tight. The stretched rubber band has?
it has potential energy
Could you give me a sentence with stretches?
A rubber band stretches really well.
What happens when a rubber band is stretched?
WELL................................................ it stretches
Where does the potential energy in the rubber band came from?
A rubber band has energy when it is stretched. The energy comes from whatever stretches it, for example, your muscles.
Can you predict the force needed to stretch the rubber band to 40.0cmwhy or why not?
No. You also need to know the properties of the rubber band - specifically, how much it stretches for every unit of force applied.
What is a good sentence for the word expand?
This rubber band expands when I put it in my hand.
Does substance affect the size of the bubble?
Yes it does. When you blow a bubble you increase the pressure inside of it. So now we have a sphere with more pressure inside than out. The inside pressure pushes the skin of the bubble outward and stretches it. This is very much like hanging a weight from a rubber band. The rubber band stretches, but only so much. The tension in the band increases the more it is stretched until the tension equals the weight. If you add more weight then the rubber band stretches more. The same for the bubble, the skin of the bubble stretches (bubble gets bigger) until the tension in the skin matches the pressure in the bubble. A different substance will stretch more or less. There are complicating factors: pressure decreases inside the bubble as it expands, responses are not linear blah blah blah. But the simple answer is that just like a rope will stretch less than a rubber band, so different bubble substances will expand differently to make different sized bubbles.
What rubber band will shot farther a thick rubber band or a thin rubber band?
it probably depends on the length. First instict, I would say a thin one, but as I said before, it all depends
Does temperature affect the elasticity of a rubber band'?
no it does not change the elasticty if any thing it makes the rubber band smaller.What effect does heat have on the elasticity of rubber?That is not an easy question to answer but the heat stretches the rubber band because the molecules have to arrange or move themselves around. When a rubber band isn't being stretched the molecules are in a srtaight line.
If you shoot a rubber band how far will it go?
It depends on the rubber band if is a small rubber band then it will go about 20'and if it is an bigger rubber band then it will go about 35' but it depends on the rubber band and the way you shoot the rubber band
Which property of the rubber band changes when it is stretched?
Its length, linear density, thickness, and temperature all change.
Is a rubber band organic or inorganic?
a rubber band is organic
